General A&P Practice Test

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• Which solution should be used to neutralize nickel-cadmium battery cases and drains affected by electrolyte?
• Which statement about Alodine coating is accurate?
• Which statement about aircraft bolts is correct?
• Flexible lines must be installed with which slack?
• Which statement about residual magnetizing inspection is true?
• The clearance between the piston rings and the ring lands is measured with a
• Select the fraction which is equal to 0.0250
• Which statements are true about sketches?
• What must the person who complies with an Airworthiness Directive do with maintenance records?
• Excessive stress on fluid or pneumatic metal tubing due to temperature changes can best be avoided by?
• Which nondestructive test confirms the soundness of a bonded honeycomb repair after cure?
• Which of the following materials may be inspected using the magnetic particle inspection method?
• Under a Supplemental Type Certificate, can more than one applicant obtain approval for the same design change?
• Which of the following is Newton's First Law of Motion, generally termed the Law of Inertia?
• Which is an acceptable first step procedure when cleaning a transparent plastic surface?
• What is the term for a specific measured distance from the datum to a point on an aircraft?
• The replacement of a damaged engine mount with a new identical engine mount purchased from the aircraft manufacturer is considered a
• Why is ethylene dibromide added to aviation gasoline?
• The part department profit is 12 percent on a new part. How much does the part cost if the selling price is $145.60?
• In a circuit diagram, which point is considered to be at zero voltage?
• Lift on a wing is produced by
• In the SHEL model, which statement best describes the goal?
• The total no-load voltage of the 12-cell lead-acid battery (2.1 V per cell) is:
• Which action would most effectively reduce galvanic potential between two metals in contact?
• In nickel-cadmium battery charging, water is consumed due to gas formation. Which option correctly states this relationship?
• Flexible hose used in aircraft systems is classified in size according to which dimension?
• On a fillet weld, what percentage of the base metal thickness is considered penetration?
• Which pair of terms does Dr. James Reason use to categorize human failure?
• Which instrument would you use to measure the thickness of piston rings?
• The total circuit resistance when a 0.52 Ω internal resistance battery drives a 2 Ω load is:
• Which maintenance record entry best describes the action taken for a .125 inch deep dent in a straight section of 1/2 inch aluminum alloy tubing?
• Which of the following is a desired effect of Alodine on an aluminum alloy?
• What does TCDS designation code '2 PCSM' mean?
• Which nondestructive testing method is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?
• A hydraulic system schematic drawing typically indicates which of the following?
• Which class shows the order of assembly for parts?
• What is the color of an AN steel flared tube fitting?
• Put the following steps for preparing a flare in tubing into the correct order: 1) Place the tube in the proper size hole in the flaring block; 2) Project the end of the tube slightly from the top; 3) Slip the fitting nut and sleeve on the tube; 4) Strike the plunger several light blows and turn the plunger one-half turn after each blow; 5) Tighten the clamp bar securely to prevent slippage; 6) Center the plunger over the tube.
• Compute the square root of 37,221,835 to four decimals.
• An increase in which of the following factors will increase a circuit's inductive reactance?
• Airworthiness Directives are issued primarily to correct unsafe conditions. Which statement best reflects this?
• If the pressure on a confined liquid is doubled while the temperature remains constant, the volume will
• Reheating of a metal can significantly alter its properties in the reheated area.
• Based on the weight and balance data provided, what is the empty weight center of gravity (EWCG) of the aircraft?
• How are aviation fuels, which possess greater antiknock qualities than 100 octane, classified?
• Under what condition are adverse loading checks conducted?
• Which solvent is used to clean acrylics and rubber?
• Check thrust bearing nuts for tightness on new or newly overhauled engines at the first 50 hour inspection following installation. Subsequent inspections on thrust bearing nuts will be made at each third 50 hour inspection. From the above statement, at what intervals should you check the thrust bearing nuts for tightness?
• A person working under the supervision of a certified mechanic with an airframe and powerplant rating is not authorized to perform a 100 hour inspection.
• When installing bonded clamps to support metal tubing, which practice is correct?
• Which of the following are the three classes of working drawings?
• When computing weight and balance, an airplane is considered to be in balance when
• If a branch is removed from a parallel circuit of three equal resistors, what happens to the total resistance?
• Which statement is true?
• Under current airworthiness standards, the oil contained in the supply tank is considered a part of which weight?
• Which statement about fabric replacement on fabric-covered parts is correct?
• What type of line is normally used in a mechanical drawing to represent an edge or object not visible to the viewer?
• Which statement best describes the end-of-charge voltage for a 19-cell nickel-cadmium battery during charging?
• Which method is best for detecting surface-opening cracks in aluminum forgings and castings?
• If the temperature of a confined liquid is held constant and its pressure is tripled, the volume will
• If the cost of a part is $108 and the profit is 12 percent of cost, what is the profit amount?
• In nickel-cadmium batteries, a rise in cell temperature causes what change in internal resistance?
• During charging of a nickel-cadmium aircraft battery, what is the effect of gassing on the electrolyte?
• A 0.25 horsepower motor at 240 V, 90% efficiency, draws how many amperes from the supply?
• The issuance of an Airworthiness Certificate is governed by which regulation?
• In nondestructive testing, a discontinuity is defined as what?
• A scratch or nick in aluminum tubing can be repaired provided it does not
• What must accompany fuel vaporization?
• Which document is commonly used to authorize field approvals for minor alterations or repairs?
• If a round rod has a radius of 11/32 inches, what is its diameter in inches as a decimal?
• Two light assemblies require 3 amperes each during operation at 24 volts. The total current is
• Which material is used for aircraft engine firewalls due to heat resistance?
• Which of the following statements about the Airworthiness Directive (AD) System is true?
• What is the effect of maintaining tension in tubing under hydraulic pressurization?
• Maximum life is 1200 hours; observed average life is 960 hours. What percent of maximum life has been achieved?
• Which option best describes the effects of annealing on steel and aluminum alloys?
• If the distance between the plates of a capacitor is reduced while plate area stays the same, the capacitance will
• The boiling point of a given liquid varies directly with which factor?
• In engineering drawings, what is a datum used for?
• Caustic cleaning products used on aluminum structures have the effect of producing
• Which statement relating to the residual magnetizing inspection method is true?
• The empty weight CG is defined as the center of gravity of the aircraft when it is in what condition?
• What is the square root of 4 raised to the fifth power?
• The square root of 124,992 is which of the following?
• Magnetic particle inspection is typically used on which class of materials?
• The high end of the white arc on the airspeed indicator would be at how many knots?
• If three capacitors are connected in parallel with values 2 μF, 3 μF, and 5 μF, what is the total capacitance?
• Where is the record of compliance with Airworthiness Directives or manufacturers' service bulletins normally indicated?
• To verify a micrometer’s accuracy before precision measurements, which instrument would you use?
• When may an otherwise qualified mechanic who does not read, write, speak, and understand English language be eligible to apply for a mechanic certificate?
• Which statement about alodizing is correct?
• Which start condition is most likely to cause engine damage?
• A primary cause of intergranular corrosion is
• Which FAA publication informs aircraft owners and other interested persons about unsafe conditions and prescribes the conditions under which the product may continue to operate?
• Which coupling nut should be selected for use with 1/2 inch aluminum oil lines assembled using flared tube ends and standard AN nuts, sleeves, and fittings?
• Which aluminum designation indicates that the metal has received no hardening or tempering treatment?
• Galvanic corrosion is caused by contact between two unlike metals.
• What is the operating resistance of a 30-watt light bulb designed for a 28-volt system?
• Which FAA approved document provides the leveling means to be used when weighing an aircraft?
• Which statement best describes vaporization in fuels?
• Fretting corrosion is most likely to occur due to what condition?
• Which method is most appropriate for detecting surface cracks in aluminum forgings?
• The total piston displacement for the 4-cylinder engine described earlier is approximately
• Unless otherwise specified or required, aircraft bolts should be installed so that the bolt head is
• The maximum weight used in weight and balance control of a given aircraft can normally be found in which document?
