Question

Positive error in screw guage

Answer 1

when the of main scale is before the digit of free scale than positive zero error is found

Answer 2

Positive Zero Error in a Screw Guage :-

If the zero mark on the circular scale is below the line of graduation of the main scale, when there is no gap between the jaws of the screw Guage, the jaws of the screw Guage, the Zero Error is said to be Positive.

In such a situation, the measured length will be more than the actual length.

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