Backlash error is present in

Vernier callipers

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Screw-Gauge and Vernier callipers

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Screw – Gauge

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Vernier calipers and Spherometer

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Solution

Correct option is (D) All of the above
Backlash error also called as play or lash (by mechanical engineers) is mostly encountered when we try to move the instrument back and forth rapidly i.e. when we are changing direction of motion of the instrument. Backlash error is present in Vernier calipers, screw gauge and Spherometer.

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