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Theory of Machine

Theory of Machine
The periodic time of one oscillation for a simple pendulum is

2π. √(l/g)
2π. √(g/l)
(1/2π). √(l/g)
(1/2π). √(g/l)

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Theory of Machine
The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

To raise the bow and lower the stern
To raise the bow and stern
To lower the bow and stern
To raise the stern and lower the bow

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W cosθ
W sinθ
W tanθ
W cosecθ

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Theory of Machine
A universal joint is an example of

Lower pair
Rolling pair
Higher pair
Sliding pair

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Theory of Machine
Whirling speed of the shaft is the speed at which

Shaft tends to vibrate vigorously in transverse direction
Shaft tends to vibrate in longitudinal direction
Torsional vibrations occur
Combination of transverse and longitudinal vibration occurs

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Theory of Machine
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.

Whole
Two-third
One-half
Three-fourth

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