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Electrical Machines

Electrical Machines
Iron losses in a DC machine are independent of variation in

  voltage.
  speed and voltage.
 speed.
  load.

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Electrical Machines
In synchronous generator V curve is drawn between

 either of these.
 field current on X-axis and power factor on Y-axis.
 field current on X-axis and armature current on Y-axis.
 field current on Y-axis and armature current on X-axis.

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Electrical Machines
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop

  DC motor torque.
  induction generator torque.
  synchronous motor torque.
  induction motor torque.

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Electrical Machines
In which of the following generators negative voltage regulation can occur?

 shunt generator
 both B and C
 series generators
 over compound generator

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Electrical Machines
Maximum power developed by a synchronous motor depends on

 excitation and load angle
 supply voltage and excitation
 supply voltage, load angle and excitation
 supply voltage and load angle

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Electrical Machines
In a DC generator the actual flux distribution depends upon

  all of above.
  shape of the pole shoe.
 size of air gap.
  clearance between tips of the adjacent pole shoes.

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MORE MCQ ON Electrical Machines

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