• What condition is necessary for galvanic corrosion to occur?
• At what electrolyte temperature should a specific gravity correction be considered when using a hydrometer?
• What is the likely result of service and charging nickel-cadmium and lead acid batteries together in the same service area?
• A fully charged lead-acid battery will not freeze until extremely low temperatures because
• The term 'cold flow' is generally associated with
• When a hung start occurs in a turbine powerplant, what is the recommended action?
• Where are the technical descriptions of certificated propellers found?
• Who is responsible for upkeep of the required maintenance records for an aircraft?
• An aircraft with an empty weight of 1800 lbs and an empty weight CG of +31.5 inches was altered as follows: two 15-lb pax seats located at +72 were removed; structural modifications increasing the weight by 14 lbs at +76; a seat and safety belt weighing 20 lbs were installed at +73.5; radio equipment weighing 30 lbs was installed at +30. What is the new empty weight CG?
• An engine develops 108 horsepower at 87 percent power. What horsepower would be developed at 65 percent power?
• A rectangular shaped fuel tank measures 27-1/2 inches in length, 3/4 foot in width, and 8-1/4 inches in depth. How many gallons are within the tank?
• Which statement describes how annealing affects internal stresses?
• Inductive reactance increases with which factor in an AC circuit?
• Which of the following are considered approved data for maintenance?
• A certificated mechanic without an inspection authorization who signs the appropriate block on FAA Form 337 is doing what?
• What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power on?
• Which effect does not apply to the movement of electrons flowing in a conductor?
• Which heat-treatment process produces a hard, wear-resistant surface over a strong, tough core?
• What is the maximum penalty for cheating or other unauthorized conduct when taking an FAA mechanic test?
• If a component is attached with a bolt and a castle tension nut, and the cotter pin hole does not align within the recommended torque range, the acceptable practice is to
• Which document would you consult to determine propeller compatibility with a given engine-airplane combination?
• In the SHEL model, which description best reflects its focus?
• Which set represents the six basic shapes commonly used in sketching?
• A certificated mechanic with a powerplant rating may perform the 100-hour inspection on a powerplant or any component thereof and approve for return to service. Which statement best describes this authority?
• The rust or corrosion that occurs with most metals is the result of
• Which of the following hose materials are compatible with phosphate-ester base hydraulic fluids?
• Holes and a few projecting globules are found in a weld. What action should be taken?
• Select a characteristic of a good gas weld
• When approving for return to service after maintenance or alteration, what information must the approving person enter in the aircraft's maintenance record?
• For Part 91 operations, what difference is there between record entry requirements for maintenance and inspections beyond the description of the work performed and the type and extent of inspection?
• If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, which gauge should be used?
• A drawing that shows how multiple parts fit together is called an
• Which option describes the 'cold flow' phenomenon?
• During evaluation of a welded joint, which factors should the mechanic be familiar with?
• Fretting corrosion is most likely to occur
• Which statement about detail drawings and assembly drawings is true?
• Which of the following can provide the empty weight of an aircraft if the aircraft's weight and balance records became lost, destroyed or otherwise inaccurate?
• When an airworthy (at the time of sale) aircraft is sold, the Airworthiness Certificate:
• In a hydraulic system, if the supply pressure remains constant but the piston area is increased, what happens to the force exerted on the piston?
• The primary purpose of providing suitable bends in fluid and pneumatic metal tubing runs is to
• One primary reason to avoid non-approved cleaning compounds when washing aircraft is that they can cause
• Which of the following statements is true for a certificated and appropriately rated mechanic regarding repairs and alterations?
• Which statement is true about diagrams and schematics?
• If the volume of a confined gas is doubled while the temperature remains constant, the pressure will
• In the process of weighing an airplane toward obtaining the CG, the arms from the weighing points always extend
• In weight and balance, what is an arm?
• The typical application for zener diodes is:
• A 48 volt source is required to furnish 192 watts to a parallel circuit consisting of 3 resistors of equal value. What is the value of each resistor?
• Metal tubing fluid lines are sized by which two dimensions, in increments of 1/16 inch?
• Which item is included in a return-to-service entry after maintenance?
• In a 24-volt source delivering 48 watts to a parallel circuit consisting of two equal resistors, what is the value of each resistor?
• Which condition has the most potential for causing engine damage when starting or attempting to start a turbine engine?
• What is the class of working drawing that is the description/depiction of a single part?
• What determines whether a moment value is shown as positive or negative in weight and balance calculations?
• What unit is used to express electrical power?
• A part being prepared for dye penetrant inspection should be cleaned with
• Which statement is true regarding minimum allowable bend radii for 1.5 inches OD or less aluminum alloy and steel tubing of the same size?
• TSO stands for which aviation term?
• When is a mechanic responsible for checking AD compliance?
• Regarding orthographic projection, which statement is true?
• When taxiing an airplane with a quartering tailwind, the elevators and upwind aileron should be in which position?
• If you need to check a valve stem for stretch, which instrument is appropriate?
• The maximum weight of an aircraft is the empty weight plus which components?
• Which restoration method is used for damaged anodized surfaces?
• Which statement about private aircraft weighing requirements is true?
• In a parallel circuit with three 6-ohm resistors across a 12-volt battery, what is the total current?
• A 14 ohm resistor is to be installed in a series circuit carrying .05 ampere. How much power will the resistor be required to dissipate?
• Find the square root of 124.9924.
• Instrument repairs may be performed
• The impedance of an AC circuit is composed of which components?
• If a CG is located at 24% of MAC, this percentage expresses distance from which reference?
• Evaluate (32 × 3/8) ÷ (1/6).
• The replacement oil line must be fabricated from 3/4 in 0.072 5052-0 aluminum alloy tubing. What is the inside dimension of this tubing?
• Which statement about hydrometer temperature correction is true?
• Which heat-treating operation creates a hard surface by introducing carbide or nitride into the surface layer?
• When the CG is within the allowed range, what is its expected effect on controllability?
• What force must be applied to roll a 120-pound barrel up an inclined plane 9 feet long to a height of 3 feet?
• Which diagram is most useful for identifying how components come apart for maintenance?
• The useful load of an aircraft consists of the
• What is the role of the datum when defining LEMAC and TEMAC?
• Exfoliation is associated with which phenomenon in metals?
• In hydraulic calculations, what unit is used for pressure when multiplying by area to obtain force?
• Galvanic corrosion is most rapid and severe when which relationship between anodic and cathodic surface areas exists?
• An aircraft had an empty weight of 2886 lbs with a moment of 101673 in-lb before alterations. After removing two pax seats at +71, installing a cabinet (97 lb) at +71, installing a seat and safety belt (20 lb) at +94, and installing radio equipment (30 lb) at +94, the new empty weight CG moved 1.62 inches aft of the original. If the original empty weight CG was +35.21 inches, what is the new CG?
• The basis for transformer operation is the use of alternating current due to what phenomenon?
• Who has the authority to approve for return to service a propeller after a 100 hour inspection?
• An empty aircraft has combined main gear weight 3540 lb at 195.5 in, nose gear weight 2322 lb at 83.5 in; datum is forward of the nose. What is the empty CG?
• How is a quality system assured?
• Sketches are usually made easier by the use of graph paper.
• Suitability for use of a specific propeller with a particular engine-airplane combination can be determined by reference to what informational source?
• Which statement about flare fittings is correct?
• Which of these materials is the most cathodic?
• What is the primary purpose of the Airworthiness Directive system?
• If MTOW is 60,000 pounds and BEW is 40,000 pounds, the useful load is which value?
• Maximum zero fuel weight represents the maximum permissible weight of an aircraft under what condition?
• To obtain useful weight data for determining the center of gravity, the aircraft must be weighed in which condition?
• The dew point is defined as
• A person should approach or leave a helicopter in the pilot's field of vision whenever the engine is running in order to avoid
• When an anodized surface coating is damaged in service, it can be partially restored by
• In rectifier circuits, the function of a diode is to
• In a sectional view, which features are typically illustrated?
• What sheet size is required to fabricate a cylinder that is 20 inches long and 8 inches in diameter?
