Practice Exam

T6B10

1. Which of the following can provide power gain?

• A. Transformer
• B. Resistor
• C. Reactor
• D. Transistor

T0C05

2. Why do exposure limits vary with frequency?

• A. The human body absorbs more RF energy at some frequencies than at others
• B. Lower frequency RF fields do not penetrate the human body
• C. Higher frequency RF fields are transient in nature
• D. Lower frequency RF fields have more energy than higher frequency fields

T7D09

3. What is the characteristic appearance of a cold tin-lead solder joint?

• A. A greenish tinge
• B. A rough or lumpy surface
• C. Dark black spots
• D. A bright or shiny surface

T5A03

4. What is the term for the flow of electrons in an electric circuit?

• A. Current
• B. Amperes per second
• C. Volts per second
• D. Voltage

T6A03

5. What electrical parameter is controlled by a potentiometer?

• A. Field strength
• B. Inductance
• C. Resistance
• D. Capacitance

T9B12

6. What is standing wave ratio (SWR)?

• A. The ratio of amplifier power output to input
• B. A measure of how well a load is matched to a transmission line
• C. The transmitter efficiency ratio
• D. An indication of the quality of your station's ground connection

T6C01

7. What is an electrical diagram using standard component symbols called?

• A. Connection chart
• B. Instrumentation system
• C. Schematic
• D. Flow chart

T8A03

8. Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?

• A. SSB
• B. PM
• C. FM
• D. DRM

T5D04

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

• A. 30 ohms
• B. 1/30 ohm
• C. 270 ohms
• D. 3 ohms

T4A03

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

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

T8C04

11. Which of the following is good practice when contacting another station in a contest?

• A. Sending only the minimum information needed for proper identification and the contest exchange
• B. Adding "Please copy" before your exchange
• C. Contacting the station twice to be sure that you are in his log
• D. Signing only the last two letters of your call if there are many other stations calling

T1E01

12. When may an amateur station transmit without a control operator?

• A. Never
• B. When using automatic control, such as in the case of a repeater
• C. When the transmitting station is an auxiliary station
• D. When the station licensee is away and another licensed amateur is using the station

T7C09

13. Which of the following causes failure of coaxial cables?

• A. Operation at 100% duty cycle for an extended period
• B. Moisture contamination
• C. Solder flux contamination
• D. Rapid fluctuation in transmitter output power

T1C06

14. Which of the following statements is true about using your amateur radio license when operating aboard a vessel or craft in international waters?

• A. You need special FCC authorization for maritime mobile operation
• B. You may only operate during maritime emergencies
• C. You may operate from a US-documented vessel with the master's permission
• D. Amateur operation is prohibited in international waters

T8B12

15. Which of the following is a way to determine whether your satellite uplink power into a linear transponder satellite is neither too low nor too high?

• A. Your signal strength on the downlink should be about the same as the beacon
• B. Check your signal strength report in the telemetry data
• C. Compare your signal to others on the downlink using an internet SDR receiver
• D. Listen for distortion on your downlink signal

T7B06

16. Which of the following actions should you take if a neighbor tells you that your station's transmissions are interfering with their radio or TV reception?

• A. All these choices are correct
• B. Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated
• C. Immediately turn off your transmitter and contact the nearest FCC office for assistance
• D. Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel

T2B11

17. Which Q signal indicates that you are changing frequency?

• A. QRU
• B. QSL
• C. QRZ
• D. QSY

T3C05

18. Which of the following effects may allow radio signals to travel beyond obstructions between the transmitting and receiving stations?

