AM AM Electrical Systems & Avionics 2

Question 1

Which component converts AC generator output to DC for aircraft bus use?

Accepted Answer

Rectifier/TRU

Answer

A Transformer Rectifier Unit (TRU) steps down AC voltage and converts it to DC for the aircraft's DC bus.

Question 2

What does a transponder Mode C provide to ATC?

Accepted Answer

Pressure altitude and identification

Answer

Mode C transponders encode and transmit the aircraft's pressure altitude along with its squawk code to ATC radar.

Question 3

A static inverter in an aircraft converts:

Accepted Answer

DC to AC

Answer

A static inverter converts DC power from the aircraft bus to AC power needed by instruments and avionics equipment.

Question 4

What is the function of an aircraft VOR receiver?

Accepted Answer

Provides magnetic bearing to/from a VOR station

Answer

A VOR receiver measures the phase difference between reference and variable signals to determine the aircraft's magnetic bearing to or from a VOR ground station.

Question 5

When replacing an aircraft antenna coaxial cable, what must be verified after installation?

Accepted Answer

VSWR (Voltage Standing Wave Ratio)

Answer

VSWR must be measured after coaxial cable replacement to verify proper impedance matching and antenna system efficiency.

(AM) Aircraft Maintenance Certification Practice Test

(AM) Aircraft Maintenance Certification Practice Test

AM AM Electrical Systems & Avionics 2