• Airworthiness Directives are issued to address
• What is the square root of 37,221,835 to four decimal places?
• A fuel that does not vaporize readily enough can cause
• For small aircraft loading computations, what information from the weight and balance records is necessary?
• What percent of maximum life is achieved if the average life is 875 hours and the maximum is 1000 hours?
• Which configuration requires the most electrical power?
• Which decimal is most nearly equal to a bend radius of 31/64?
• Capacitors are sometimes used in DC circuits to
• A Supplemental Type Certificate may be issued to more than one applicant for the same design change, provided each applicant shows compliance with the applicable airworthiness requirement. Which option best reflects this statement?
• In weight and balance calculations, what is the purpose of the datum line?
• For aircraft operated under Part 91, which of the following records must be retained and transferred with the aircraft when it is sold?
• What is a repair?
• What are the main differences between grades 100 and 100LL?
• In Alclad 2024-T4, the core material is heat treated aluminum alloy and the surface material is what?
• Who may perform a 100-hour inspection for aircraft operated for hire and approve for return to service?
• If a motor produces 746 watts of mechanical power from an input of 1500 watts, what is its efficiency?
• In general, a 3/8 inch aircraft high-pressure flexible hose compared to the same-size metal tubing in the same system will:
• What is the square root of 16 raised to the fourth power?
• In electrochemical corrosion, what is the role of electrical contact between anodic and cathodic areas?
• Sixty-five engines are what percent of eighty engines?
• Compute (-3 + 2) × (-12 - 4) + (-4 + 6) × 3.
• Which of the following includes all the regulatory definitions of 'maintenance'?
• A castellated nut and cotter pin assembly is designed to prevent which problem?
• During start after fuel flow begins in a turbine engine, which parameter is most important to monitor?
• What is descriptive of the annealing process of steel during and after it has been annealed?
• Which phrase best describes the contemporary safety view that emphasizes managing error?
• How many of these factors are essential knowledge for X-ray exposure? Processing of the film; Material thickness and density; Exposure distance and angle; Film characteristics.
• Gas emission is observed during charging of nickel-cadmium cells. Toward which part of the charging cycle is this observation characteristic?
• After a mechanic holding an airframe and powerplant rating completes a 100 hour inspection, what action is required before the aircraft is returned to service?
• What action is taken during towing to prevent accidental nose wheel steering operation?
• What should be the first step of the procedure in sketching an aircraft wing skin repair?
• What metal has special short-time heat properties and is used in the construction of aircraft firewalls?
• A 12 volt electric motor has 1,000 watts input and 1 HP output. Maintaining the same efficiency, how much input power will a 24 volt, 1 HP electric motor require?
• What effect does mixing aviation gasoline with jet fuel have on turbine engines?
• Fiber-type, self-locking nuts must never be used on an aircraft when the bolt is subject to which condition?
• If you observe a flashing white signal from the control tower while taxiing, what action should you take?
• A person installing a product, part, or appliance on a type certificated product must make certain that the item's records document what type of statement?
• What is the purpose of a maintenance record?
• Airworthiness directives are issued primarily to:
• Which description best matches a record entry for a dent repair described as welding a reinforcing plate over the dented area?
• What is the purpose of Aviation Maintenance Alerts?
• Rolling-type flaring tools are used to flare which materials?
• Compute 1/2(-30 + 34) × 5.
• The aluminum code number 1100 identifies what type of aluminum?
• A certificated mechanic shall not exercise the privileges of the certificate and rating unless, within the preceding 24 months, the Administrator has found that the certificate holder is able to do the work or the certificate holder has served as a mechanic under the certificate and rating for at least 6 months. Which statement best reflects the requirement described above?
• Which person is responsible for preparing FAA Form 337 when the work requires it?
• What is the main determinant of the dwell time to use when conducting a dye or fluorescent penetrant inspection?
• If the driving gear has 36 teeth and drives a gear with 20 teeth, and the driving gear rotates at 100 RPM, what is the driven gear RPM?
• Both gasoline and kerosene have certain advantages for use as turbine fuel. Which statement is true in reference to the advantages of each?
• In physics, which set of quantities is required to determine mechanical power?
• Who should prepare FAA Form 337 when the work requires it?
• Which material is used to remove corrosion from highly stressed steel surfaces?
• An aircraft with an empty weight of 2100 lbs and an empty CG of +32.5 inches underwent modifications: two 18-lb passenger seats located at +73 inches were removed; structural modifications at +77 inches increased weight by 17 lbs; a seat and safety belt weighing 35 lbs were installed at +74.5 inches; radio equipment weighing 35 lbs was installed at +95 inches. What is the new empty weight CG?
• Evaluate the expression sqrt[(-1776)/(-2) - 632].
• Which of the following is not a class of working drawings?
• What is the amount of work required to raise a 120-pound weight vertically by 3 feet (ignoring friction)?
• How much current does a 30 volt 1/2 horsepower motor that is 85 percent efficient draw from the bus?
• Which statement about the hydrometer reading of a lead-acid battery electrolyte is true?
• What is a simple method to locate the center of a circle on a sketch or piece of material?
• Which of the following is an example of a major repair?
• During taxiing, what does a flashing white light from the control tower indicate?
• The total power consumed by four 30-watt lamps connected in parallel to a 12-volt supply is
• Which regulation provides information regarding instrument range markings for an airplane certificated in the normal category?
• Two boxes weighing 10 lbs and 5 lbs are placed in an airplane so that their distance aft from the CG are 4 ft and 2 ft respectively. How far forward of the CG should a third box weighing 20 lbs be placed so that the CG will not be changed?
• To reconstruct lost or destroyed aircraft maintenance records, which item must be established?
• Which type of corrosion attacks the grain boundaries of aluminum alloys when the heat-treatment process has been improperly accomplished?
• Intergranular corrosion in aluminum alloy parts can be difficult to detect by surface indications. Which statement best describes this?
• Which of the listed conditions is NOT one of the requirements for corrosion to occur?
• Which numbering system is commonly used to locate positions along an aircraft fuselage, such as frames, stations, and bulkheads?
• Which statement correctly describes the minimum hose length related to a maximum end-to-end distance of 50 inches?
• In a metal tubing installation, which statement is true?
• Where should you find this entry? Removed right wing from aircraft and removed skin from outer 6 feet. Repaired buckled spar 49 inches from tip in accordance with figure 8 in the manufacturer's structural repair manual No. 28-1.
• The term 'return to service' refers to:
• Which container size is equal in volume to 60 gallons of fuel?
• Which organization governs the approval status of data used for major repairs?
• What determines the color pattern of the color-code bands on aircraft plumbing lines?
• As weighed, the total empty weight of an aircraft is 5862 lbs with a moment of 885957 in-lb. However, when weighed, 20 lbs of potable water were on board at +84 and 23 lbs of hydraulic fluid at +101. What is the empty weight CG?
• If the torque value for nuts is not given, where can recommended torque values be found?
• LEMAC and TEMAC are defined by distances from what reference?
• When measuring weight and balance, what term describes the distance from the reference point to the object?
• An airplane traveling 750 miles uses 60 gallons of gasoline. How many gallons will it need to travel 1500 miles?
• Which diagram shows the wire size required for a particular installation?
• An aircraft TCDS contains which of the following?
• During starting of a turbine powerplant using a compressed air starter, a hung start occurred. Select the proper procedure:
• A certificated mechanic with a powerplant rating may perform the 100-hour inspection on what scope?
• The action required by an AD may take what form?
• The combination of factors that contribute to thermal runaway for nickel-cadmium batteries installed on aircraft can be described as which of the following?
• Which term is used to indicate specific measured distances from the datum and/or other points identified by the manufacturer, to points in or on the aircraft?
• An alternating red and green light from the control tower means?
• According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records.
• In a sinusoidal AC signal, the peak value is equal to what multiple of the RMS value?
• A lead-acid battery with 12 cells in series (no-load voltage 2.1 V per cell) delivers 10 A to a 2 Ω load. The internal resistance of the battery is:
• In a DC circuit, capacitors smooth out pulsations because they store charge in which field?
