A dimension on a blueprint is given as 4.387 inches +.005/-.002. Which statement is true?

A dimension on a blueprint is given as 4.387 inches +.005/-.002. Which statement is true?

• A. The maximum acceptable size is 4.390 inches
• B. The minimum acceptable size is 4.385 inches
• C. The minimum acceptable size is 4.382 inches
• D. The maximum acceptable size is 4.395 inches

Answer: (B)

Tolerance defines the range of acceptable sizes around the basic dimension. The given dimension is 4.387 inches with a tolerance of +0.005/−0.002, so the acceptable range runs from 4.387 − 0.002 to 4.387 + 0.005, i.e., from 4.385 inches to 4.392 inches. Therefore, the minimum acceptable size is 4.385 inches. The maximum should be 4.392 inches, so statements claiming 4.390 or 4.395 as the maximum aren’t correct. A size of 4.382 inches would be below the lower limit and rejected.

Tolerance defines the range of acceptable sizes around the basic dimension. The given dimension is 4.387 inches with a tolerance of +0.005/−0.002, so the acceptable range runs from 4.387 − 0.002 to 4.387 + 0.005, i.e., from 4.385 inches to 4.392 inches. Therefore, the minimum acceptable size is 4.385 inches. The maximum should be 4.392 inches, so statements claiming 4.390 or 4.395 as the maximum aren’t correct. A size of 4.382 inches would be below the lower limit and rejected.