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What is the standard reference temperature for the measurement of the accuracy of vernier height gauges?

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What is the standard reference temperature for the measurement of the accuracy of vernier height gauges?

(a) 20 K

(b) 20^oC

(c) 40 K

(d) 40^oC

The question was asked by my school teacher while I was bunking the class.

My doubt is from Vernier Height Gauges in section Linear Measurements of Engineering Metrology

1 Answer

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Best answer
The correct choice is (b) 20^oC

The best I can explain: Temperature of 20^oC should be maintained in the room where the test is conducted. A height gauge should rest on a precision surface plate to increase the testing accuracy.

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