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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  zero.
  high.
  medium.
  low.

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Electrical Machines
Which of the following represents the operating region of slip in a 1-phase induction motor?

 0 < S < 2
 -2 < S < 2
 0 < S < 1
 -1 < S < 1

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Electrical Machines
For small value armature current Ia the torque developed by a DC series motor is proportional to

  1/Ia.
  √Ia.
  Ia2.
  Ia.

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Electrical Machines
If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is

 200 V.
 460 V.
 115 V.
 230 V.

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Electrical Machines
A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is

  40 V.
 20 V.
 0 V.
 60 V.

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Electrical Machines
When a transformer is loaded, the secondary terminal voltage drops. That means power factor is

 zero.
 leading.
  lagging.
 unity.

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MORE MCQ ON Electrical Machines

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