Theory of Machine
The maximum fluctuation of speed is the

Variations of speed above and below the mean resisting torque line
Difference of the maximum and minimum speeds
Difference of minimum fluctuation of speed and the mean speed
Sum of maximum and minimum speeds

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Theory of Machine
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the

Tension in the tight side of the belt
Average tension of the tight side and slack side of the belt
Tension in the slack side of the belt
Sum of the tensions on the tight side and slack side of the belt

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Theory of Machine
A body is said to be under forced vibrations, when

None of these
A body vibrates under the influence of external force
No external force acts on a body, after giving it an initial displacement
There is a reduction in amplitude after every cycle of vibration

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