Theory of Machine
Which of the following is a turning pair?

Lead screw of a lathe with nut
Shaft with collars at both ends fitted into a circular hole
Piston and cylinder of a reciprocating steam engine
Ball and a socket joint

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Theory of Machine
A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force

The reaction on the front wheels increases and on the rear wheels decreases
The reaction on the outer wheels increases and on the inner wheels decreases
The reaction on me inner wheels increases and on the outer wheels decreases
The reaction on the rear wheels increases and on the front wheels decreases

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