FCC Technician Class Exam Study Guide - 2014-2018/Subelement T4 Group B
Operating controls: tuning; use of filters; squelch function; AGC; repeater offset; memory channels
The Question Pool
[edit | edit source]Question 1
[edit | edit source]- 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
The correct answer is B.
Question 2
[edit | edit source]- 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
The correct answer is A.
Question 3
[edit | edit source]- 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
The correct answer is D.
Question 4
[edit | edit source]- 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
The correct answer is B.
Question 5
[edit | edit source]- 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
The correct answer is C.
Question 6
[edit | edit source]- 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
The correct answer is D.
Question 7
[edit | edit source]- What does the term "RIT" mean?
- A. Receiver Input Tone
- B. Receiver Incremental Tuning
- C. Rectifier Inverter Test
- D. Remote Input Transmitter
The correct answer is B.
Question 8
[edit | edit source]- 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
The correct answer is B.
Question 9
[edit | edit source]- 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
The correct answer is C.
Question 10
[edit | edit source]- 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
The correct answer is A.
Question 11
[edit | edit source]- 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
The correct answer is C.
Question 12
[edit | edit source]- 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
The correct answer is A.