Theory of Machine
Which of the following is an example of sliding pair?

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

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Theory of Machine
A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will

Remain same as before
Become equal to R/2
Become equal to R/4
Become equal to 2R

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Theory of Machine
A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will

Become equal to R/4
Become equal to R/2
Remain same as before
Become equal to 2R

ANSWER DOWNLOAD EXAMIANS APP