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Electrical Machines

Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

 90o.
 less than 90o.
 Greater than 90o.
 0o.

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Electrical Machines
In alternator, the rotary part is

 none of these.
 armature.
 core.
  magnetic field poles.

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Electrical Machines
What is power factor of a 3 - φ induction motor at no load?

  Equal to 1.
  Low.
  Same as full load.
  High.

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Electrical Machines
What type of connection is made in between the inter-pole and the field winding?

 Compound.
 Parallel.
  Series.
 None of the options.

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Electrical Machines
In a transformer the magnetic coupling between the primary and secondary winding can be increased by

 using the magnetic core of low reluctance.
 increasing the number of turns.
 using transformer oil of better quality.
 using soft material for winding.

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Electrical Machines
A shunt generator has a critical field resistance of 300 Ω at a speed of 800 rpm if the speed is raised to 1000 rpm the critical field resistance is

  375 Ω.
 225 Ω.
 150 Ω.
 145 Ω.

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MORE MCQ ON Electrical Machines

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