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Theory of Machine

Theory of Machine
The cam and follower is an example of

Lower pair
Higher pair
Rolling pair
Sliding pair

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

1.4 N-s/m
52.92 N-s/m
18.52 N-s/m
529.2 N-s/m

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Theory of Machine
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is

Fc = ar
Fc = a/r + b
Fc = ar + b
Fc = ar - b

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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

0.4
0.6
0.8
0.2

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Theory of Machine
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from

80°- 90°
60°-70°
70°- 80°
50°- 60°

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Theory of Machine
The periodic time of a compound pendulum is __________ when the distance between the point of suspension and the center of gravity is equal to the radius of gyration of the body about its center of gravity.

Maximum
Minimum
Zero
None of these

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