Synchronous Generator MCQs Part 11

Synchronous Generator MCQs Part 11

The AC armature winding of an alternator is connected in which configuration

The AC armature winding of an alternator is connected in which configuration:

  1. It is always star-connected
  2. It is usually delta-connected
  3. Star-delta connected
  4. None of these

Correct answer: 1. It is always star-connected

WRT alternator which of following is a disadvantage of a short-pitched coil

WRT alternator which of following is a disadvantage of a short-pitched coil:

  1. Harmonics are introduced
  2. Voltage around the coil is reduced
  3. Waveform becomes non-sinusoidal
  4. None of these

Correct answer: 2. Voltage around the coil is reduced

Voltage drop in an alternator when under load is due to

Voltage drop in an alternator when under load is due to:

  1. Armature reaction
  2. Armature resistance
  3. Armature reactance
  4. All of these

Correct answer: 4. All of these

The prime mover that has normally high rotating speed

The prime mover that has normally high rotating speed

  • Steam engine
  • Hydraulic turbine
  • Diesel engine

Correct answer: 1. Steam turbine

The synchronous reactance of an alternator is generally how many times of armature resistance

The synchronous reactance of an alternator is generally how many times of armature resistance

  1. It is 5 times smaller than armature resistance
  2. 5 times greater than armature resistance
  3. 10 to 100 times greater than armature resistance
  4. None of these

Correct answer: 3. 10 to 100 times greater than armature resistance

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