M12.7.2 Avionic Systems - Communications (ATA 23) Cat A3 V4.3.0

Which systems are used for communication inside the aircraft?

• VHF system

• HF system

• Interphone and passenger address systems

• SATCOM system

Which communication system allows communication via radio signals over a distance of up to 200 nm?

• VHF system

• HF system

• SATCOM system

• ELT system

What does ELT stand for in the context of aviation communication systems?

• Electronic Locator Transmitter

• Emergency Locator Transmitter

• Enhanced Locator Transmitter

• Exclusive Locator Transmitter

Which frequency band is used by the HF communication system for long-distance communication?

• VLF

• LF

• HF

• UHF

What modulation type involves varying the amplitude of the carrier wave?

• Amplitude Modulation (AM)

• Frequency Modulation (FM)

• Phase Modulation (PM)

• Digital Modulation (DM)

Which component is responsible for transferring acoustic information into an electrical signal?

• Loudspeaker

• Microphone

• Headphones

• Amplifer

How do high-frequency radio waves typically propagate?

• Along the ground in a ground wave

• Via reflection off the ionosphere in a sky wave

• Through direct line transmission

• By bouncing off satellites

What is the primary function of modulation in radio communication?

• To select the correct frequency band

• To amplify the radio signal

• To adjust the antenna length

• To encode information onto the carrier frequency

Which component of the aircraft's communication system converts the electrical signal back into acoustic information?

• Microphone

• Loudspeaker

• Antenna

• Transceiver

What is the purpose of an antenna coupler in the HF communication system?

• To adjust the sensitivity of reception

• To select the operational mode

• To tune the antenna to the selected frequency

• To amplify the received signal