Control of Electric Drives MCQs with answers Page - 1

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A

Admin • 799.53K Points
Coach

Q. 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

A

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Coach

Q. For a particular application the type of electric-and control gear are determined by which of the following considerations ?

  • (A) Starting torque
  • (B) Conditions of environment
  • (C) Limitation on starting current
  • (D) All of the above

A

Admin • 799.53K Points
Coach

Q. Which ofthefollowingmotors is preferred for traction work ?

  • (A) Universal motor
  • (B) D.C. series motor
  • (C) Synchronous motor
  • (D) Three-phase induction motor

A

Admin • 799.53K Points
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Q. Which of the following motors always starts on load ?

  • (A) Conveyor motor
  • (B) Floor mill motor
  • (C) Fan motor
  • (D) All of the above

A

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Q. is preferred for automatic drives.

  • (A) Squirrel cage induction motor
  • (B) Synchronous motors
  • (C) Ward-Leonard controlled
  • (D) motors

A

Admin • 799.53K Points
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Q. 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

A

Admin • 799.53K Points
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Q. The load cycle for a motor driving a power press will be

  • (A) variable load
  • (B) continuous
  • (C) continuous but periodical
  • (D) intermittent and variable load

A

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Q. Light duty cranes are used in which of the following ?

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

A

Admin • 799.53K Points
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Q. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?

  • (A) Running characteristic
  • (B) Starting characteristics
  • (C) Efficiency
  • (D) Braking

A

Admin • 799.53K Points
Coach

Q. Which of the following motors are pre-ferred for overhead travelling cranes ?

  • (A) Slow speed motor
  • (B) Continuous duty motors
  • (C) Short time rated motors
  • (D) None of the above

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