Practice Exam

T8D02

1. What is a "talkgroup" on a DMR repeater?

• A. A group of operators sharing common interests
• B. A way for groups of users to share a channel at different times without hearing other users on the channel
• C. A net that meets at a specified time
• D. A protocol that increases the signal-to-noise ratio when multiple repeaters are linked together

T2C02

2. Which of the following are typical duties of a Net Control Station?

• A. Ensure that all stations checking into the net are properly licensed for operation on the net frequency
• B. All these choices are correct
• C. Call the net to order and direct communications between stations checking in
• D. Choose the regular net meeting time and frequency

T1A06

3. What is the FCC Part 97 definition of a beacon?

• A. An amateur station transmitting communications for the purposes of observing propagation or related experimental activities
• B. A continuous transmission of weather information authorized in the amateur bands by the National Weather Service
• C. A bulletin sent by the FCC to announce a national emergency
• D. A government transmitter marking the amateur radio band edges

T5A07

4. Why are metals generally good conductors of electricity?

• A. All these choices are correct
• B. They have many free protons
• C. They have many free electrons
• D. They have relatively high density

T6B07

5. What causes a light-emitting diode (LED) to emit light?

• A. Inductively-coupled RF signal
• B. Forward current
• C. Reverse current
• D. Capacitively-coupled RF signal

T0B11

6. Which of the following establishes grounding requirements for an amateur radio tower or antenna?

• A. UL recommended practices
• B. FAA tower lighting regulations
• C. Local electrical codes
• D. FCC Part 97 rules

T2A05

7. How should you respond to a station calling CQ?

• A. Transmit a signal report followed by your call sign
• B. Transmit the other station's call sign followed by your call sign
• C. Transmit your call sign followed by the other station's call sign
• D. Transmit "CQ" followed by the other station's call sign

T7D10

8. What reading indicates that an ohmmeter is connected across a large, discharged capacitor?

• A. Decreasing resistance with time
• B. Steady full-scale reading
• C. Alternating between open and short circuit
• D. Increasing resistance with time

T7A10

9. What device increases the transmitted output power from a transceiver?

• A. All these choices are correct
• B. An RF power amplifier
• C. An impedance network
• D. A voltage divider

T8B04

10. What mode of transmission is commonly used by amateur radio satellites?

• A. All these choices are correct
• B. SSB
• C. CW/data
• D. FM

T0A04

11. What is the purpose of a fuse in an electrical circuit?

• A. To prevent power supply ripple from damaging a component
• B. To limit current to prevent shocks
• C. All these choices are correct
• D. To remove power in case of overload

T9A11

12. What is antenna gain?

• A. The increase in signal strength in a specified direction compared to a reference antenna
• B. The additional power that is required in the antenna when transmitting on a higher frequency
• C. The additional power that is added to the transmitter power
• D. The increase in impedance on receive or transmit compared to a reference antenna

T7B01

13. What can you do if you are told your FM handheld or mobile transceiver is over-deviating?

• A. Change to a higher power level
• B. Talk louder into the microphone
• C. Let the transceiver cool off
• D. Talk farther away from the microphone

T6A04

14. What electrical component stores energy in an electric field?

• A. Varistor
• B. Capacitor
• C. Diode
• D. Inductor

T0C11

15. What is the definition of duty cycle during the averaging time for RF exposure?

• A. The difference between the PEP and average power output of a transmitter
• B. The percentage of time that a transmitter is transmitting
• C. The percentage of time that a transmitter is not transmitting
• D. The difference between the lowest power output and the highest power output of a transmitter

T3C01

16. Why are simplex UHF signals rarely heard beyond their radio horizon?

• A. UHF signals are usually not propagated by the ionosphere
• B. They are too weak to go very far
• C. FCC regulations prohibit them from going more than 50 miles
• D. UHF signals are absorbed by the ionospheric D region

T8C09

17. Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission?

• A. EchoLink
• B. D-STAR
• C. DMR
• D. IRLP

T8A12

18. Which of the following is a disadvantage of FM compared with single sideband?

• A. Voice quality is poorer
• B. Only one signal can be received at a time
• C. All these choices are correct
• D. FM signals are harder to tune

T7C11

19. What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types?

• A. It requires special techniques to prevent moisture in the cable
• B. It has more loss per foot
• C. It cannot be used at below freezing temperatures
• D. It cannot be used for VHF or UHF antennas

T5C13

20. What is the abbreviation for kilohertz?

• A. KHZ
• B. kHz
• C. khz
• D. khZ

T2B13

21. What is the purpose of a squelch function?

• A. Eliminate parasitic oscillations in an RF amplifier
• B. Mute the receiver audio when a signal is not present
• C. Reduce a CW transmitter's key clicks
• D. Reduce interference from impulse noise

T6C08

22. What is component 9 in figure T-2?

• A. Variable transformer
• B. Variable resistor
• C. Variable inductor
• D. Variable capacitor

T3B07

23. In addition to frequency, which of the following is used to identify amateur radio bands?

• A. The approximate wavelength in meters
• B. Traditional letter/number designators
• C. Channel numbers
• D. All these choices are correct

T1F06

24. Which of the following self-assigned indicators are acceptable when using a phone transmission?

• A. KL7CC stroke W3
• B. KL7CC slash W3
• C. KL7CC slant W3
• D. All these choices are correct

T1B08

25. How are US amateurs restricted in segments of bands where the Amateur Radio Service is secondary?

• A. Digital transmissions are not permitted in those segments
• B. U.S. amateurs must give foreign amateur stations priority in those segments
• C. U.S. amateurs may find non-amateur stations in those segments, and must avoid interfering with them
• D. International communications are not permitted in those segments

T5D04

26. What is the resistance of a circuit in which a current of 3 amperes flows when connected to 90 volts?

• A. 270 ohms
• B. 93 ohms
• C. 30 ohms
• D. 3 ohms

T1D04

27. Under what conditions is an amateur station authorized to transmit music using a phone emission?

• A. When the music is transmitted above 1280 MHz
• B. When transmissions are limited to less than three minutes per hour
• C. When incidental to an authorized retransmission of manned spacecraft communications
• D. When the music produces no spurious emissions

T3A11

28. Which region of the atmosphere can refract or bend HF and VHF radio waves?

• A. The mesosphere
• B. The troposphere
• C. The ionosphere
• D. The stratosphere

T4A05

29. Where should an RF power meter be installed?

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

T5B10

30. Which decibel value most closely represents a power decrease from 12 watts to 3 watts?

• A. -6 dB
• B. -9 dB
• C. -3 dB
• D. -1 dB

T1E04

31. What determines the transmitting frequency privileges of an amateur station?

• A. The frequency authorized by the frequency coordinator
• B. The frequencies printed on the license grant
• C. The highest class of operator license held by anyone on the premises
• D. The class of operator license held by the control operator

T1C02

32. Who may select a desired call sign under the vanity call sign rules?

• A. Any licensed amateur
• B. Only a licensed amateur with a General or Amateur Extra Class license
• C. Only a licensed amateur with an Amateur Extra Class license
• D. Only a licensed amateur who has been licensed continuously for more than 10 years

T6D02

33. What is a relay?

• A. An inverting amplifier
• B. A current controlled amplifier
• C. A pass transistor
• D. An electrically-controlled switch

T9B03

34. Why is coaxial cable the most common feed line for amateur radio antenna systems?

• A. It can handle more power than any other type of feed line
• B. It is less expensive than any other type of feed line
• C. It has less loss than any other type of feed line
• D. It is easy to use and requires few special installation considerations

T4B11

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

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