AMT AMT Avionics & Electrical Systems 2 — Questions and Answers
Question 1: Which component in an aircraft charging system converts mechanical energy into electrical energy?
- Battery
- Inverter
- Alternator or generator (Correct answer)
- Transformer
Correct answer: Alternator or generator
An alternator or generator is driven by the engine and converts mechanical rotational energy into electrical energy to power the aircraft systems and charge the battery.
Question 2: What does the acronym 'ADF' stand for in aircraft avionics?
- Automatic Direction Finder (Correct answer)
- Altitude Data Feed
- Airspeed Display Function
- Autopilot Drive Frequency
Correct answer: Automatic Direction Finder
ADF stands for Automatic Direction Finder, a navigation radio that uses a low-frequency/medium-frequency signal to determine bearing to a ground station.
Question 3: Before performing maintenance on an aircraft avionics system, what is the first action an AMT should take?
- Disconnect the battery and de-energize the system (Correct answer)
- Update the avionics software
- Run a full systems test
- Check the weather
Correct answer: Disconnect the battery and de-energize the system
Disconnecting the battery and de-energizing the electrical system is the required first step to prevent electrical shock and equipment damage during avionics maintenance.
Question 4: What is the function of a VOR receiver in an aircraft?
- Measures aircraft altitude
- Receives VHF omnidirectional range signals for navigation (Correct answer)
- Monitors engine performance
- Transmits position to ATC
Correct answer: Receives VHF omnidirectional range signals for navigation
A VOR receiver picks up VHF signals from ground-based VOR stations, allowing the pilot to determine their radial position relative to the station for navigation.
Question 5: Which document must be completed after any avionics installation or alteration on a certificated aircraft?
- FAA Form 337 (Major Repair and Alteration) (Correct answer)
- FAA Form 8130-3
- FAA Form 8710-1
- FAA Form 8060-4
Correct answer: FAA Form 337 (Major Repair and Alteration)
FAA Form 337 must be completed and filed for any major repair or alteration, including most avionics installations, on US-certificated aircraft.
Question 6: What is the primary purpose of an aircraft transponder?
- To navigate between airports
- To communicate with passengers
- To reply to ATC radar interrogations with aircraft identification and altitude (Correct answer)
- To detect other aircraft traffic
Correct answer: To reply to ATC radar interrogations with aircraft identification and altitude
A transponder receives radar interrogation signals from ATC and automatically replies with a coded squawk and Mode C altitude information.
AMT AMT Avionics & Electrical Systems 2
Which component in an aircraft charging system converts mechanical energy into electrical energy?