Important Industrial Drive Multiple Choice Questions and Answers

36.  For which of the following applications motor has to start with high acceleration?

   A. Oil expeller

   B. Floor mill

   C. Lifts and hoists

   D. Centrifugal pump

37.  The characteristics of drive for crane hoisting and lowering are which off the following?

   A. Precise control

   B. Smooth movement

   C. Fast speed control

   D. All of the above

38.  In ........the speed can be varied by changing the position of brushes

   A. Slip ring motor

   B. Schrage motor

   C. Induction motor

   D. Repulsion motor

39.  In which of the following applications variable speed operation is preferred?

   A. Exhaust fan

   B. Ceiling fan

   C. Refrigerator

   D. Water pump

40.  The travelling speed of cranes varies from from

   A. 20 to 30 m/s

   B. 10 to 15 m/s

   C. 5 to 10 m/s

   D. 1 to 2.5 m/s

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