Chapter 3.1 - Exam Review

Question 1

VHF reception is likely to be better for Aircraft flying at 100 NM from the ground station if their Altitude is (below 5000 feet/above 5000 feet)?

Answer 1

Above 5000 feet.

Question 2

Before switching on the radio, what should be checked ON first?

Answer 2

The Battery Master Switch.

Question 3

What is the purpose of the Squelch Control?

Answer 3

To remove unwanted background noise/static.

Question 4

Many VHF radios are provided with automatic squelch. Is a separate Volume Control normally provided on these sets? Do these sets normally contain a test facility to check if the receiver is working (2)?

Answer 4

• Yes.

- Yes.

Question 5

The Transmit Button is depressed to (speak/receive)?

Answer 5

Speak.

Question 6

Why shouldn’t the Transmit Button or switch be kept depressed when not speaking?

Answer 6

Because other stations trying to call on that frequency will be blocked out.

Question 7

What is the purpose of the Mute Switch?

Answer 7

To silence a particular radio, especially the Morse identification of a radio navigation aid.

Question 8

In radio sets with manual Squelch Control, is it normal for the ON/OFF switch to also act as the Volume Control?

Answer 8

Yes.

Question 9

For Aircraft fitted with dual VHF COM, what is the function of the audio selector panel in terms of transmissions?

Answer 9

It allows selection of either transmitter.

Question 10

Why are headphones a better option than the cockpit speakers?

Answer 10

Headphones reduce background noise of the cockpit.

Question 11

What are the two devices used to protect COM equipment from excessive current in their circuits?

Answer 11

• Fuses.

- Circuit Breakers.

Question 12

For HF COM, what are the frequencies in the 8 MHz band used for?

Answer 12

During hot weather in summer.