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
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C. Lifts and hoists
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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
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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
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39. In which of the following applications variable speed operation is preferred?
A. Exhaust fan
B. Ceiling fan
C. Refrigerator
D. Water pump
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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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