AM Electrical Systems & Avionics Flashcards
6 cards from real AM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 AM Electrical Systems & Avionics flashcards as text
What is the standard voltage for most general aviation aircraft DC electrical systems?
Answer: 28 volts
Most general aviation aircraft use a 28-volt DC electrical system, which is the FAA and MIL-SPEC standard.
Which FAR part governs the airworthiness standards for aircraft electrical equipment?
Answer: FAR Part 23
FAR Part 23 establishes airworthiness standards for normal, utility, acrobatic, and commuter category airplanes, including electrical systems.
What type of wire is required in aircraft electrical systems to prevent fire hazard in fuel tank areas?
Answer: Teflon-insulated wire
Teflon (PTFE)-insulated wire is required near fuel tanks because it is highly resistant to fuel, heat, and flame.
An ammeter that reads on the discharge side of zero indicates the aircraft battery is:
Answer: Discharging to supply the bus
A negative (discharge) ammeter reading means the battery is supplying current to the bus because the alternator output is insufficient.
What is the primary purpose of a current limiter in an aircraft electrical circuit?
Answer: Protect wiring from overload
A current limiter (fusible link) opens the circuit to protect wiring from damage caused by excessive current flow.
When bonding aircraft components, what maximum resistance is typically allowed between bonded parts?
Answer: 0.05 ohm
FAA Advisory Circulars specify that bonding connections should not exceed 0.003 ohm to ensure effective static discharge and EMI shielding.