• A. Quantum tunneling
• B. Faraday rotation
• C. Knife-edge diffraction
• D. Doppler shift

T5B01

19. How many milliamperes is 1.5 amperes?

• A. 1500 milliamperes
• B. 0.0015 milliamperes
• C. 0.0000015 milliamperes
• D. 1,500,000 milliamperes

T2A06

20. What is an effective way to seek a call from any phone station when not using a repeater?

• A. Repeat "CQ" a few times, followed by "this is," and your call sign, then pause to listen; repeat as necessary
• B. Transmit an unmodulated carrier for approximately 10 seconds, followed by "this is" and your call sign, and pause to listen; repeat as necessary
• C. Sign your call sign once, followed by the words "listening for a call;" if there is no answer, change the frequency and repeat
• D. Say "QTC," followed by "this is" and your call sign; if there is no answer, change the frequency and repeat

T1A08

21. Who recommends transmit/receive channels for repeater and auxiliary stations?

• A. A Frequency Spectrum Manager appointed by the FCC
• B. An FCC Regional Field Office
• C. The International Telecommunication Union
• D. A Volunteer Frequency Coordinator recognized by local amateurs

T0B09

22. Why should you avoid attaching an antenna to a utility pole?

• A. The antenna could contact high-voltage power lines
• B. All these choices are correct
• C. The antenna will not work properly because of induced voltages
• D. The antenna may unbalance the power transformer, causing power fluctuations

T9A02

23. Which of the following describes a type of antenna loading?

• A. Installing a spring in the base of a mobile vertical antenna to make it more flexible
• B. Strengthening the radiating elements of a beam antenna to better resist wind damage
• C. Inserting a resistor in the radiating portion of the antenna to make it resonant
• D. Electrically lengthening by inserting inductors in radiating elements

T4B02

24. Which of the following can be used to enter a transceiver's operating frequency?

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

T3A08

25. What is a likely cause of irregular fading of signals propagated by the ionosphere?

• A. Interference from thunderstorms
• B. Random combining of signals arriving via different paths
• C. Intermodulation distortion
• D. Frequency shift due to Faraday rotation

T5C04

26. What is the unit of inductance?

• A. Henry
• B. Farad
• C. Ohm
• D. Coulomb

T0A06

27. What is a good way to guard against electrical shock at your station?

• A. Use three-wire cords and plugs for all AC powered equipment
• B. All these choices are correct
• C. Connect all AC powered station equipment to a common safety ground
• D. Ensure all capacitors used for high-voltage DC are fully discharged before working inside equipment

T1B07

28. Which of the following VHF/UHF band segments are limited to CW only?

• A. 219 MHz to 220 MHz and 420.0 MHz to 420.1 MHz
• B. All these choices are correct
• C. 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz
• D. 902.0 MHz to 902.1 MHz

T8D07

29. Which of the following describes DMR?

• A. A digital technique for transmitting on two repeater inputs simultaneously for automatic error correction
• B. An automatic computer logging technique for hands-off logging when communicating while operating a vehicle
• C. An automatic position tracking mode for FM mobiles communicating through repeaters
• D. A technique for time-multiplexing two digital voice signals on a single 12.5 kHz repeater channel

T1F04

30. What language must you use for identification when using a phone emission?

• A. Any language recognized by the United Nations
• B. Any language recognized by the ITU
• C. English, French, or Spanish
• D. English

T3B04

31. What is the velocity of a radio wave traveling through free space?

• A. Speed of sound
• B. Speed of light
• C. 1.86 times the speed of sound
• D. 0.86 times the speed of light

T2C10

32. What information is contained in the preamble of a formal traffic message?

• A. Information needed to track the message
• B. The address of the intended recipient
• C. The telephone number of the addressee
• D. The email address of the originating station

T6D08

33. Which of the following is combined with an inductor to make a resonant circuit?

• A. Zener diode
• B. Resistor
• C. Capacitor
• D. Potentiometer

T1D05

34. When may amateur radio operators use their stations to notify other amateurs of the availability of equipment for sale or trade?

• A. When the equipment is not the personal property of either the station licensee, or the control operator, or their close relatives
• B. When selling amateur radio equipment and not on a regular basis
• C. Never
• D. When no profit is made on the sale

T7A03

35. Which of the following is used to convert a signal from one frequency to another?

• A. Inverter
• B. Mixer
• C. Amplifier
• D. Phase splitter