Theory of Machine
The train value of a gear train is

Always less than unity
Always greater than unity
Equal to velocity ratio of a gear train
Reciprocal of velocity ratio of a gear train

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

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