Theory of Machine
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

Lead
None of these
Steam lap
Exhaust lap

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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

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
Tension in the tight side of the belt

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