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 protection device should be used in an aircraft circuit rather than a fuse when repeated resetting may be required in flight?
Answer: Circuit breaker
Circuit breakers are preferred over fuses in circuits that may need to be reset in flight because they can be manually reset without replacement.
What is the purpose of a flux gate compass in an aircraft?
Answer: Detect the Earth's magnetic field for heading reference
A flux gate compass uses electromagnetic induction to precisely sense the Earth's magnetic field, providing an accurate heading reference for remote indicating compasses and autopilots.
Before working on an aircraft radar system, a technician must ensure the:
Answer: Radar is de-energized and capacitors discharged
Aircraft radar systems store lethal high-voltage charges in capacitors that must be discharged before maintenance to prevent electrocution.
What wire gauge system is used for aircraft electrical wire sizing?
Answer: AWG (American Wire Gauge)
AWG (American Wire Gauge) is the standard system used for aircraft electrical wire sizing in the United States per FAA guidance.
An aircraft ELT must be tested in accordance with:
Answer: FAR 91.207 — within first 5 minutes of each UTC hour, for no more than 3 audio sweeps
FAR 91.207 permits ELT functional testing only within the first 5 minutes of each UTC hour, limited to 3 audible sweeps to avoid false alarm reports.
What is the minimum wire bend radius typically specified to prevent conductor damage in aircraft wiring bundles?
Answer: 3× wire diameter
AC 43.13-1B specifies that aircraft wire should not be bent to a radius less than 3 times the wire's outside diameter to avoid insulation cracking and conductor fatigue.