Control of Electric Drives MCQs with answers Page - 2

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A

Admin • 617.67K Points
Coach

Q. is preferred for synthetic fibre mills.

  • (A) Synchronous motor
  • (B) Reluctance motor
  • (C) Series motor
  • (D) Shunt motor

A

Admin • 617.67K Points
Coach

Q. Ward-Leonard controlled D.C. drives are generally used for excavators.

  • (A) Light duty
  • (B) Medium duty
  • (C) Heavy duty
  • (D) All of the above

A

Admin • 617.67K Points
Coach

Q. Which of the following motors is used for elevators ?

  • (A) Induction motor
  • (B) Synchronous motor
  • (C) Capacitor start single phase motor
  • (D) Any of the above

A

Admin • 617.67K Points
Coach

Q. Which part of a motor needs maximum attention for maintenance ?

  • (A) Frame
  • (B) Rearing
  • (C) Stator winding
  • (D) Rotor winding

A

Admin • 617.67K Points
Coach

Q. need frequent starting and stopping of electric motors,

  • (A) Paper mills
  • (B) Grinding mills
  • (C) Air-conditioners
  • (D) Lifts and hoists

A

Admin • 617.67K Points
Coach

Q. Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?

  • (A) Starting characteristics
  • (B) Operating speed
  • (C) Horse power
  • (D) Speed control

A

Admin • 617.67K Points
Coach

Q. motor is a constant speed motor.

  • (A) Synchronous motor
  • (B) Schrage motor
  • (C) Induction motor
  • (D) Universal motor

A

Admin • 617.67K Points
Coach

Q. The starting torque in case of centrifugal pumps is generally

  • (A) less than running torque
  • (B) same as running torque
  • (C) slightly more than running torque
  • (D) double the running torque

A

Admin • 617.67K Points
Coach

Q. Which of the following motors are best for the rolling mills ?

  • (A) Single phase motors
  • (B) Squirrel cage induction motors
  • (C) Slip ring induction motors
  • (D) D.C. motors

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