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

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Theory of Machine
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?

All points of the disc have the same velocity
The point on the disc making contact with the plane surface has zero acceleration
The centre of the disc has zero acceleration
The centre of the disc has centrifugal acceleration

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Theory of Machine
Effort of a governor is the

Work-done at the sleeve for maximum equilibrium speed
Mean force exerted at the sleeve for maximum equilibrium speed
Mean force exerted at the sleeve for a given percentage change of speed
None of these

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