Switchgear and Protection MCQ Questions
Contents
- 1 The fuse is best defined as a
- 2 The circuit breaker must be able to perform the function of
- 3 The fusing factor is always
- 4 The circuit breaker is best defined as a
- 5 The rating of fuse is expressed in terms of
- 6 In case of fault it is desired that circuit breaker should open
- 7 The value of fusing factor for a semi-enclosed fuse employing copper as fuse element is around
- 8 Induction relays can be used for
- 9 Oil in low oil circuit breaker serves to
- 10 Which of the below-mentioned fault imposes the severest duty on circuit breaker
The fuse is best defined as a
The fuse is best defined as a:
- Current Control device
- Current Limiting device
- Protection device
- None of these
Correct answer: 3. Protection device
You might want to see: Power System Protection MCQ Questions
The circuit breaker must be able to perform the function of
The circuit breaker must be able to perform the function of
- Breaking fault current
- Opening faulty circuit
- Carrying fault current for short time
- All of these
Correct answer: 4. All of these
The fusing factor is always
The fusing factor is always:
- Less than 1
- Equal to 1
- More than 1
- Any of above is possible
Correct answer: 3. More than 1
The circuit breaker is best defined as a
The circuit breaker is best defined as a:
- Current Control device
- Current Limiting device
- Circuit interruption device
- None of these
Correct answer: 3. Circuit interruption device
The rating of fuse is expressed in terms of
The rating of fuse is expressed in terms of:
- Amperes
- Volts
- Volt-amperes
- kVAR
Correct answer: 1. Amperes
In case of fault it is desired that circuit breaker should open
In case of fault it is desired that circuit breaker should open:
- Manually
- Automatically
- Any of above
- None of above
Correct answer: 2. Automatically
The value of fusing factor for a semi-enclosed fuse employing copper as fuse element is around
The value of fusing factor for a semi-enclosed fuse employing copper as fuse element is around:
- 0.5
- 1.5
- 2
- 5
Correct answer: 3. 2
Learn more about fusing factor here
Induction relays can be used for
Induction relays can be used for:
- AC quantities only
- DC quantities only
- Both of these
- None of these
Correct answer: 1. AC quantities only
Oil in low oil circuit breaker serves to
Oil in low oil circuit breaker serves to:
- Provide arc extinction
- Provide insulation
- Both of above
- None of above
Correct answer: 1. Provide arc extinction
Which of the below-mentioned fault imposes the severest duty on circuit breaker
Which of the below mentioned fault imposes severest duty on circuit breaker:
- Line to Ground fault
- Line to Line fault
- Line to Line to Line fault
- Three phase fault
Correct answer: 4. Three phase fault