Question 1
In a typical general aviation aircraft, what is the primary function of the aircraft's alternator?
Correct Answer:
To charge the battery and power the electrical bus during engine operation
Question 2
What is the nominal voltage of a standard 14-volt aircraft electrical system when measured at the bus with the alternator online?
Correct Answer:
13.8–14.5 volts
Question 3
Which component in an aircraft's DC power system prevents the battery from discharging through the alternator when the alternator output is lower than battery voltage?
Correct Answer:
Isolation diode or split-bus relay
Question 4
What is the typical voltage output of an aircraft's 28V DC bus system when fully regulated?
Correct Answer:
27.5–28.5 volts
Question 5
In a constant-speed drive (CSD) generator system found on transport-category aircraft, what does the CSD unit do?
Correct Answer:
Maintains constant generator shaft speed regardless of engine RPM
Question 1
Exam overview

About this Exam

Prepare with the ASTM NCATT AET – Aircraft Electronics Technician practice quiz. This question bank includes 90 questions covering aircraft, avionics, data, wiring, and corrosion. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ASTM NCATT AET – Aircraft Electronics Technician

This practice set contains 90 questions from the matching question bank and focuses on aircraft, avionics, data, wiring, and corrosion. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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