Which of the following is NOT a typical function of an electrical circuit breaker in an aircraft?

Which of the following is NOT a typical function of an electrical circuit breaker in an aircraft?

• A. Interrupts current during overload.
• B. Provides continuous current during fault.
• C. Protects wiring.
• D. Enables power restoration after tripping.

Answer: (B)

Circuit breakers in aircraft are protective devices that open the circuit when current becomes too high or a fault occurs, preventing insulation damage and reducing fire risk. They interrupt current during overload or fault and, after the fault is cleared, you reset them to restore power. They also protect wiring by ensuring excessive current doesn’t flow for prolonged periods. Providing continuous current during a fault would keep the fault energized and could cause further damage or fire, so that behavior is not a typical function of a circuit breaker.

Circuit breakers in aircraft are protective devices that open the circuit when current becomes too high or a fault occurs, preventing insulation damage and reducing fire risk. They interrupt current during overload or fault and, after the fault is cleared, you reset them to restore power. They also protect wiring by ensuring excessive current doesn’t flow for prolonged periods. Providing continuous current during a fault would keep the fault energized and could cause further damage or fire, so that behavior is not a typical function of a circuit breaker.