Question 507General Subjects - Assistant Engineer

The correct answer is C. The device labeled C in the illustration GS-0073 is designed for both inside and outside measurements. This type of instrument, commonly known as a caliper, can be used to accurately measure the dimensions of objects both externally and internally. Calipers have jaws that can extend to take inside measurements as well as a depth rod that can be used for depth measurements. The other devices shown, A, B, and D, are specialized for different types of measurements, but do not have the dual inside/outside capability of the caliper.