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

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Theory of Machine
The maximum fluctuation of speed is the

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

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Theory of Machine
Inertia force acts

Opposite to the direction of acceleration force
Perpendicular to the acceleration force
None of the listed here
Along the direction of acceleration force

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