Electrical Drives and Controls (EDC) MCQs | Page - 6

Dear candidates you will find MCQ questions of Electrical Drives and Controls (EDC) here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

M

Mr. Dubey • 97.30K Points
Coach

Q. An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 720 rpm. The frequency of the rotor current of the motor in Hz is

  • (A) 2
  • (B) 4
  • (C) 3
  • (D) 1
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M

Mr. Dubey • 97.30K Points
Coach

Q. Calculate the moment of inertia of the thin spherical shell having a mass of 73 kg and diameter of 36 cm.

  • (A) 1.56 kgm2
  • (B) 1.47 kgm2
  • (C) 1.38 kgm2
  • (D) 1.48 kgm2
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M

Mr. Dubey • 97.30K Points
Coach

Q. Calculate the phase angle of the sinusoidal waveform z(t)=78sin(456πt+2π÷78).

  • (A) π÷39
  • (B) 2π÷5
  • (C) π÷74
  • (D) 2π÷4
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M

Mr. Dubey • 97.30K Points
Coach

Q. A 50 Hz, 4poles, a single phase induction motor is rotating in the clockwise direction at a speed of 1425 rpm. The slip of motor in the direction of rotation & opposite direction of the motor will be respectively.

  • (A) 0.05, 0.95
  • (B) 0.04, 1.96
  • (C) 0.05, 1.95
  • (D) 0.05, 0.02
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M

Mr. Dubey • 97.30K Points
Coach

Q. The frame of an induction motor is made of

  • (A) aluminum
  • (B) silicon steel
  • (C) cast iron
  • (D) stainless steel
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M

Mr. Dubey • 97.30K Points
Coach

Q. The slope of the V-I curve is 5°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

  • (A) .3254 Ω
  • (B) .3608 Ω
  • (C) .3543 Ω
  • (D) .3443 Ω
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M

Mr. Dubey • 97.30K Points
Coach

Q. In an induction motor, when the number of stator slots is equal to an integral number of rotor slots

  • (A) there may be a discontinuity in torque slip characteristics
  • (B) a high starting torque will be available
  • (C) the maximum torque will be high
  • (D) the machine may fail to start
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M

Mr. Dubey • 97.30K Points
Coach

Q. rotor?

  • (A) 30 revolution per minute
  • (B) 40 revolution per minute
  • (C) 60 revolution per minute
  • (D) 50 revolution per minute
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M

Mr. Dubey • 97.30K Points
Coach

Q. Calculate the active power in a 487 H inductor.

  • (A) 2482 w
  • (B) 1545 w
  • (C) 4565 w
  • (D) 0 w
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M

Mr. Dubey • 97.30K Points
Coach

Q. Calculate the active power in a 788 ω resistor with 178 A current flowing through it.

  • (A) 24.96 mw
  • (B) 24.44 mw
  • (C) 24.12 mw
  • (D) 26.18 mw
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