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Theory of Machine

Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.8
0.4
0.6
0.2

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Theory of Machine
If the opposite links of a four bar linkage are equal, the links will always form a

Parallelogram
Pentagon
Rectangle
Triangle

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Theory of Machine
The velocity of a body moving with simple harmonic motion is __________ at the mean position.

Zero
None of these
Maximum
Minimum

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Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Roller cam mechanism
Five link mechanism
Slider crank mechanism
Kinematic chain

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Theory of Machine
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

Both governors A and B are equally sensitive
Governor A is more sensitive than governor B
None of these
Governor B is more sensitive than governor A

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Theory of Machine
A universal joint is an example of

Sliding pair
Rolling pair
Higher pair
Lower pair

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