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Electrical Machines

Electrical Machines
In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses?

 1.5KW
 2KW
 3KW
 0.5Kw

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Electrical Machines
The output power indicated on the name plate of any motor is always the

 Power drawn in KVA.
 Gross power.
 Power drawn in KW.
 Output power at the shaft.

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Electrical Machines
In most condition which frame of motor will be preferred?

 Splash proof.
 Open type.
 Drip proof.
  Totally enclosed fan coiled.

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Electrical Machines
The current drawn by a DC motor at the time of starting is

 Very high.
 Zero.
 Normal.
 Very low.

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Electrical Machines
In salient pole synchronous machine, maximum power occurs at a load angle of

 90°
 0°
 less than 90°
 Greater than 90°

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Electrical Machines
High starting torque and low starting current is the advantage of

  slip ring induction motor.
  stepper motor.
  hysteresis motor.
  squirrel cage induction motor.

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