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Light duty cranes are used in which of the following?

A) Power houses B) Pumping stations C) Automobile workshops D) All of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The diameter of the rotor shaft for an electric motor depends on which of the following?

A) r.p.m. only B) Horse power only C) Horse power and r.p.m. D) Horse power, r.p.m. and power factor

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In case of __________ speed control by injecting e.m.f. in the rotor circuit is possible,

A) D.C. shunt motor B) Schrage motor C) Synchronous motor D) Slip ring induction motor

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which of the following motors is preferred when smooth and precise speed control over a wide range is desired?

A) D.C. motor B) Squirrel cage induction motor C) Wound rotor induction motor D) Synchronous motor

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The selection of an electric motor for any application depends on which of the following factors?

A) Electrical characteristics B) Mechanical characteristics C) Size and rating of motors D) All of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

By the use of which of the following D.C. can be obtained from AC.?

A) Silicon diodes B) Mercury arc rectifier C) Motor generator set D) Any of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which of the following is essentially needed while selecting a motor?

A) Pulley B) Starter C) Foundation pedal D) Bearings

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Short time rated motors are preferred for overhead traveling cranes

A) True B) False

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Reluctance motor is a

A) Variable torque motor B) Low torque variable speed motor C) Self starting type synchronous motor D) Low noise, slow speed motor

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Which of the following types of motor enclosure is safest?

A) Totally enclosed B) Totally enclosed fan cooled C) Open type D) Semi closed

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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Industrial Drivers MCQ Questions & Answers | Electrical Engineering