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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

Option C

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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	The application of third type levers is found in A. handle of a hand pump B. hand wheel of a punching press C. lever of a loaded safety valve D. a pair of tongs