NCAA AME Avionics Practice Questions - NCAA Aircraft Maintenance Engineer Licence - Avionics Electrical (Nigeria) Exam

What is the primary function of a Transformer-Rectifier Unit (TRU) in an aircraft electrical system?

Step down 115 V AC power and convert it into 28 V DC power Convert 28 V DC battery power into 115 V AC 400 Hz power Regulate the output voltage of the main engine-driven AC generator Isolate essential avionics buses during engine start

Correct Answer:

Step down 115 V AC power and convert it into 28 V DC power

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