AMT Avionics & Electrical Systems Flashcards
6 cards from real AMT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 AMT Avionics & Electrical Systems flashcards as text
What is the standard voltage for most general aviation aircraft electrical systems?
Answer: 28 volts DC
Most general aviation and military aircraft use a 28-volt DC electrical system as the standard operating voltage.
Which federal regulation governs the installation of avionics and electrical equipment in US-certificated aircraft?
Answer: 14 CFR Part 43
14 CFR Part 43 governs maintenance, preventive maintenance, rebuilding, and alteration of aircraft, including avionics and electrical system work.
What device protects an aircraft electrical circuit from overcurrent conditions?
Answer: Circuit breaker or fuse
Circuit breakers and fuses protect electrical circuits by interrupting current flow when it exceeds a safe level.
When troubleshooting an aircraft avionics system, what instrument is most commonly used to measure resistance?
Answer: Multimeter (ohmmeter function)
A multimeter set to the ohmmeter function measures resistance in wiring and components during avionics troubleshooting.
What type of wire insulation is required for aircraft electrical wiring exposed to high-temperature engine compartment areas?
Answer: MIL-SPEC high-temperature insulation (e.g., PTFE)
MIL-SPEC high-temperature wiring such as PTFE (Teflon) insulated wire is required in engine compartments to withstand extreme heat.
What is the purpose of a bus bar in an aircraft electrical system?
Answer: To distribute electrical power to multiple circuits from a common point
A bus bar serves as a common distribution point that routes electrical power from the source to multiple individual circuits.