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Theory of Machine

Theory of Machine
Which of the following is an open pair?

Lead screw and nut
Cam and follower
Journal bearing
Ball and socket joint

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Theory of Machine
The frictional torque transmitted by a cone clutch is same as that of

Truncated conical pivot bearing
Conical pivot bearing
Flat collar bearing
Flat pivot bearing

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Theory of Machine
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links

Will remain same
Will not occur
Will change
Could change or remain unaltered depending on which link is fixed

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

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Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

30
20
34
10

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Theory of Machine
The height of a Watt's governor is

Inversely proportional to speed
Directly proportional to speed
Directly proportional to (speed)²
Inversely proportional to (speed)²

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