• For major alterations on a US certificated aircraft, which is NOT considered approved data?
• For aircraft operated under Part 91, which of the following records must be retained for at least one year, or until the work is repeated or superseded?
• When towing an aircraft with a steerable nose wheel, what torque link lock setting is required?
• The three types of human error are
• Annealing steel results in slow cooling and low strength.
• Which factor most affects the speed of sound in the atmosphere?
• What is the decimal value of binary 1111?
• Bonded clamps are used for support when installing which type of tubing?
• What is an essential step before applying the dye penetrant developer?
• The temperature to which humid air must be cooled at constant pressure to become saturated is called
• The best tool to use when cutting aluminum tubing, or any tubing of moderately soft metal is the
• Which material cannot be heat treated repeatedly without harmful effects?
• To compute the maximum forward loaded CG, should minimum weights, arms, and moments be used for items located aft of the forward CG limit?
• How may magnesium engine parts be cleaned?
• Which nondestructive testing method requires little or no part preparation and detects surface or near-surface defects in most metals, and may also be used to differentiate metals and their heat treatment conditions?
• Which tool is used to measure the alignment of a rotor shaft or the plane of rotation of a disk?
• In AC circuits, RMS value is defined as
• Which term means .001 ampere?
• What is the color of 100LL fuel?
• In the theory of weight and balance, what is the name of the distance from the fulcrum to an object?
• If the reference datum line is placed at the nose of an airplane rather than at the firewall or some other location aft of the nose, which statement is true?
• Which statement about measurement tools is correct?
• If the empty weight CG lies within the empty weight CG limits, it is not necessary to calculate CG extremes. True or False?
• During an annual inspection, if a defect renders the aircraft unairworthy, which action is required of the disapproving person?
• Calculate 64 cubed.
• Which document is commonly used to indicate compliance with service bulletins or ADs?
• Compared with airplanes, the CG range for single-rotor helicopters is:
• Under Part 91, which records must be retained for at least one year or until the work is repeated?
• After taxiing a nosewheel-type aircraft, the nosewheel should be left
• Which entry best describes the action taken for replacing several damaged heli-coils in a casting, as detailed in the record example?
• Transfer of electric energy from one circuit to another without aid of electrical connections is called
• What is the volume in cubic inches of a rectangular tank that measures 60 inches by 30 inches by 12 inches?
• In a double-acting cylinder, with a piston area of 3 in^2 and a rod area on the rod side of 2 in^2, what is the effective area on the rod side when retracting?
• Which group is qualified to perform the 100-hour inspections on powerplants, propellers, or any components thereof and may release the same to service?
• Convert the binary number 1111 to decimal.
• How far does the hazard area extend forward of an idling jet engine?
• If an engine is turning at 1965 RPM at 65 percent power, what is its maximum RPM?
• In an internal combustion engine, what describes the total piston displacement?
• What is the primary purpose of ballast in weight and balance calculations?
• The correct way to connect a test voltmeter in a circuit is
• A 24 volt source is required to furnish 48 watts to a parallel circuit consisting of 4 resistors of equal value. What is the voltage drop across each resistor?
• Which statement best describes a method to demagnetize after magnetic particle inspection?
• Which logic gate provides an active high output only when all inputs are different?
• Which of the following best describes the term unairworthy?
• How long does the holder of a certificate issued under 14 CFR part 65 have to notify the FAA after any change in permanent mailing address?
• When a Teflon hose has been in service for a time, what condition may have occurred and/or what precaution should be taken when it is temporarily removed from the aircraft?
• What is the term for the point about which an aircraft would balance if suspended from the nose and tail?
• The sum of 7 cubed and the square root of 39 is approximately which value?
• A drawing in which the subassemblies or parts are shown as brought together on the aircraft is called what?
• Normalizing is a heat-treating process of
• What numbering system is used to locate fuselage frames?
• Which of the following indicates a correctly torqued nickel-cadmium cell link connection?
• In calculating empty weight, which statement describes the method?
• Why is steel tempered after being hardened?
• For which of the following reasons would a water break test be conducted?
• Scratches or nicks on the straight portion of aluminum alloy tubing may be repaired if they are no deeper than?
• Regarding the statements about STC data and TSO installations, which is true?
• When a charging current is applied to a nickel-cadmium battery, the cells emit gas toward which part of the cycle?
• The purpose of stall strips on airplane wings is to
• What action prevents rapid deterioration when oil or grease contaminates a tire?
• A certificated mechanic with a powerplant rating may perform a major repair to a propeller provided they have the necessary equipment.
• Ethylene dibromide in aviation gasoline serves to scavange lead oxide from the cylinder combustion chambers. Which of the following is its function?
• Which of the following is correct concerning a parallel circuit?
• Which statement is true regarding fuel viscosity and contamination?
• Symbols on the identifying color-code bands used on aircraft plumbing lines are composed of how many contrasting colors depending on line content?
• A bolt head marked with an X inside a triangle is classified as which type?
• In an Airworthiness Directive, the phrase 'required within the next 25 hours time-in-service after the effective date' is an example of which type of statement?
• Which term is used to label the positive human factors considerations in safety systems?
• The method used to rapidly charge a nickel-cadmium battery utilizes
• The lifting or flaking of metal at the surface due to delamination of grain boundaries caused by buildup of corrosion products is called what?
• The pattern for an inclusion in magnetic particle inspection is
• During turbine engine start, which indicator is used to assess the engine’s thermal condition?
• Which statement is true about clamps used to support lines?
• In voltage regulation using a zener diode, the diode is operated in which mode?
• If maintenance work is performed and the record is signed by an authorized person, this signifies
• Repairs to a buckled spar performed in accordance with the manufacturer's structural repair manual would typically be documented on which form?
• The square root of 1824 is approximately which value?
• The major source of weight change for most aircraft as they age is caused by?
• A hot start during turbine engine start is most likely caused by
• Spilled mercury on aluminum causes rapid and severe corrosion that is very difficult to control.
• What is the surface area of a cube with a side length of 7.5 inches?
• Primary responsibility for compliance with Airworthiness Directives lies with the:
• What step comes immediately after centering the plunger over the tube in the tubing flare process?
• In most aircraft hydraulic systems, two piece tube connectors consisting of a sleeve and a nut flare are used when a tubing flare is required. The use of this type connector eliminates which of the following?
• The opposition to the flow of alternating current produced by a magnetic field and EMF is called?
• 1.21875 is equal to
• Torque values can be found in AC 43.13-1B under which circumstance?
• An aircraft was not approved for return to service after an annual inspection and the owner wanted to fly the aircraft to another maintenance base. Which statement is correct?
• Which tool generally yields the most accurate airplane leveling for weighing?
• The useful load of an aircraft is the difference between which two weights?
• Which of the following sets correctly lists the three types of human error?
• A rectangular shaped fuel tank measures 37-1/2 inches in length, 14 inches in width, and 8-1/4 inches in depth. How many cubic inches are within the tank?
• Which statement describes how force output relates to piston area at a given pressure?
• Which term describes the ratio of actual water vapor in the air to the amount of water vapor the air would hold if saturated at the same temperature and pressure?
• When cleaning magnesium parts, use which type of brush?
• Per-cylinder displacement for the 6-cylinder engine with bore 3.5 inches and stroke 4.5 inches is approximately
• Which condition is an indication of improperly torqued cell link connections of a nickel-cadmium battery?
• Which statement is true about signing FAA Form 337 by a certificated mechanic without an inspection authorization?
• Per-cylinder displacement for the engine with bore 3.78 inches and stroke 4.5 inches is approximately
• A cabin entry light of 10 watts and a dome light of 20 watts are connected in parallel to a 30 volt source. If the voltage across the 10 watt light is measured, it will be
• The purpose of aircraft wing dihedral is to
• The replacement of a damaged vertical stabilizer with a new identical stabilizer purchased from the aircraft manufacturer is considered a minor repair.
• What is 7 cubed?
• When flaring aluminum tubing for use with AN fittings, the flare angle must be?
