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Theory of Machine

Theory of Machine
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

2E²CS
2ECS
EC S/2
2ECS²

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Theory of Machine
Which of the following is a pendulum type governor?

Porter governor
None of these
Watt governor
Hartnell governor

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Theory of Machine
The frequency of oscillation at compared to earth will be

2.44 times less
6 times less
6 times more
2.44 times more

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Theory of Machine
A shaft carrying two rotors at its ends will have

No node
Two nodes
One node
Three nodes

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

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

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Theory of Machine
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

More sensitive
Unaffected of sensitivity
Isochronous
Less sensitive

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