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Electrical Machines

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

 Very high.
 Very low.
 Zero.
 Normal.

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Electrical Machines
Open circuit in a transformer is prefered with

 rated transformer voltage
 direct current
 rated transformer current
 high frequency supply

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Electrical Machines
Which of the following motor is not suitable for frequent starting and stopping?

 Capacitor split phase motor
 Capacitor run motor
All of these
 Resistance split phase motor

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Electrical Machines
Which of the following machines have highest power factor with respect to magnetizing current?

 Open slot type machines.
 Any of the above.
 Closed slot type machines.
 Semi closed slot type machine.

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Electrical Machines
Capacitor start capacitor run provides

  high power factor only.
  none.
  high staring torque only.
  high staring torque and high power factor.

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Electrical Machines
The speed of rotating magnetic field of 8 pole 50 Hz induction motor is

 1000 rpm
 1500 rpm
 3000 rpm
 750 rpm

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MORE MCQ ON Electrical Machines

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