Power System Protection MCQ Part 3
Power system protection MCQ Part 3. Go to main
Electrical Engineering MCQ
Which one of following is an example of symmetrical fault
Which one of following is an example of symmetrical fault?
- Phase to phase fault
- Single phase to earth
- Two phases to earth
- Three phase fault
Correct answer: 4. Three phase fault
Generally the clearing time in high speed breakers is around
Generally the clearing time in high speed breakers is around:
- Few seconds
- Few minutes
- 1 to 2 cycles
- None of above
Correct answer: 3. 1 to 2 cycles
The thermal protection switch provides protection against
The thermal protection switch provides protection against:
- Short circuits
- Temperature
- Overload
- Over voltages
Correct answer: 3. Overload
In a 3-phase, 4 wire unbalanced system, the magnitude of zero sequence components can be mathematically expressed as
In a 3-phase, 4 wire unbalanced system, the magnitude of zero sequence components can be mathematically expressed as:
- √3 times of the current in neutral wire
- 1/3 times of the current in neutral wire
- ≈ Current in neutral wire
- None of these
Correct answer: 2. 1/3 times of the current in neutral wire
Arcing voltage will be least in case of
Arcing voltage will be least in case of:
- Copper
- Tungsten
- Carbon
- Silver
Correct answer: 4. Silver
More PSP MCQs
- Power System Protection MCQ Part 1
- Power System Protection MCQ Part 2
- Power System Protection MCQ Part 3
- Power System Protection MCQ Part 4
- Power System Protection MCQ Part 5
- Power System Protection MCQ Part 6
- Power System Protection MCQ Part 7
- Power System Protection MCQ Part 8
- Power System Protection MCQ Part 9
- Power System Protection MCQ Part 10