21) Which instrument used to measure bore dia to an accuracy of 0.01mm?

Answer is:

Inside micrometer

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22) What is the least count of vernier caliper in metric system?

Answer is:

0.02 mm

What is the least count of vernier caliper in metric system?

23) Which part of vernier caliper used to measure internal and external measurement?

Answer is:

Movable jaw

Which part of vernier caliper used to measure internal and external measurement?

24) Which vice is used to hold a very small diameter job?

Answer is:

Pin vice

Explanation:

The pin vice is used for holding small diameter jobs. It consists of a handle and a small collet chuck at one end. The chuck carries a set of jaws which are operated by turning the handle.

Which vice is used to hold a very small diameter job?

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