Question 1: The circuit breaker is placed in a power system …………………………..
- To interrupt the current flow system
- To interrupt the voltage flow in system
- To reduce the reactive power in system
- To interrupt the active power flow in system
BASIC
NEC 2023
circuit breaker theory quiz question and answers
Free online quiz practice test on circuit breaker
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Timecircuit breaker theory quiz question and answers — Question List
Question 2: If the arc in the circuit breaker is absent during the opening of circuit contacts ……………………….
- A high switch over voltage will flow in the circuit
- A high current will flow in the circuit
- High temperature in the circuit breaker cabinet damages the breaker enclosure
- High reactive power flows in the circuit
Question 3: Which of the SF6 property specifies that it has high arc quenching medium?
- Electronegativity
- Electropositivity
- High thermal conductivity
- High density
Question 4: Which of the following circuit breaker should not be used in high voltage power systems?
- Minimum oil circuit breaker
- air blast circuit breaker
- SF6 circuit breaker
- Oil circuit breaker
Question 5: The voltage that presents at breaking contact at the instant of arc extinction is called as ……………….
- Restricting voltage
- Recovery voltage
- Arc voltage
- Active recovery voltage
Question 6: The major function of the relay in circuit breaker is…………………………
- To interrupt the current flow
- To activate the trip signal to open the contacts
- To protect the circuit break from high short circuit currents
- To help in faster switching
Question 7: The air circuit breaker can be used up to the voltage level of ………………. KV
- 15
- 21
- 6.6
- 11
Question 8: Low resistance method of arc interruption is applicable for only …………………
- AC circuits
- DC circuits
- AC circuits with low voltage
- DC circuits with low voltage
Question 9: Which of the following circuit breakers are used for extra high voltage power systems?
- Oil circuit breakers
- Air circuit breakers
- SF6 circuit breakers
- Bulk oil circuit breakers
Question 10: What does GIS stands for?
- Gas insulated switchgear
- Gas insulated system
- Gas interrupted switch gear
- Gas interrupted system
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