Synchronous Generator MCQs

Synchronous Generator MCQs

Synchronous Generator is also known as

Synchronous Generator is also known as:

  1. Alternator
  2. DC Generator
  3. Both of these
  4. None of these

Correct answer: 1. Alternator

The stator of an alternator rarely employs

The stator of an alternator rarely employs

  1. Closed type slots
  2. Wide open type slots
  3. Semi-closed type slots
  4. None of these

Correct answer: 1. Closed type slots

A turbo-alternator uses

A turbo-alternator uses:

  1. Rotating AC armature winding
  2. Salient-pole field structure
  3. Non-salient-pole field structure
  4. None of the above

Correct answer: 3. Non-salient-pole field structure

The synchronous reactance of alternator is due to

The synchronous reactance of alternator is due to:

  1. Armature reaction
  2. DC Field excitation
  3. Leakage flux
  4. None of the above

Correct answer: 1. Armature reaction

The voltage regulation of an alternator for PF of 0.8 lagging is X at unity PF

The voltage regulation of an alternator for PF of 0.8 lagging is X at unity PF:

  1. Smaller than
  2. Greater than
  3. The same as
  4. None of the above

Correct answer: 2. Greater than

The magnitude of EMF generated by an alternator depends on

The magnitude of EMF generated by an alternator depends on:

  1. Rotor speed
  2. Flux per pole
  3. Number of poles
  4. All of these

Correct answer: 4. All of these

When the alternator operates at a unity load power factor the effect of armature reaction is

When the alternator operates at a unity load power factor the effect of armature reaction is:

  1. Wholly distorting
  2. Wholly demagnetizing
  3. Wholly magnetizing
  4. Partly distorting, partly demagnetizing

Correct answer: 1. Wholly distorting

The frequency of EMF generated per revolution in an alternator is equal to

The frequency of EMF generated per revolution in an alternator is equal to:

  1. Number of poles
  2. Number of pair of poles
  3. Twice the number of poles
  4. Thrice the number of poles

Correct answer: 2. Number of pair of poles

The stator of an alternator is wound for ____________ on the rotor

The stator of an alternator is wound for ____________ on the rotor:

  1. The same number of poles as
  2. More number of poles than
  3. Less number of poles than
  4. None of the above

Correct answer: 1. The same number of poles as

Voltage regulation of an alternator is larger than that of a DC generator because of

Voltage regulation of an alternator is larger than that of a DC generator because of

  1. Large leakage reactance
  2. Large armature resistance
  3. Complex effects of armature reaction
  4. None of these

Correct answer: 3. Complex effects of armature reaction

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