• Which two forms of indicating mediums are used in magnetic particle inspection?
• In the tubing flare process, which action follows centering the plunger over the tube?
• Select the fractional equivalent for a 0.0625 inch thick sheet of aluminum.
• Which aircraft record entry best describes a repair of a dent in a tubular structure dented at a cluster?
• A bolt with a single raised dash on the head is classified as which type?
• Which method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?
• When an aircraft is positioned for weighing on scales located under each landing gear wheel, which of the following may cause erroneous scale readings?
• What two types of indicating mediums are available for magnetic particle inspection?
• Which mixture weighs the least for the same volume of gas?
• If the volume of a fixed amount of gas is halved while the temperature remains constant, the pressure will
• Which statement best describes safe approach to a helicopter when its engine is running?
• In a PNP transistor, the device turns on when the base is relative to the emitter:
• Which will cause the resistance of a conductor to decrease?
• If dye penetrant inspection indications are not sharp and clear, the most probable cause is that the part
• Who is responsible for making the entry in the maintenance records after an annual, 100 hour, or progressive inspection?
• Which condition may cause erroneous readings when weighing under the wings or under the landing gear wheels?
• Each person performing an annual or 100 hour inspection shall use a checklist that contains at least those items in the appendix of 14 CFR Part 43.
• A primary cause of intergranular corrosion is
• If a certificate is suspended, what is the effect on the holder's privileges?
• Which publication contains standards for protrusion of bolts, studs, and screws through self locking nuts?
• Which entity is primarily responsible for ensuring that materials used in aircraft maintenance conform to standards?
• If BEW increases by 2,000 pounds while MTOW remains fixed, the useful load will
• Where is the datum in weight and balance measurements?
• A hydraulic cylinder has a piston area of 8 square inches and experiences 800 psi. What is the force exerted on the piston?
• AC 43.13-2A is an example of what type of publication?
• Alodizing is described as which type of treatment?
• In weight and balance computations, what type of measurement designates the arm?
• Which term is used to refer to the positive aspects of human factors in safety analysis?
• Certificated mechanics with a powerplant rating may perform
• What is the name of the document that lists the data required for identifying a type-certified aircraft or propeller and its limitations?
• Electrostatic fields are known as what?
• What is absolute humidity?
• If all seats are occupied, full baggage weight carried, and all fuel tanks full, what will be the weight condition of the aircraft?
• When a 100 hour inspection is completed, if separate maintenance records for the airframe, powerplant(s), and propellers are maintained, where is the entry for the inspection record?
• Which description best captures the factors contributing to thermal runaway in a nickel-cadmium battery installed on an aircraft?
• A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What nondestructive testing method is used to determine the soundness of the repair after the repair has cured?
• A drawing that shows the installation of a component in the aircraft is called a
• 0.000347 equals which scientific notation?
• What does the phrase 'within the next 25 hours time-in-service' imply in an AD?
• Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to
• Engine replacement: A Model B engine weighing 175 lb was replaced by a Model D engine weighing 185 lb at -62 in station. Previous empty weight was 998 lb and empty weight CG was 13.48 in. What is the new empty weight CG?
• In a series circuit with a 30-volt supply and resistors of 10 ohms and 20 ohms in series, what is the voltage drop across the 10-ohm resistor?
• In weight and balance calculations, the amount of fuel used for computing the empty weight and the corresponding CG is:
• Which document is used to document major repairs and alterations to an aircraft, such as structural repairs?
• A byte consists of how many bits?
• Which statement best describes who may perform 100-hour inspections on powerplants, propellers, or any components thereof?
• In a 3000 psi hydraulic system, a double-acting cylinder has a piston area of 3 square inches on the extension side and a rod attached with a cross sectional area of 1 square inch on the rod side. When retracting, what is the force produced?
• Magnetic particle inspection is used primarily to detect what kind of flaws?
• Replacement of fabric on fabric-covered parts is considered a major repair.
• If the volume of a cylinder with a piston at the bottom center is 84 cubic inches and the piston displacement is 70 cubic inches, then the compression ratio is
• How is the locking feature of the fiber-type locknut obtained?
• In a transformer with a turns ratio of 1:4, what happens to current?
• Why is it considered to normalize a part after welding?
• Schematic diagrams are best suited for which of the following?
• Forward biasing a solid state device will cause it to:
• In the designation 4130, which statement is true about the first digit?
• Which of the following is NOT a consequence of human error?
• Which statement about inspections is true?
• A pinion with 14 teeth drives a gear with 42 teeth. What is the simplest form of the teeth ratio?
• An AN clevis bolt is used only for which load applications?
• Which diagram uses the actual appearance of components rather than symbols?
• In what type of electrical diagram are images of components used instead of conventional electrical symbols?
• What may result if water is added to a nickel-cadmium battery when it is not fully charged?
• Which expression equals 16,300?
• Which requires the most electrical power during operation? Note: 1 HP = 746 watts
• Reheating of a heat treated metal with a welding torch is most likely to:
• What is the ratio of 10 feet to 30 inches?
• Which of the following best describes the function of the filler rod in a gas weld?
• In a balance computation, when an item located aft of the datum is removed, the change in moment is computed as:
• Which action is considered to affect CG results during weight and balance checks?
• When first starting to move an aircraft while taxiing, it is important to
• Slack must be left in a flexible hose during installation because, when under pressure, it
• Galvanic corrosion at the interface of a dissimilar metal part may best be prevented by which measure?
• What is the total capacitance of a circuit containing three capacitors of 0.25 μF, 0.03 μF, and 0.12 μF connected in parallel?
• In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes
• To detect a minute crack using dye penetrant inspection usually requires
• Through which material will magnetic lines of force pass the most easily?
• Which nondestructive testing method uses magnetic fields and iron particles to reveal flaws?
• Which item is not included in the calculation of empty weight?
• What is the total resistance of resistors 3 ohms, 5 ohms, and 22 ohms connected in series?
• Which statement about outside micrometers is true?
• What power of 10 is equal to 1,000,000?
• The useful load equals what?
• Which statement is true about RMS voltage relative to peak voltage in an AC cycle?
• Which document is typically used to determine the maximum weight and CG limits for a specific aircraft?
• Which tool can be used to determine piston pin out of round wear?
• Which of the following are acceptable to use when utilizing chemical cleaning agents on aircraft?
• Jet fuel number identifiers are
• Which factor has the least effect on the speed of sound in air?
• In a galvanic pair, which metal will corrode first?
• Which statement is correct about a parallel circuit?
• Which part of the FAA regulations prescribes the requirements for issuing mechanic certificates and associated ratings and the general operating rules for the holders of these certificates and ratings?
• Which type of crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?
• Under continuous longitudinal magnetization with a cable, which type of defect is detected?
• What is the maximum distance from the weld at which oxide should not form on the base metal?
• In a parallel circuit powered by a 24-volt source, the voltage across each resistor is what relative to the source voltage?
• The current through a 28-volt, 30-watt device is approximately
• What solvent is recommended for wipedown of surfaces just before painting?
• Which of the following best describes the detonation phenomenon?
• Which statement about the SHEL model is correct?
• Which document certifies the airworthiness of an aircraft and its continued operation?
• One purpose for schematic diagrams is to show the functional purpose of components within a system. Which of the following best matches this purpose?
• What is the circumference of a circle with a diameter of 8 inches?
• One way a part may be demagnetized after magnetic particle inspection is by
• Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending?
• Which of the following is NOT considered a method of heat transfer?
• If an item of useful load located aft of an aircraft's center of gravity is removed, the center of gravity will move in which direction, all else equal?
• TCDS are issued for which products?
• Certificated mechanics, under their general certificate privileges, may perform 100 hour inspection of instruments.
• Which tool is used to find the center of a shaft or other cylindrical work?
• An aircraft with an empty weight of 1500 lb and EWCG of +28.4 inches is altered by removing two 12-lb seats at +68.5, adding +28-lb structural mods at +73, adding 30-lb seat at +70.5, and adding 25-lb radio at +85. What is the new empty weight CG?
