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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  high.
  medium.
  low.
  zero.

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Electrical Machines
Which type of motors are preferred in lifts?

 DC series motors.
 DC compound motors.
 DC shunt motors.
None of these

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Electrical Machines
In which of the following speed control of DC motor the speed obtained is below than the rated speed?

 Any of above.
 Armature voltage control.
 Field resistance control.
 Armature circuit resistance control.

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Electrical Machines
Wave winding is prefered for which of the following rating?

 high current and high voltage
 low current and low voltage
 high current and low voltage
 low current and high voltage

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Electrical Machines
Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?

 Eye bolt.
 Dummy coils.
 Equalizer rings.
 Commutator.

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Electrical Machines
In travelling cranes for swing action which motor is preferred?

  Reluctance motor.
  Capacitor type induction motors.
  DC series motor.
  AC slip ring IM.

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