Question

which of the following statements is true of telescoping gauges? a) they only give approximate measurements (± 0.5 mm) b) they need to be centered to give an accurate measurement of an inside diameter c) they produce actual readings up to 25 mm d) they should never be used with an outside micrometer

Explanation:

Telescoping gauges need to be centered to accurately measure an inside - diameter. They are not approximate within ± 0.5 mm, don't have a limit of 25 mm for actual readings, and can be used with an outside micrometer to get the measurement value.

Answer:

B. They need to be centered to give an accurate measurement of an inside diameter