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551.

Stretching on a belt can be controlled by

A.	decreasing belt length	B.	decreasing stress in the belt
C.	decreasing belt velocity	D.	none of the above

552.

In a horizontal flat belt drive for power transmission it is customary to use

A.	bottom side of the belt as slack side	B.	top side of the belt as slack side
C.	crossed-belting	D.	none of the above

553.

Centrifugal tension in belts

A.	reduces power transmission	B.	increases power transmission
C.	does not affect power transmission	D.	none of the above