• Which material is generally suitable for magnetic particle inspection?
• In a galvanic couple consisting of a steel fastener and an aluminum alloy plate in the presence of an electrolyte, which metal would corrode preferentially?
• Which statement concerning heat and temperature is true?
• If more space is needed for a work description on FAA Form 337, what information should be included on the attached sheet(s) in addition to the rest of the work description?
• Water break testing is conducted to verify which condition?
• Which statement about weld normalization is true?
• Which equation correctly defines the work done by a force moving through a distance?
• Which of the following inspections may be performed by a certificated airframe and powerplant mechanic for the purpose of returning an aircraft to service?
• Why is a mechanic applicant issued a temporary certificate after successful completion of the required tests?
• Intergranular corrosion may not be detectable even by careful visual inspection.
• Many areas of aviation have shifted their focus from eliminating error to
• According to Bernoulli's principle, what happens to the fluid pressure at a point where velocity increases?
• The voltage across the external 2 Ω load when the battery delivers 10 A is:
• In Alclad 2024-T4, the surface layer is made of which material?
• Bolts with a cross or asterisk on the bolt head indicate which type of bolts?
• What is the maximum duration of a temporary airman certificate?
• How do winglets at the wingtips primarily affect aircraft performance?
• Flattening of tubing in bends should not exceed what percentage of the original diameter?
• A voltmeter connected across the entire powered circuit should read
• Which statement about bonded clamps and tubing is true?
• Weathervaning tendency is greatest when taxiing which configuration?
• What determines the amount of current which will flow through a battery while it is being charged by a constant voltage source?
• If the cathodic surface area is increased relative to the anodic surface area, what happens to the corrosion rate of the anodic metal?
• In orthographic projection, which description is most accurate?
• An aircraft bolt has overall length 1-1/2 inches, shank length 1-3/16 inches, and threaded portion length 5/8 inch. What is the grip length?
• The flare angle required for aluminum tubing used with AN fittings is which degree value?
• The measurements showing the ideal or 'perfect' sizes of parts on drawings are called
• Jet fuel number identifiers are best described as
• Tempering steel after hardening serves to relieve internal stresses and reduce brittleness.
• Select the decimal which is most nearly equal to 77/64
• What is 64 cubed?
• An airplane wing is designed to produce lift resulting from
• The amount of electricity a capacitor can store is directly proportional to the plate area and inversely proportional to the distance between the plates. Which option best expresses this relationship?
• What is the simplest ratio of 65 units to 80 units?
• What is generally used in the construction of aircraft engine firewalls?
• In a hydraulic scenario with a 3 in^2 piston and a 2 in^2 rod on the rod side, at 3000 psi, what is the retracting force?
• Which action is performed to prevent slippage during the tubing flare forming?
• Which statement is true regarding the use of FAA Form 337?
• Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?
• When capacitors are connected in parallel, the total capacitance is
• Which publication would you consult for standards on protrusion of bolts, studs, and screws through self-locking nuts?
• Certificated mechanics with an airframe rating may perform a minor repair to which instrument, provided they have the necessary equipment?
• A rectangular shaped fuel tank measures 2 feet in width, 3 feet in length, and 1' 8" in depth. How many gallons will it hold?
• Which term describes the product of an item's weight and its distance from the datum?
• What should be clearly indicated on the aircraft weighing form?
• Which statement describes Form 337’s applicability to foreign registered aircraft?
• In a parallel circuit with four equal resistors powered by 24 V and delivering 48 W total, what is the resistance of each resistor?
• Under general certificate privileges, 100 hour inspections may be performed on which component?
• In an NPN transistor, the device turns on when the base is:
• Which regulation provides the airworthiness standards for an airplane certificated in the normal category?
• What is the status of data used as a basis for approving major repairs or alterations for return to service?
• During an annual inspection, if a defect is found which makes the aircraft unairworthy, the disapproving must
• What is the voltage across each resistor in a parallel circuit of four identical resistors connected to a 24 V source?
• How much power must a 24 volt generator furnish to a system which contains the following loads? 1 motor 1/5 HP, 3 lights 20 watts each, heating element 5 amp, anticollision light 3 amp
• Which of the following describes a permissible action for a certificated powerplant mechanic regarding propeller repairs?
• Which maintenance action is an airframe major repair?
• To convert farads to microfarads, you multiply by
• If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?
• In an AC circuit, the working voltage rating of a capacitor should be at least what percentage greater than the highest applied voltage?
• Detonation yields which engine behavior?
• How can the dimensional inspection of a bearing in a rocker arm be accomplished?
• What material symbol is frequently used in drawings to represent all metals?
• In an AC circuit, unless otherwise specified, voltages and currents are assumed to be
• In helicopter weight and balance, lateral axis CG control is ordinarily not a factor.
• Which statement about minor alterations and return to service is true?
• What is the ratio of a gasoline fuel load of 200 gallons to 1,680 pounds in simplest terms?
• Which formula correctly computes the surface area of a cube with side length s?
• Which line type is used to show an edge that is not visible?
• Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?
• Which nondestructive testing method uses magnetic particles to reveal flux leakage around discontinuities?
• Which unit is typically used to express the CG location on small aircraft?
• When two resistors are connected in parallel to a voltage source, the voltage across each resistor is the same as the source voltage.
• If you double the resistance while holding the voltage constant, what happens to the power dissipated?
• A hydraulic tubing damaged in a localized area may be repaired by which method?
• Which option best describes the effects of annealing steel and aluminum alloys?
• What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round conditions?
• When inductors are connected in series, the total inductance is
• A hot start during starting of a turbine power plant is most likely caused by which of the following?
• When taxiing or towing an aircraft, a flashing red light from the control tower means
• Who issues a Technical Standard Order (TSO)?
• How is a flooded engine, equipped with a float-type carburetor, cleared of excessive fuel?
• In the series circuit described earlier across 30 V with a 10-ohm resistor in series with a 20-ohm resistor, what is the current?
• A record entry describing a repair to a buckled spar using a figure from the structural repair manual would be documented on which form?
• Which statement best describes a major airframe repair or major alteration by a certificated mechanic with appropriate rating?
• Which statement is true about energy content per unit volume when comparing kerosene to gasoline?
• The electrolyte of a nickel-cadmium battery is highest when the battery is in which state?
• The twist of a connecting rod is checked by installing push fit arbors in both ends, supported by parallel steel bars on a surface plate. Measurements are taken between the arbor and the parallel bar with a
• A 24-volt motor of 1/5 horsepower operating at 75 percent efficiency requires approximately how many watts of electrical input power?
• Improper loading of a helicopter resulting in exceeding either fore or aft CG limits is hazardous due to the which effect?
• Alclad consists of aluminum with what structure?
• What term describes marks that indicate the surface should be machined to a specified finish?
• In circuits, the ground reference is best described as:
• Unbonded clamps are used for support when installing which component?
• If all, or a significant part of a stall strip is missing on an airplane wing, a likely result will be
• A group of bits representing a complete piece of information is called.
• Which item is NOT considered approved data for maintenance activities?
• Should measurements be scaled from a blueprint?
• The speed of sound in air is most affected by variations in which factor?
• Alclad is a metal consisting of
• During a rearward weight and balance check, the items of useful load that should be computed at minimum weights are those located forward of what boundary?
• Which tool is typically used to locate the center of a cylindrical workpiece by marking reference points around its circumference?
• An engine of 98 horsepower maximum is running at 75 percent power. What is the horsepower being developed?
• A hung start in a jet engine is often caused by
• The voltage drop in a circuit of known resistance is dependent on
• One may distinguish grades 100 and 100LL by
• What is an advantage of a double flare on aluminum tubing?
• What is the basic unit of electrical quantity?
• Which guideline best describes bolt grip length relative to material thickness in general practice?
• Which option represents the vernier scale graduation of a micrometer?
• How much work is required to lower a 120-pound weight from the top of a 3-foot table to the floor?
• Which is classified as a major repair?
• A rectangular fuel tank measures 60 inches by 30 inches by 12 inches. How many cubic feet are inside the tank?
