VHF Communication System

What is the primary purpose of an aircraft VHF communication system?

A) Weather detection

B) Voice communication between aircraft and ATC

C) Aircraft navigation

Answer: B

A) 108.00–117.95 MHz

B) 329.15–335.00 MHz

C) 118.000–136.975 MHz

Answer: C

Which modulation method is used for aircraft VHF communications?

A) FM

B) PM

C) AM

Answer: C

Why is AM used instead of FM?

A) It provides higher power output.

B) It allows pilots to hear overlapping transmissions.

C) It gives longer communication range

Answer: B

Modern European VHF communication systems mainly use which channel spacing?

A) 100 kHz

B) 50 kHz

C) 8.33 kHz

Answer: C

Typical transmitter RF power output is:

A) 1–5 W

B) 16–25 W

C) 150 W

Answer: B

Communication range mainly depends upon:

A) Battery voltage

B) Aircraft altitude and line-of-sight

C) Engine RPM

Answer: B

Pressing the Push-To-Talk (PTT) switch causes:

A) The antenna to rotate.

B) The microphone audio to be transmitted.

C) The receiver to switch off permanently.

Answer: B