Chapter 3.1 - VHF Radio Communications

Question 1

What does RTF stand for?

Answer 1

Radiotelephony.

Question 2

Define RTF?

Answer 2

A system of transmitting and receiving voice messages by Radio.

Question 3

What does VHF stand for?

Answer 3

Very High Frequency.

Question 4

What does HF stand for?

Answer 4

High Frequency.

Question 5

True or False. A Pilot would need a license to operate an Aircraft Radio?

Answer 5

True.

Question 6

Name 4 unauthorised Transmissions when operating the Radio?

Answer 6

• Use of obscene language.
• False information or intent to deceive.
• Personal/Private nature.
• Involving the improper use of another Aircraft’s Callsign.

Question 7

True or False. Radio is a requirement for VFR?

Answer 7

True.

Question 8

VHF Communication is required in which Airspace?

Answer 8

Class C, D, E and G.

Question 9

VHF Communication is required outside controlled Airspace at what altitude?

Answer 9

5000ft AMSL or above.

Question 10

True or False. VHF Communication is not required at non-towered Aerodromes?

Answer 10

False.

Question 11

VHF Communication is required outside controlled Airspace below 3000ft AMSL or 1000ft above terrain in which conditions?

Answer 11

Reduced Visual Meteorological Conditions (VMC).

Question 12

True or False. For all VFR operating in Class C, D (CTRs) and E Airspace a continuous listening watch is required?

Answer 12

True.

Question 13

True or False. An Aircraft operating in Class G Airspace at 5000ft AMSL or above requires a continuous listening watch?

Answer 13

True.

Question 14

True or False. For Aircraft operating in Class G airspace below 5000ft AMSL is required for a Pilot to maintain continuous listening watch?

Answer 14

False. But is recommended in the interest of safety.

Question 15

What is the Standard International Frequency unit for Radio Waves?

Answer 15

Hertz (Hz).

Question 16

What is the VHF Frequency used for aviation communication?

Answer 16

Megahertz (MHz).

Question 17

VHF Communication Frequency ranges between?

Answer 17

118.0 MHz – 136.0 MHz.

Question 18

Which two factors can affect the quality of VHF Transmission?

Answer 18

• Distance.

- Obstruction.

Question 19

How can a Pilot increase the range of VHF Communication?

Answer 19

By increasing Altitude.

Question 20

A Radiotelephone has two main components?

Answer 20

• Transmitter.

- Receiver.

Question 21

Name 3 types of VHF Aerials?

Answer 21

• Blade-type.
• Rod-type.
• Combination COM/NAV.

Question 22

Name the Cockpit Controls for a Radio (3)?

Answer 22

• Selection Panel.
• Transmit Button.
• Speaker/Phone Switch.

Question 23

Name the controls of a Selection Panel in a Radio (4)?

Answer 23

• ON/OFF Switch.
• Volume Control.
• Frequency Selector.
• Squelch Control

Question 24

Name the 3 position functions for a Radio designed with automatic Squelch Control?

Answer 24

• OFF.
• ON (Power).
• TEST.

Question 25

Name the 2 position functions for a Radio designed with manual Squelch Control?

Answer 25

- ON. | - OFF.

Question 26

Before switching on the Radio, a Pilot must ensure what is turned on?

Answer 26

Master Switch.

Question 27

Name 2 methods in using the Transmit Button?

Answer 27

- Push-to-Talk Switch on the Control Wheel. | - Button on Microphone.

Question 28

True or False. A Pilot can receive Transmission whilst pressing the Transmit Button?

Answer 28

False.

Question 29

What is a Squelch Control?

Answer 29

A control to filter out unwanted background noise (static).

Question 30

The Radio Set receives its power from the Aircraft’s Electrical System via what?

Answer 30

Master Switch.

Question 31

How are all communication powered by?

Answer 31

Engine-driven Alternator.

Question 32

It is essential for a Pilot to check what regularly during flight?

Answer 32

Output of the Alternator.

Question 33

If the Alternator fails, communication equipment can be operated through what?

Answer 33

Emergency Power Source (Battery).

Question 34

True or False. Radio impose a heavy drain on Battery?

Answer 34

True.

Question 35

All communication equipment is protected by what?

Answer 35

Fuses/Circuit Breakers.

Question 36

Name the sequence for operating a Radio (6)?

Answer 36

- Check Battery Master Switch/Avionics Switch are ON. - Check Microphone and Headphones are plugged in correctly. - Switch Radio ON and adjust Squelch Control. - Select desired Radio on Audio Panel and set Speaker or Phone. - Select desired Frequency. - Adjust Volume.

Question 37

Name 5 good VHF-COM tips?

Answer 37

- Make sure Frequency is clear and working. - Think about your message beforehand. - Use good Microphone Technique. - Use standard Phraseology. - Request repeat by saying ‘Say Again’ if necessary.