Multiple Choice
Which of the following is the demerit of SF6 circuit breakers?
A) Sealing problem of gas
B) In flux of moisture in the gas system is dangerous
C) Deterioration of quality of circuit breaker affects reliability of circuit breaker
D) All of the above.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Which of the following is not a
Q2: Which of the following statement about SF6
Q3: The breaking capacity of a circuit breaker
Q4: For a circuit breaker 'break time' is<br>A)Same
Q5: Which of the following relays is used
Q7: The values of fault current depend on<br>A)Voltage
Q8: Merz-price protection is used on<br>A)Substations<br>B)Capacitor bank<br>C)Induction motor<br>D)Generators.
Q9: The tripping circuit is_<br>A)AC<br>B)DC<br>C)either AC or DC<br>D)None
Q10: Plug setting of a electromagnetic relay can
Q11: Which of the following are air-break switching