Design Engineer Question:
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The rolling contact bearings as compared to sliding contact bearings have

A. small overall dimensions
B. accuracy of shaft alignment
C. low starting and low running friction except at very high speeds
D. all of the above

Answer:

Option D

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In a flange coupling, the thickness of flanges is taken as one-half the diameter of shaft.

A. Agree
B. Disagree
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

A. same
B. less
C. more