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

Question 1

Which of the following is true concerning the microphone connectors on amateur transceivers?

A. All transceivers use the same microphone connector type

B. Some connectors include push-to-talk and voltages for powering the microphone

C. All transceivers using the same connector type are wired identically

D. Un-keyed connectors allow any microphone to be connected

Answer 1

B. Some connectors include push-to-talk and voltages for powering the microphone

Question 2

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

A. For logging contacts and contact information

B. For sending and/or receiving CW

C. For generating and decoding digital signals

D. All of these choices are correct

Answer 2

D. All of these choices are correct

Question 3

Which is a good reason to use a regulated power supply for communications equipment?

A. It prevents voltage fluctuations from reaching sensitive circuits

B. A regulated power supply has FCC approval

C. A fuse or circuit breaker regulates the power

D. Power consumption is independent of load

Answer 3

A. It prevents voltage fluctuations from reaching sensitive circuits

Question 4

Where must a filter be installed to reduce harmonic emissions from your station?

A. Between the transmitter and the antenna

B. Between the receiver and the transmitter

C. At the station power supply

D. At the microphone

Answer 4

A. Between the transmitter and the antenna

Question 5

Where should an in-line SWR meter be connected to monitor the standing wave ratio of the station antenna system?

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

B. In series with the station’s ground

C. In parallel with the push-to-talk line and the antenna

D. In series with the power supply cable, as close as possible to the radio

Answer 5

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

Question 6

Which of the following would be connected between a transceiver and computer in a packet radio station?

A. Transmatch

B. Mixer

C. Terminal node controller

D. Antenna

Answer 6

C. Terminal node controller

Question 7

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

A. The sound card communicates between the computer CPU and the video display

B. The sound card records the audio frequency for video display

C. The sound card provides audio to the microphone input and converts received audio to digital form

D. All of these choices are correct

Answer 7

C. The sound card provides audio to the microphone input and converts received audio to digital form

Question 8

Which type of conductor is best to use for RF grounding?

A. Round stranded wire

B. Round copper-clad steel wire

C. Twisted-pair cable

D. Flat strap

Answer 8

D. Flat strap

Question 9

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

A. Band-pass filter

B. Low-pass filter

C. Preamplifier

D. Ferrite choke

Answer 9

D. 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?

A. The ignition system

B. The alternator

C. The electric fuel pump

D. Anti-lock braking system controllers

Answer 10

B. The alternator

Question 11

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

A. At the battery or engine block ground strap

B. At the antenna mount

C. To any metal part of the vehicle

D. Through the transceiver’’s mounting bracket

Answer 11

A. At the battery or engine block ground strap

Question 12

What could be happening if another operator reports a variable high-pitched whine on the audio from your mobile transmitter?

A. Your microphone is picking up noise from an open window

B. You have the volume on your receiver set too high

C. You need to adjust your squelch control

D. Noise on the vehicle’’s electrical system is being transmitted along with your speech audio

Answer 12

D. Noise on the vehicle’’s electrical system is being transmitted along with your speech audio

Question 13

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

A. The output power might be too high

B. The output signal might become distorted

C. The frequency might vary

D. The SWR might increase

Answer 13

B. The output signal might become distorted

Question 14

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

A. The keypad or VFO knob

B. The CTCSS or DTMF encoder

C. The Automatic Frequency Control

D. All of these choices are correct

Answer 14

A. The keypad or VFO knob

Question 15

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

A. To set the highest level of volume desired

B. To set the transmitter power level

C. To adjust the automatic gain control

D. To mute receiver output noise when no signal is being received

Answer 15

D. To mute receiver output noise when no signal is being received

Question 16

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

A. Enable the CTCSS tones

B. Store the frequency in a memory channel

C. Disable the CTCSS tones

D. Use the scan mode to select the desired frequency

Answer 16

B. Store the frequency in a memory channel

Question 17

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

A. Change frequency slightly

B. Decrease the squelch setting

C. Turn on the noise blanker

D. Use the RIT control

Answer 17

C. Turn on the noise blanker

Question 18

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

A. The AGC or limiter

B. The bandwidth selection

C. The tone squelch

D. The receiver RIT or clarifier

Answer 18

D. The receiver RIT or clarifier

Question 19

What does the term ‘‘RIT’’ mean?

A. Receiver Input Tone

B. Receiver Incremental Tuning

C. Rectifier Inverter Test

D. Remote Input Transmitter

Answer 19

B. Receiver Incremental Tuning

Question 20

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

A. Permits monitoring several modes at once

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

C. Increases the number of frequencies that can be stored in memory

D. Increases the amount of offset between receive and transmit frequencies

Answer 20

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

Question 21

Which of the following is an appropriate receive filter bandwidth to select in order to minimize noise and interference for SSB reception?

A. 500 Hz

B. 1000 Hz

C. 2400 Hz

D. 5000 Hz

Answer 21

C. 2400 Hz

Question 22

Which of the following is an appropriate receive filter bandwidth to select in order to minimize noise and interference for CW reception?

A. 500 Hz

B. 1000 Hz

C. 2400 Hz

D. 5000 Hz

Answer 22

A. 500 Hz

Question 23

Which of the following describes the common meaning of the term “repeater offset”?

A. The distance between the repeater’’s transmit and receive antennas

B. The time delay before the repeater timer resets

C. The difference between the repeater’’s transmit and receive frequencies

D. Matching the antenna impedance to the feed line impedance

Answer 23

C. The difference between the repeater’’s transmit and receive frequencies

Question 24

What is the function of automatic gain control or AGC?

A. To keep received audio relatively constant

B. To protect an antenna from lightning

C. To eliminate RF on the station cabling

D. An asymmetric goniometer control used for antenna matching

Answer 24

A. To keep received audio relatively constant