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The velocity of sliding __________ the distance of the point of contact from the pitch point.

A. is directly proportional to
B. is inversely proportional to
C. is equal to cos φ multiplied by
D. does not depend upon

Option A

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The ball bearings are provided with a cage A. to reduce friction B. to facilitate slipping of balls C. to prevent the lubricant from flowing out D. to maintain the balls at a fixed distance apart	A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called A. castle nut B. jam nut C. ring nut D. sawn nut