Design Engineer Question:
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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

Option D

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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	A crankshaft is a __________ shaft. A. transmission B. machine