What term describes marks that indicate the surface should be machined to a specified finish?

What term describes marks that indicate the surface should be machined to a specified finish?

• A. Finished marks
• B. Datum marks
• C. Leader lines
• D. Cross-hatching

Answer: (A)

Marks that specify how smooth or rough a surface must be are about the finish of a part. These finish marks guide the machinist to perform finishing operations to reach a defined surface quality, often shown with a symbol and a roughness value. They ensure the surface meets the intended texture for proper function, fit, and appearance. In contrast, datum marks are used to establish reference features for locating other features, leader lines simply connect notes to a feature, and cross-hatching indicates a section cut or material pattern rather than finish requirements. So the term for marks indicating the surface should be machined to a specified finish is finished marks.

Marks that specify how smooth or rough a surface must be are about the finish of a part. These finish marks guide the machinist to perform finishing operations to reach a defined surface quality, often shown with a symbol and a roughness value. They ensure the surface meets the intended texture for proper function, fit, and appearance. In contrast, datum marks are used to establish reference features for locating other features, leader lines simply connect notes to a feature, and cross-hatching indicates a section cut or material pattern rather than finish requirements. So the term for marks indicating the surface should be machined to a specified finish is finished marks.