• What does the moment represent in weight and balance calculations?
• If 60 gallons cover 750 miles, how many gallons are needed to cover 1500 miles?
• For a carburetor or intake fire, which extinguishing agent is most satisfactory?
• A fuel that vaporizes too readily may cause which problem in aircraft systems?
• Which condition may not be detectable even by careful visual inspection of the surface of aluminum alloy parts or structures?
• What is the essential first step when sketching a part for manufacturing?
• Which best describes the characteristics of aviation gasoline?
• In a hydraulic cylinder, if the piston area is 1.2 square inches and the fluid pressure is 850 psi, what is the force exerted on the piston?
• Why is a level flight condition used when obtaining useful CG weight data?
• A 1 HP, 24 volt DC electric motor that is 80 percent efficient requires 932.5 watts. How much power will a 1 HP, 12 volt DC electric motor that is 75 percent efficient require?
• The positive aspects of human factor issues are referred to as the
• After long storage, a nickel-cadmium battery shows a low liquid level. Which explanation is most consistent with this observation?
• What information is generally contained in Aircraft Specifications or TCDS?
• Where is the datum line typically located relative to the aircraft nose?
• Which of the following are commonly used as rectifiers in electrical circuits?
• What is the piston displacement of a master cylinder with a bore of 1.5 inches and a piston stroke of 4 inches?
• What does a discrepancy list after an inspection imply about airworthiness?
• The empty weight of an airplane is determined by which method?
• One billion is equal to 10 to the power of how many?
• Detail drawings are described as which of the following?
• Which nondestructive testing method is best suited for detecting surface-breaking cracks in aluminum forgings?
• Which tubing material is specified for its combination of high strength and abrasion resistance for 3000 PSI hydraulic systems?
• Fillet weld penetration is typically specified as a percentage of base metal thickness.
• The potential difference between two insulated conductors is measured in what units?
• Maximum life for a certain part is 1100 hours. Recently, 15 parts were removed with an average life of 835.3 hours. What percent of the maximum life has the average achieved?
• Which maintenance record entry best describes the action taken for a control cable showing approximately 20 percent wear on several of the individual outer wires at a fairlead
• The hazard distance behind an idling turbine engine is approximately how far?
• The 100 hour inspection required by the FAA regs for certain aircraft being operated for hire may be performed by
• Which inspection requires an Inspection Authorization to perform?
• Mixing aviation gasoline with jet fuel in a turbine engine can lead to deposits due to tetraethyl lead on which part?
• Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?
• .002 KV equals
• Technical information about older aircraft models, with no more than 50 remaining in service, can be found in which listing?
• In a hydraulic system, if the fluid pressure is 8010 PSI and the piston area is 10 square inches, the force exerted on the piston will be
• Which document would you consult to authorize installation of a major modification that deviates from the original design?
• Which procedure provides the empty weight if weight and balance records are inaccurate?
• In mechanical drawings, which line type is used to represent an edge not visible to the viewer?
• If both volume and the absolute temperature of a confined gas are doubled, the pressure will
• Which trio correctly lists the three types of human error?
• Valve mechanism inspections—at what interval are the subsequent inspections performed after the initial 25 hours?
• Tetraethyl lead is added to aviation gasoline to
• Phantom lines in technical drawings are used to convey which concept?
• Which statement is true regarding the requirements for maintenance record format?
• When approaching the rear of an idling turbojet or turbofan engine, the hazard area extends aft of the engine approximately how many feet?
• Corrosion should be removed from magnesium parts with a
• How long are AD compliance records required to be kept?
• If a flared tube coupling nut is over tightened, where is the tube most likely weakened?
• In a dye penetrant inspection, the developer's primary role is to
• What is the total resistance of four 6-ohm resistors in parallel?
• What is used to indicate that a surface must be machine finished?
• Long-term storage of nickel-cadmium batteries often results in a low liquid level because what happens to the electrolyte?
• The signature of an authorized person on the maintenance records for maintenance and alterations performed constitutes
• The inside dimension of 3/4 in 0.072 5052-0 aluminum alloy tubing is 0.606 inch. Which of the following is true about this measurement?
• When calculating power in a reactive or inductive AC circuit, the true power is
• Which statement is generally true regarding the charging of several aircraft batteries together?
• AD compliance records retention: Which statement is true regarding the handling of these records upon sale?
• In the 4-digit aluminum index system number 2024, the first digit indicates?
• Why should an aircraft maintenance technician be familiar with weld nomenclature?
• What is 10 raised to the power of -6 in decimal form?
• Which symbol on a bolt head indicates a NAS close tolerance bolt?
• In the 4-digit aluminum index system, what does the first digit indicate? (restate concept)
• The datum location for weight and balance is specified in which document?
• Which material property is necessary for high-pressure hydraulic lines used in aircraft landing gear and flaps?
• An aircraft loaded weighs 4954 lbs at a CG of +30.5 inches. The CG range is +32.0 inches to +42.1 inches. Find the minimum ballast weight needed to bring the CG within range. The ballast arm is +162 inches.
• If a hydraulic system has a line pressure of 1200 psi and a piston area of 6 square inches, what is the force on the piston?
• When we think of aviation safety in a contemporary way, human error is
• Which is an appliance major repair?
• Evaluate (64 × 3/8) ÷ (3/4).
• Which magnetization methods are commonly used in magnetic particle inspection to reveal defects at different orientations?
• A pinion gear with 14 teeth drives a spur gear with 42 teeth at 140 RPM. Determine the speed of the pinion gear?
• For aircraft operated under part 91, when is aircraft total time required to be recorded in aircraft maintenance records?
• What is the speed ratio of an input gear with 36 teeth meshed to a gear with 20 teeth?
• The opposition offered by a coil to the flow of alternating current, ignoring resistance, is called?
• What is the thread size of the heli-coils mentioned for replacement in the recording example?
• The side clearance of piston rings are measured with a
• A hole of 0.17187 inches is to be drilled. Which fraction size is most nearly equal?
• During ground starting of an aircraft engine, the aircraft should be positioned to face into the wind primarily for what purpose?
• Which statement about discontinuities in nondestructive testing is true?
• Placards required on an aircraft are specified in which documents?
• In magnetic particle inspection, fatigue cracks are identified when the discontinuity is located in which area of the part?
• In a parallel circuit with four 6-ohm resistors across a 24-volt battery, what is the voltage across resistor 3?
• Which statement about electrical resistance is correct?
• What term describes the combined resistive and reactive effects in an AC circuit?
• Under what condition could certificated mechanics perform and approve propeller work under an AD?
• An installation of an item manufactured in accordance with the TSO system requires no further approval for installation in a particular aircraft.
• Regarding demagnetization of an aircraft part, which statements are true?
• The temporary certificate serves to:
• What is the purpose of the ground symbol in electrical circuit diagrams?
• The priming of a fuel-injected horizontally opposed engine is accomplished by placing the fuel control lever in which position?
• Which statement is true regarding helicopter weight and balance?
• When towing a large aircraft, which safety action is correct?
• Which gauge is used to measure a hole diameter by reading the ball end of the gauge with a micrometer?
• Which document identifies the approved data and restrictions for a specific aircraft model and is used to determine maintenance data applicability?
• What may be used to check the stem on a poppet type valve for stretch?
• If a 40 lb generator applies +1400 inch-pounds to the reference axis, the generator is located at:
• When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to
• Using the given hoist scenario, what is the work input required to move the hoist horizontally 12 feet with a constant force of 70 pounds?
• Which feature is characteristic of AN flare fittings?
• According to Dr. James Reason, there are two types of human failure that can occur. They are:
• A hydraulic actuator has a fluid pressure of 400 psi acting on a piston area of 5 square inches. What is the force on the piston?
• A dimension on a blueprint is given as 4.387 inches +.005/-.002. Which statement is true?
• Under 14 CFR Part 23, the oil contained in the supply tank is considered a part of the empty weight.
• After making a repair to an aircraft engine that is to be returned to service, an FAA Form 337 is prepared. How many copies are required and what is the disposition of the completed forms?
