Compare circuit breakers and fuses in aircraft electrical systems, including reset capability and typical application.

• A. Fuses are one-time devices that open on overcurrent; circuit breakers trip and can be reset
• B. Circuit breakers trip and can be reset, used where reusability and fast nuisance-tripping control is needed
• C. Fuses provide reusable protection and can trip repeatedly
• D. Circuit breakers are one-time devices and must be replaced after each trip

Answer: (B)