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Which of the following is used for manufacturing of length bars?

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in Engineering Metrology by (829k points)
Which of the following is used for manufacturing of length bars?

(a) Hardened steel

(b) High carbon high chromium steel

(c) Tungsten carbide

(d) Ceramic

This question was addressed to me by my college director while I was bunking the class.

The doubt is from Slip Gauges topic in division Linear Measurements of Engineering Metrology

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The correct choice is (b) High carbon high chromium steel

The explanation is: Length bars are made from high carbon high chromium steel ensuring the hardness to 64RC.

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