Practice Exam

T3C08

1. What causes tropospheric ducting?

• A. Discharges of lightning during electrical storms
• B. Temperature inversions in the atmosphere
• C. Sunspots and solar flares
• D. Updrafts from hurricanes and tornadoes

T8C02

2. Which of these items would be useful for a hidden transmitter hunt?

• A. A calibrated noise bridge
• B. All these choices are correct
• C. A directional antenna
• D. Calibrated SWR meter

T6A04

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

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

T4A07

4. Which of the following connections is made between a computer and a transceiver to use computer software when operating digital modes?

• A. Computer "line out" to transceiver speaker connector
• B. Computer "line in" to transceiver speaker connector
• C. Computer "line in" to transceiver push-to-talk
• D. Computer "line out" to transceiver push-to-talk

T3A09

5. Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized?

• A. FM voice is unusable
• B. Digital modes are unusable
• C. Both the transmitting and receiving antennas must be of the same polarization
• D. Either vertically or horizontally polarized antennas may be used for transmission or reception

T2B08

6. Which of the following applies when two stations transmitting on the same frequency interfere with each other?

• A. Use subaudible tones so both stations can share the frequency
• B. Both stations should choose another frequency to avoid conflict
• C. Interference is inevitable, so no action is required
• D. The stations should negotiate continued use of the frequency

T4B02

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

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

T1D10

8. How does the FCC define broadcasting for the Amateur Radio Service?

• A. Transmissions intended for reception by the general public
• B. Any transmission made by the licensed station
• C. Transmission of messages directed only to amateur operators
• D. Two-way transmissions by amateur stations

T3B11

9. What is the approximate velocity of a radio wave in free space?

• A. 150,000 meters per second
• B. 300,000,000 miles per hour
• C. 150,000 miles per hour
• D. 300,000,000 meters per second

T7B10

10. What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?

• A. You are in a bad location
• B. Your transmitter is slightly off frequency
• C. All these choices are correct
• D. Your batteries are running low

T0B10

11. Which of the following is true when installing grounding conductors used for lightning protection?

• A. Sharp bends must be avoided
• B. Wires must be carefully routed with precise right-angle bends
• C. Common grounds must be avoided
• D. Use only non-insulated wire

T5D12

12. What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it?

• A. 20 volts
• B. 12 volts
• C. 0.2 volts
• D. 8 volts

T6B01

13. Which is true about forward voltage drop in a diode?

• A. It indicates that the diode is defective
• B. It is lower in some diode types than in others
• C. It is proportional to peak inverse voltage
• D. It has no impact on the voltage delivered to the load

T7D04

14. Which instrument is used to measure electric current?

• A. An ammeter
• B. An electrometer
• C. An ohmmeter
• D. A voltmeter

T1C01

15. For which license classes are new licenses currently available from the FCC?

• A. Technician, General, Amateur Extra
• B. Novice, Technician Plus, General, Advanced
• C. Novice, Technician, General, Amateur Extra
• D. Technician, Technician Plus, General, Amateur Extra

T7C07

16. What happens to power lost in a feed line?

• A. It is radiated as harmonics
• B. It is converted into heat
• C. It distorts the signal
• D. It increases the SWR

T6D03

17. Which of the following is a reason to use shielded wire?

• A. To decrease the resistance of DC power connections
• B. To increase the current carrying capability of the wire
• C. To prevent coupling of unwanted signals to or from the wire
• D. To couple the wire to other signals

T8A06

18. Which sideband is normally used for 10 meter HF, VHF, and UHF single-sideband communications?

• A. Upper sideband
• B. Lower sideband
• C. Inverted sideband
• D. Suppressed sideband

T2A12

19. What should you do before calling CQ?

• A. Make sure you are authorized to use that frequency
• B. All these choices are correct
• C. Listen first to be sure that no one else is using the frequency
• D. Ask if the frequency is in use

T8D07

20. Which of the following describes DMR?

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

T1A02

21. Which agency regulates and enforces the rules for the Amateur Radio Service in the United States?

• A. Homeland Security
• B. All these choices are correct
• C. FEMA
• D. The FCC

T1E03

22. Who must designate the station control operator?

• A. Any licensed operator
• B. The FCC
• C. The station licensee
• D. The frequency coordinator

T9B04

23. What is the major function of an antenna tuner (antenna coupler)?

• A. It helps a receiver automatically tune in weak stations
• B. It allows an antenna to be used on both transmit and receive
• C. It automatically selects the proper antenna for the frequency band being used
• D. It matches the antenna system impedance to the transceiver's output impedance

T0A11

24. What hazard exists in a power supply immediately after turning it off?

• A. Leakage flux in the power transformer
• B. Charge stored in filter capacitors
• C. Voltage transients from kickback diodes
• D. Circulating currents in the dc filter

T5A09

25. Which of the following describes alternating current?

• A. Current that alternates between positive and negative directions
• B. Current that alternates between a negative direction and zero
• C. All these answers are correct
• D. Current that alternates between a positive direction and zero

T1B09

26. Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?

• A. All these choices are correct
• B. To allow for calibration error in the transmitter frequency display
• C. To allow for transmitter frequency drift
• D. So that modulation sidebands do not extend beyond the band edge

T8B07

27. What is Doppler shift in reference to satellite communications?

• A. A mode where the satellite receives signals on one band and transmits on another
• B. A special digital communications mode for some satellites
• C. A change in the satellite orbit
• D. An observed change in signal frequency caused by relative motion between the satellite and Earth station

T6C10

28. What is component 3 in figure T-3?

• A. Meter
• B. Variable capacitor
• C. Variable inductor
• D. Connector

T9A11

29. What is antenna gain?

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

T1F10

30. Who is accountable if a repeater inadvertently retransmits communications that violate the FCC rules?

• A. Both the originating station and the repeater owner
• B. The control operator of the repeater
• C. The control operator of the originating station
• D. The owner of the repeater

T0C01

31. What type of radiation are radio signals?

• A. Ionizing radiation
• B. Non-ionizing radiation
• C. Alpha radiation
• D. Gamma radiation

T7A01

32. Which term describes the ability of a receiver to detect the presence of a signal?

• A. Selectivity
• B. Total Harmonic Distortion
• C. Sensitivity
• D. Linearity

T5C03

33. What describes the ability to store energy in a magnetic field?

• A. Inductance
• B. Capacitance
• C. Admittance
• D. Resistance

T2C01

34. When do FCC rules NOT apply to the operation of an amateur station?

• A. When operating under special FEMA rules
• B. FCC rules always apply
• C. When operating a RACES station
• D. When operating under special ARES rules

T5B01

35. How many milliamperes is 1.5 amperes?

• A. 150 milliamperes
• B. 1500 milliamperes
• C. 15 milliamperes
• D. 15,000 milliamperes