Control of Electric Drives MCQs with answers Page - 22

Here, you will find a collection of MCQ questions on Control of Electric Drives. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 833K Points
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Q. Which of the following is the voltage for single phase A.C. system ?

  • (A) 22 V
  • (B) 440 V
  • (C) 5 kV
  • (D) 15 kV

A

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Q. Long distance railways use which of the following ?

  • (A) 200 V D.C.
  • (B) 25 kV single phase A.
  • (C) 25 kV two phase A.C.
  • (D) 25 kV three phase A.C.

A

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Q. The speed of a locomotive is controlled by

  • (A) flywheel
  • (B) gear box
  • (C) applying brakes
  • (D) regulating steam flow to engine

A

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Q. Main traction systems used in India are, those using

  • (A) electric locomotives
  • (B) diesel engine locomotives
  • (C) steam engine locomotives
  • (D) all of the above

A

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Q. A wound rotor induction motor is preferred over squirrel cage induction motor when the major consideration involved is

  • (A) high starting torque
  • (B) low starting current
  • (C) speed control over limited range
  • (D) all of the above.

A

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Q. When smooth and precise speed control over a wide range is desired, the motor preferred is

  • (A) synchronous motor
  • (B) squirrel cage induction motor
  • (C) wound rotor induction motor
  • (D) dc motor.

A

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Q. When quick speed reversal is a consideration, the motor preferred is

  • (A) synchronous motor
  • (B) squirrel cage induction motor
  • (C) wound rotor induction motor
  • (D) dc motor.

A

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Q. Stator voltage control for speed control of induction motors is suitable for

  • (A) fan and pump drives
  • (B) drive of a crane
  • (C) running it as generator
  • (D) constant load drive.

A

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Q. The selection of control gear for a particular application is based on the consideration of

  • (A) duty
  • (B) starting torque
  • (C) limitations on starting current
  • (D) all of the above.

A

Admin • 833K Points
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Q. As compared to squirrel cage induction motor, a wound rotor induction motor is preferred when the major consideration is

  • (A) high starting torque
  • (B) low windage losses
  • (C) slow speed operation
  • (D) all of the above.

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