If the correctness of profile of a thread is to be checked which instrument would you choose?
A)Screw pitch gauge
B)Telescopic gauge
C)Optical projector
D)Sine bar
E)Bench micrometer

Question

Quizplus · Accepted Answer

An optical projector, specifically a profile projector or optical comparator, is the correct instrument for checking the correctness of the profile of a thread. It magnifies the profile of the thread onto a screen for detailed examination, allowing for precise measurement and inspection of the thread's shape and dimensions.

If the Correctness of Profile of a Thread Is to Be