Which of the following is a turning pair?

1.	Which of the following is a turning pair?
A.	Piston and cylinder of a reciprocating steam engine
B.	Shaft with collars at both ends fitted into a circular hole
C.	Lead screw of a lathe with nut
D.	Ball and a socket joint
Answer» C. Lead screw of a lathe with nut

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Which of the following is a turning pair?

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