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Theory of Machine

Theory of Machine
The example of higher pair is

Belt, rope and chain drives
Ball and roller bearings
Gears, cams
All of these

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)

v²BA
vBA × AB
vBA /AB
v²BA /AB

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Theory of Machine
Which of the following is an example of sliding 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
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt) + (s/m). x = 0. If the roots of this equation are real, then the system will be

Over-damped
Critically damped
Under damped
Without vibrations

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Theory of Machine
The stress induced in a body will be shear stress, when it is subjected to

Longitudinal vibrations
Transverse vibrations
Torsional vibrations
None of these

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Theory of Machine
When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.

Backward
Forward
Downward
Upward

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