Synchronous Generator MCQs Part 4
Contents
- 1 The field winding of alternator is excited with
- 2 The rotor of turbo-alternator is made cylindrical in order to reduce
- 3 If the lagging load PF of an alternator is decreased, the demagnetizing effect of armature reaction
- 4 An alternator operates on principle of
- 5 Three-phase alternators are invariably connected in star in order to
The field winding of alternator is excited with
The field winding of alternator is excited with
- AC
- DC
- Both of these
- None of these
Correct answer: 2. DC
The rotor of turbo-alternator is made cylindrical in order to reduce
The rotor of turbo-alternator is made cylindrical in order to reduce
- Windage losses
- Eddy current loss
- Hysteresis loss
- None of the above
Correct answer: 1. Windage losses
If the lagging load PF of an alternator is decreased, the demagnetizing effect of armature reaction
If the lagging load PF of an alternator is decreased, the demagnetizing effect of armature reaction
- Is increased
- Is decreased
- Remains the same
- None of the above
Correct answer: 1. Is increased
An alternator operates on principle of
An alternator operates on principle of
- Self-induction
- Mutual induction
- Self or mutual induction
- Electromagnetic induction
Correct answer: 4. Electromagnetic induction
Three-phase alternators are invariably connected in star in order to
Three-phase alternators are invariably connected in star in order to:
- Reduce magnetic losses
- Increase terminal voltage
- Reduce size of stator conductor
- All of the above
Correct answer: 2. Increase terminal voltage