M

Mr. Dubey • 52.30K Points
Coach 

Q. What is the maximum permissible error in wear of centres?

(A) 0.04 mm
(B) 0.03 mm
(C) 0.02 mm
(D) 0.01 mm
Correct : Option (D)

Explanation: 
 the centres are set and checked for straightness. it can be observed while rotating the centres. the maximum error permissible for wear of centres is 0.01 mm.

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