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

Average tension of the tight side and slack side of the belt
Tension in the slack side of the belt
Tension in the tight 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
In order to give a complete secondary balance of a multi-cylinder inline engine,

Both (A) and (B)
The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero
None of these
The algebraic sum of the secondary forces must be equal to zero

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