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19. What do you mean by zero error of a screwgauge ? How is it accounted for? |
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Answer» Answer: zero error means many instruments do not read zero exactly when there is nothing behind USED. THE REASONS FOR ZERO ERROR ARE:1.INSTRUMENTS ARE OUT OF ADJUSTMENT DUE TO USAGE OF LONG TIME 2.SOME MIRROR FAULT PRESENT IN INSTRUMENT DURING MANUFACTURE |
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