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Theory of Machine

Theory of Machine
A ball and a socket forms a

Screw pair
Turning pair
Rolling pair
Spherical pair

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Theory of Machine
The rotating shafts tend to vibrate violently at whirling speeds because

Bearing centre line coincides with the axis
The shafts are rotating at very high speeds
Resonance is caused due to the heavy mass of the rotor
The system is unbalanced

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Theory of Machine
When a point at the end of a link moves with constant angular velocity, its acceleration will have

Tangential component only
Radial and tangential components both
Radial component only
Coriolis component only

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Theory of Machine
In higher pair, the relative motion is

Purely sliding
Purely rotary
Purely turning
Combination of sliding and turning

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Theory of Machine
The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is

44082
30195
9/128
44090

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Theory of Machine
Under logarithmic decrement, the amplitude of successive vibrations are

In geometric progression
In arithmetic progression
In logarithmic progression
Constant

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MORE MCQ ON Theory of Machine

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