Practice the published Technician licence exam questions

T4A01

Which of the following is an appropriate power supply rating for a typical 50-watt output mobile FM transceiver?

1. A. 24.0 volts at 4 amperes
2. B. 13.8 volts at 4 amperes
3. C. 24.0 volts at 12 amperes
4. D. 13.8 volts at 12 amperes

T4A02

Which of the following should be considered when selecting an accessory SWR meter?

1. A. The frequency and power level at which the measurements will be made
2. B. The distance that the meter will be located from the antenna
3. C. The maximum SWR anticipated on the transmission line
4. D. The ability of the meter to compensate for a poor transmission line match to the antenna

T4A03

Why are short, heavy-gauge wires used for a transceiver’s DC power connection?

1. A. To minimize voltage drop when transmitting
2. B. To provide a close match to the power supply output impedance
3. C. To avoid RF interference
4. D. To minimize radiative losses in the power cable

T4A04

How are the audio input and output of a transceiver connected in a station configured to operate using FT8?

1. A. To a computer running a terminal program and connected to a terminal node controller unit
2. B. To the audio output and input of a computer running FT8 software
3. C. To an FT8 conversion unit, a keyboard, and a computer monitor
4. D. To a computer connected to the FT8converter.com website

T4A05

Where should an RF power meter be installed?

1. A. In the feed line, between the transmitter and antenna
2. B. At the power supply output
3. C. In parallel with the push-to-talk line and the antenna
4. D. In the power supply cable, as close as possible to the radio

T4A06

What signals are used in a computer-radio interface for digital mode operation?

1. A. Receive and transmit mode, status, and location
2. B. Antenna and RF power
3. C. Receive audio, transmit audio, and transmitter keying
4. D. NMEA GPS location and DC power

T4A07

Which of the following is one of the connections required between a computer and a transceiver to operate digital modes?

1. A. Computer “line out” to transceiver push-to-talk
2. B. Computer “line in” to transceiver push-to-talk
3. C. Computer “line in” to transceiver speaker connector
4. D. Computer “line out” to transceiver speaker connector

T4A08

Which of the following conductors is preferred for bonding at RF?

1. A. Copper braid removed from coaxial cable
2. B. Copper-clad steel wire
3. C. Twisted-pair cable
4. D. Flat copper strap

T4A09

How can you determine the length of time that equipment can be powered from a battery?

1. A. Divide the watt-hour rating of the battery by the peak power consumption of the equipment
2. B. Divide the battery ampere-hour rating by the average current draw of the equipment
3. C. Multiply the watts per hour consumed by the equipment by the battery power rating
4. D. Multiply the square of the current rating of the battery by the input resistance of the equipment

T4A10

What function does a digital mode hotspot perform for nearby transceivers?

1. A. Communication with a digital voice or data network
2. B. FT8 digital communications via AFSK using a smartphone connected to the internet
3. C. RTTY encoding and decoding without a computer
4. D. High-speed digital communications for meteor scatter

T4A11

Where should the negative power return of a mobile transceiver be connected in a vehicle?

1. A. At the 12-volt battery chassis ground
2. B. To the shell of the power connector
3. C. To any metal part of the vehicle
4. D. Through the transceiver’s mounting bracket

T4A12

What is an electronic keyer?

1. A. A device for switching antennas from transmit to receive
2. B. A device for voice activated switching from receive to transmit
3. C. A device that assists in manual sending of Morse code
4. D. An interlock to prevent unauthorized use of a radio

T4B01

What is the effect of excessive microphone gain on SSB transmissions?

1. A. Frequency instability
2. B. Distorted transmitted audio
3. C. Increased SWR
4. D. Sideband inversion

T4B02

Which of the following can be used to enter a transceiver’s operating frequency?

1. A. The keypad or VFO knob
2. B. The CTCSS or DTMF encoder
3. C. The Automatic Frequency Control
4. D. All these choices are correct

T4B03

How is squelch adjusted so that a weak FM signal can be heard?

1. A. Set the squelch threshold so that receiver output audio is on all the time
2. B. Turn up the audio level until it overcomes the squelch threshold
3. C. Turn on the anti-squelch function
4. D. Enable squelch enhancement

T4B04

What does an FM signal sound like when received slightly off frequency?

1. A. The audio increases in pitch
2. B. The audio decrease in pitch
3. C. There is no effect except for reduction in amplitude
4. D. The audio becomes distorted

T4B05

What does the scanning function of an FM transceiver do?

1. A. Checks incoming signal deviation
2. B. Prevents interference to nearby repeaters
3. C. Tunes through a range of frequencies to check for activity
4. D. Tunes through a range of frequencies to determine the antenna’s resonant frequency

T4B06

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

1. A. The AGC or limiter
2. B. The bandwidth selection
3. C. The tone squelch
4. D. The RIT or Clarifier

T4B07

What is a DMR “code plug”?

1. A. An adapter cable used to connect a DMR radio to a computer for internet access
2. B. Configuration data loaded onto your radio to access repeaters and talkgroups
3. C. An upgrade to DMR programming software provided by the radio manufacturer to accommodate new radio models
4. D. A Coder-Decoder (CODEC) that converts analog voice data to DMR digital data and vice versa

T4B08

What is the advantage of having a choice of receiver filter bandwidths in a multimode transceiver?

1. A. Permits monitoring several modes simultaneously by selecting a separate filter for each mode
2. B. Permits noise or interference reduction by selecting a bandwidth matching the mode
3. C. Increases the number of frequencies that can be stored in memory
4. D. Increases the amount of offset between receive and transmit frequencies

T4B09

How is a specific group of stations selected on a DMR digital voice transceiver?

1. A. By retrieving the frequencies from transceiver memory
2. B. By enabling the group’s CTCSS tone
3. C. By entering the group’s identification code
4. D. By inserting a five-pin, pre-programmed code plug

T4B10

Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?

1. A. 500 Hz
2. B. 1000 Hz
3. C. 2400 Hz
4. D. 5000 Hz

T4B11

Which of the following must be programmed into a D-STAR digital transceiver before transmitting?

1. A. Your call sign
2. B. Your output power
3. C. The codec type being used
4. D. All these choices are correct