Sub-Element T4 Amateur radio practices and station set-up [2 Exam Questions]

Question 1

What must be considered to determine the minimum current capacity needed for a transceiver power supply?

Answer 1

All of these choices are correct

Question 2

How might a computer be used as part of an amateur radio station?

Answer 2

All of these choices are correct

Question 3

Why should wiring between the power source and radio be heavy-gauge wire and kept as short as possible?

Answer 3

To avoid voltage falling below that needed for proper operation

Question 4

Which computer sound card port is connected to a transceiver’s headphone or speaker output for operating digital modes?

Answer 4

Microphone or line input

Question 5

What is the proper location for an external SWR meter?

Answer 5

In series with the feed line, between the transmitter and antenna

Question 6

Which of the following connections might be used between a voice transceiver and a computer for digital operation?

Answer 6

Receive audio, transmit audio, and push-to-talk (PTT)

Question 7

How is a computer’s sound card used when conducting digital communications?

Answer 7

The sound card provides audio to the radio’s microphone input and converts received audio to digital form

Question 8

Which of the following conductors provides the lowest impedance to RF signals?

Answer 8

Flat strap

Question 9

Which of the following could you use to cure distorted audio caused by RF current on the shield of a microphone cable?

Answer 9

Ferrite choke

Question 10

What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver’s receive audio?

Answer 10

The alternator

Question 11

Where should the negative return connection of a mobile transceiver’s power cable be connected?

Answer 11

At the battery or engine block ground strap

Question 12

What may happen if a transmitter is operated with the microphone gain set too high?

Answer 12

The output signal might become distorted

Question 13

Which of the following can be used to enter the operating frequency on a modern transceiver?

Answer 13

The keypad or VFO knob

Question 14

What is the purpose of the squelch control on a transceiver?

Answer 14

To mute receiver output noise when no signal is being received

Question 15

What is a way to enable quick access to a favorite frequency on your transceiver?

Answer 15

Store the frequency in a memory channel

Question 16

Which of the following would reduce ignition interference to a receiver?

Answer 16

Turn on the noise blanker

Question 17

Which of the following controls could be used if the voice pitch of a single-sideband signal seems too high or low?

Answer 17

The receiver RIT or clarifier

Question 18

What does the term “RIT” mean?

Answer 18

Receiver Incremental Tuning

Question 19

What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?

Answer 19

Permits noise or interference reduction by selecting a bandwidth matching the mode

Question 20

Which of the following is an appropriate receive filter bandwidth for minimizing noise and interference for SSB reception?

Answer 20

2400 Hz

Question 21

Which of the following is an appropriate receive filter bandwidth for minimizing noise and interference for CW reception?

Answer 21

500 Hz

Question 22

What is the function of automatic gain control, or AGC?

Answer 22

To keep received audio relatively constant

Question 23

Which of the following could be used to remove power line noise or ignition noise?

Answer 23

Noise blanker

Question 24

Which of the following is a use for the scanning function of an FM transceiver?

Answer 24

To scan through a range of frequencies to check for activity