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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  zero.
  medium.
  high.
  low.

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Electrical Machines
A 4 pole DC shunt generator having a wave winding supplies 50 lamps, each of 60 W at 120 V. The armature and field resistance are 0.2 Ω and 60 Ω respectively. The current in each armature conductor is

 23 A.
  13.5 A.
 27 A.
 11.5 A.

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Electrical Machines
At slip s = 1 torque developed in machine is

  starting torque.
  none.
  electromagnetic torque.
  maximum torque.

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Electrical Machines
Compensating windings is placed in which part of a D.C motor?

 On yoke in the inter pole gap.
 On armature.
None of these
  On yoke in the pole faces.

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Electrical Machines
A 3 - Φ, 6 pole, 50 Hz IM is running at a full load speed of 980 rpm. If it delivers an air gap power of 98000 Watt, calculate the rotor ohmic loss?

  1960 Watt.
  980 Watt.
 1920 Watt.
 1800 Watt.

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Electrical Machines
In a DC compound motor the field regulator is provided to

 demagnetize the field partially.
 limit the armature current.
 control the armature flux.
 control the field flux.

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MORE MCQ ON Electrical Machines

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