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ELECTRICAL MACHINES

Electrical Machines
When a DC cummulative compound wound motor is loaded

 Torque and speed both increase.
  Torque increase and speed decrease.
 Both torque and speed decrease.
 Torque decrease and speed increases.

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Electrical Machines
DC shunt motors are suitable for

 Centrifugal pumps
 Blowers and fans.
  All of this.
 Lathes.

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Electrical Machines
In applied voltage is reduced in a dc shunt motor

  Full load current.
 None of these.
 Full load torque.
 Full load speed.

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Electrical Machines
Which of following DC motors will have percentage increase of input current for the same percentage increase in torque?

 Series.
 Differntical compound.
  Shunt.
 Cummulative compound.

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Electrical Machines
For the same power output rating and full load speed, the motor will have poorest starting torque, is

  Shunt.
 Cummulative compound.
 Differential compound.
 Series.

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