Idler pulley is used

A. For changing the direction of motion of the belt

B. For applying tension

C. For increasing velocity ratio

D. All of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The ratio of maximum fluctuation of speed to the mean speed is called
  2. When the two elements of a pair have __________ when in motion, it is said to a lower pair.
  3. The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane…
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  14. In railway axle boxes, the bearing used is
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  18. Instantaneous center of rotation of a link in a four bar mechanism lies on
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  20. The Klein's diagram is used when
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  24. The factor which affects the critical speed of a shaft is
  25. The acceleration of the reciprocating roller follower when it has contact with the straight flanks of…
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  28. The minimum force required to slide a body of weight W on a rough horizontal plane is
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