Question

how is the zero error of a screw determined​

Answer 1

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★ To avoid error, first one must know whether the screw in question is fractional or metric in size.

★ This would most simply be determined with a dial caliper.

★ Screws are manufactured to extremely close tolerances, and even with a fractional caliper, one can determine whether the screw is sized fractionally or metric.

Answer 2

Answer:

by seeing the zero of spring

Explanation:

in zero error the spring is not in zero