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Electrical Machines

Electrical Machines
DC shunt motors are suitable for

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

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Electrical Machines
If an induction machine is run at above the synchronous speed it acts as

None of these
 an induction generator
 an induction motor
 a synchronous motor

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Electrical Machines
Eg (generated emf) and Eb (back emf) both are

 different.
 changes.
 none of above.
 same.

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Electrical Machines
Which of the following voltage regulator is preferred for providing large values of load current?

  Zener diode shunt regulator.
  Transistor series regulator.
None of these
  Transistor shunt regulator.

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Electrical Machines
A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor?

 1500 rpm
 zero
 30 rpm
 1470 rpm

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Electrical Machines
A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

 250 A.
 340 A.
 570 A.
 460 A.

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MORE MCQ ON Electrical Machines

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