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Electrical Machines

Electrical Machines
Commonly used starters of cage motor is

None of these
  both A and B.
  star delta.
  DOL.

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Electrical Machines
The power flow of a dc motor, with respect to a DC generator is

  none of these.
  modified.
  increased.
  reversed.

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Electrical Machines
A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is

 440 A.
 340 A.
 250 A.
 570 A.

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Electrical Machines
An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will

 remain unaltered
 increase by 200%
 increase by 100%
 reduced to half

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Electrical Machines
Transformers operating in parallel will share the load depending upon their

 percentage impedance.
 leakage reactance.
 efficiency.
 rating.

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Electrical Machines
Which of the following motor has the highest power factor at full load?

 Capacitor start
 Resistance split phase
 Capacitor run
 Shaded pole

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MORE MCQ ON Electrical Machines

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