Question

What is positive zero error in screwgauge?

Answer 1

Answer:

(i) Positive Error: When the two jaws are in contact and the zero of the vernier lies right to the zero of the main scale, the error is positive and the zero correction is negative. Screw gauge: To the head H of the screw is attached a sleeve S, whose edge is divided usually into 50 or 100 equal divisions.

Explanation:

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Answer 2

Answer:

if the zero of the head scale lies below the pitch scale axis, the zero error is positive.