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Electrical Machines

Electrical Machines
Diverters are used only in

None of these
 series motors
 shunt motors
 either of these

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Electrical Machines
Two single-phase alternators operating in parallel have induced EMFs on open circuit of 230∠0° and 230∠10° volts and respective reactance of j2 Ω j3 Ω calculate the terminal voltage

  223.V.
 150 V.
 200 V.
 300 V.

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Electrical Machines
Maximum allowable tan - delta (tanδ) of dielectric dispassion factor of power transformer insulating oil is generally taken as

  1 at 90°C.
 2 at 90°C.
 3 at 90°C.
 0.5 at 90°C.

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Electrical Machines
When the rotor of a 3 phase induction motor is blocked then the slip is

  1.
  0.54.
 0.7.
 0.3.

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Electrical Machines
Total core loss is also called as -------------?

 Eddy current loss
 Magnetic loss
 Copper loss
 Hysteresis loss

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Electrical Machines
Which of the following relation is correct?

 Xd = Xq.
 Xd < Xq.
 Xd > Xq.
None of these

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