• Compared with a low aspect ratio wing, a very high aspect ratio wing will have:
• Which method generally yields the highest degree of aircraft leveling accuracy?
• The maximum distance between end fittings to which a straight hose assembly is to be connected is 50 inches. The minimum hose length to make such a connection should be?
• One way of obtaining increased resistance to stress corrosion cracking is by creating compressive stresses (via shot peening) on the metal surface.
• Which condition indicates a part has cooled too quickly after being welded?
• What is the electrical input power for a 0.5 HP device?
• Under which condition will the rate of flow of a liquid through a metering orifice be greatest?
• The purpose of providing a space underneath the plates in a lead-acid battery's cell container is to
• A 6 cylinder engine with a bore of 3.5 inches, a height of 7 inches, and a stroke of 4.5 inches will have a total piston displacement of
• Which of the following statements about measurements and drawings is true?
• In the SHEL model, the goal is to determine not only what the problem is, but also where and why it exists.
• The electrolyte of a nickel-cadmium battery is at its lowest when the battery is in which state?
• FAA Form 337 is primarily used to record and document which of the following?
• Which statement about phantom lines is true?
• What tool is generally used to calibrate a micrometer or check its accuracy?
• What is the recommended tool for cutting aluminum tubing?
• When a discrepancy list is provided to an aircraft owner or operator after an inspection, it says in effect that
• How is wing aspect ratio defined?
• Which statement about minor alterations is true for certificated mechanics who performed them?
• What is the purpose of a thermal switch (thermal protector) in an electric motor?
• The testing medium generally used in magnetic particle inspection utilizes a ferromagnetic material that has which combination of properties?
• How many amperes will a 28 volt generator be required to supply to a circuit containing 5 lamps in parallel, 3 of which have a resistance of 6 ohms each and 2 of which have a resistance of 5 ohms each?
• Which tool is commonly used to detect misalignment in rotor shafts by comparing to a reference plane?
• Which setting should be used to prevent unintended nose wheel movement during towing of a steerable aircraft?
• If the fluid pressure is 800 PSI and the piston area is 10 square inches, the force exerted on the piston will be
• For an outside dimension specified as 1.0625 +.0025/-.0003 inches, what is the total tolerance width?
• Why is it important not to rotate the crankshaft after the corrosion preventative mixture has been put into the cylinders on engines prepared for storage?
• Which aircraft record entry best describes the action taken for the replacement of several damaged heli-coils in a casting?
• When weighing an aircraft with full fuel tanks, which fuel quantity is not subtracted from the scale readings?
• What power of 10 equals 1,000,000,000?
• Which document is typically used to authorize a major modification to the original type design?
• What is the permissible maximum percentage of flattening for tubing in bends?
• Who is responsible for determining that materials used in aircraft maintenance and repair are of the proper type and conform to the appropriate standards?
• Which statement is true regarding corrosion prerequisites?
• What is the square root of 1746 to four decimal places?
• What is the normal duration a mechanic certificate with airframe and/or powerplant ratings?
• Which testing method uses a liquid to reveal surface-breaking defects on non-porous materials?
• How is a clevis bolt with a fork-end cable terminal secured?
• An aircraft owner was provided a list of discrepancies on an aircraft that was not approved for return to service after an annual inspection. Which of the following statements is/are true concerning who may correct the discrepancies?
• Aircraft bolts are usually manufactured with a which fit for the threads?
• Which wiping cloth is NOT acceptable to use when utilizing chemical cleaning agents on aircraft?
• What tool is generally used to set a divider to an exact diameter?
• The term for one-thousandth of an ampere is
• What tasks are completed prior to weighing an aircraft to determine its empty weight?
• How can the state-of-charge of a nickel-cadmium battery be determined?
• How many gallons are contained in a tank with 4331.25 cubic inches of volume?
• Which document records maintenance performed on an aircraft?
• After an aircraft engine has been shut down for more than 30 minutes, the propeller should be rotated to check for hydraulic lock. How many revolutions are recommended?
• The drawings often used in illustrated parts manuals are which type of drawing?
• During engine start on the ground, facing the wind primarily helps with engine cooling. Which option best describes this practice?
• Which statement describes the correct priming position for a fuel-injected engine?
• Under FAA Regulations, maintenance must ensure the airframe is at least equal to its original properly altered condition.
• Zone numbers on aircraft blueprints are used to locate parts, sections, and views on large drawings.
• FAA Form 337 is used to document what type of work?
• Under Title 14 of the CFR, what is the maximum penalty for falsification, alteration, or fraudulent reproduction of certificates, logbooks, reports, and records?
• The presence of any small amount of potassium carbonate deposits on the top of nickel-cadmium battery cells in service is an indication of
• Subsequent valve mechanism inspections will be made at which interval after the initial 25-hour inspection?
• Galvanic corrosion is most likely to occur at the interface of a steel fastener and an aluminum alloy inspection plate in the presence of an electrolyte.
• Which combination of instruments is used to perform the dimensional inspection of a rocker-arm bearing?
• If the volume of a confined gas is doubled while the temperature remains constant, what happens to the pressure?
• What is the recommended action if a weld shows holes and projecting globules?
• What is the volume in cubic inches of a rectangular prism with dimensions 2 feet by 3 feet by 1 2/3 feet?
• Which term describes the actual amount of water vapor in a mixture of air and water?
• Express 7/8 as a percent.
• If three resistors 3 ohms, 5 ohms, and 22 ohms are connected in series in a 28 volt circuit, how much current will flow through the 3 ohm resistor?
• Which action best describes the purpose of two-piece tube connectors (sleeve and nut flare)?
• Which method is not used to clean magnesium engine parts?
• The end-of-charge voltage of a 19-cell nickel-cadmium battery measured while on charge depends upon which factors?
• In the reading of aircraft blueprints, the term "tolerance" used in association with aircraft parts or components, is the
• Who must approve data used for major repairs before it can be used for return to service?
• Which sequence correctly describes clearing a flooded float-type carburetor engine?
• For aircraft operated under Part 91, which AD-related information must accompany the aircraft when it is sold?
• A gas or fluid line marked with the letters PHDAN is used to carry what kind of substance?
• Which term describes a non-electrolytic chemical treatment for aluminum alloys to increase corrosion resistance and paint-bonding qualities?
• From the 60 gallons for 750 miles scenario, what is the consumption rate in gallons per mile (to two decimals)?
• Generally, when an induction fire occurs during starting of a reciprocating engine, the first course of action should be to:
• A complete detailed inspection and adjustment of the valve mechanism will be made at the first 25 hours after the engine has been placed in service. At what time after engine placement in service is the first valve mechanism inspection performed?
• Which statement about Military Standard (MS) flareless fittings is/are correct?
• What results from repeated mechanical work at room temperature?
• When using a sketch to make a part, which statement is applicable?
• A spur gear with 42 teeth is driven by a pinion with 14 teeth turning 420 RPM. What is the speed of the driven gear?
• The term 'maximum weight' in weight and balance control refers to which of the following?
• Which tubings have the characteristics necessary for use in high-pressure 3000 PSI hydraulic system for operation of landing gear and flaps?
• TCDS stands for which document?
• In an AC circuit, the effective (RMS) voltage is
• The interior surface of sealed structural steel tubing would be best protected against corrosion by which of the following?
• A 4-cylinder aircraft engine has a cylinder bore of 3.78 inches, and is 8.5 inches deep. With the piston on BDC, the top of the piston is 4 inches from the bottom. What is the approximate total piston displacement of this engine?
• Fayed surfaces cause concern in chemical cleaning because of the danger of
• Which statement best describes the operating principle in a nickel-cadmium battery installed in an aircraft?
• Which statement describes the relationship of work, force, and distance when moving an object along the direction of motion?
• Which of these materials is the most anodic?
• During weight and balance procedures, which action is highlighted as affecting CG results?
• The radius of a piece of round stock is 7/32. Select the decimal most nearly equal to the diameter.
• In the designation '4130' for chromium molybdenum steel, the first digit indicates what aspect of the alloy?