Industrial Drivers MCQ Questions & Answers | Electrical Engineering

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1.
Rotor of a motor is usually supported on _________ bearings.

A. Ball or roller

B. Needle

C. Bush

D. Thrust

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2.
When the load is above _________ a synchronous motor is found to be more economical.

A. 2 kW

B. 20 kW

C. 50 kW

D. 100 kW

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3.
For derris and winches which of the following drives can be used?

A. Pole changing squirrel cage motors

B. D.C. motors with Ward-Leonard control

C. A.C. slip ring motors with variable resistance

D. Any of the above

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4.
Which of the following motors is preferred for traction work?

A. Universal motor

B. D.C. series motor

C. Synchronous motor

D. Three-phase induction motor

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5.
Belted slip ring induction motor is almost invariably used for

A. Water pumps

B. Jaw crushers

C. Centrifugal blowers

D. None of the above

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