Switchgear & Protection Test Question
Switchgear & Protection Test Question, this topic has 192 mcqs, It takes five to ten minutes to complete this free Switchgear & Protection Test Question test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Switchgear & Protection Test Question" MCQs and share with your friends, brothers, sisters.
Switchgear & Protection Test Question (Total Quiz: 192)
MCQ: In a HRC fuse what is the time between the cut off and the final current zero called?
- Pre - arcing time.
- Arcing time.
- Total operating time.
- None of these.
B
MCQ: On what basis is the selection of fuse done?
- Steady load.
- Fluctuating load.
- Both (a) and (b)
- None of these.
C
MCQ: What is the main advantage of using a fuse?
- Cheapest type of protection.
- Inverse time current characteristics
- Current limiting effect under short circuit conditions.
- All of above.
D
MCQ: When a fault occurs in a high voltage transmission line, what happens first?
- Circuit breaker operates then the relay.
- Relay operates and then the circuit breaker.
- Relay operates, then successively the isolator and the circuit breaker.
- Isolator operates, then successively the relay and the circuit breaker.
B
MCQ: Which part of the circuit breaker is helpful in breaking the current?
- Trip coil
- Contacts
- Medium
- Handle
B
MCQ: Which type of tripping is generally preferred for the circuit breaker?
- Manual
- Automatically
- Depending on the voltage level
- None of the above
B
MCQ: The arc resistance depends on which among the following factors?
- Cross section of the arc
- Length of the arc
- Degree of ionization
- All of the above
D
MCQ: How is the initiation of electric arc at the instant of contact separation caused?
- Thermionic emission of electrons.
- Field emission of electrons.
- Both (a) and (b)
- None of these.
C