Practice Exam

T6D10

1. What is the function of component 2 in figure T-1?

• A. Convert electrical energy into radio waves
• B. Control the flow of current
• C. Supply electrical energy
• D. Give off light when current flows through it

T8D10

2. Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?

• A. All these choices are correct
• B. Weak signal propagation beacons
• C. Meteor scatter
• D. Earth-Moon-Earth

T8B06

3. Which of the following are inputs to a satellite tracking program?

• A. The last observed time of zero Doppler shift
• B. All these choices are correct
• C. The satellite transmitted power
• D. The Keplerian elements

T0A09

4. What should be done to all external ground rods or earth connections?

• A. Tune them for resonance on the lowest frequency of operation
• B. Bond them together with heavy wire or conductive strap
• C. Waterproof them with silicone caulk or electrical tape
• D. Keep them as far apart as possible

T5A09

5. 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. Current that alternates between a positive direction and zero
• D. All these answers are correct

T1D04

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

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

T1E05

7. What is an amateur station's control point?

• A. The location of the station's transmitting apparatus
• B. The location at which the control operator function is performed
• C. The mailing address of the station licensee
• D. The location of the station's transmitting antenna

T1F04

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

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

T1B09

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

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

T6C04

10. What is component 3 in figure T-1?

• A. Lamp
• B. Transistor
• C. Ground symbol
• D. Resistor

T3B12

11. Which of these frequencies travels at the highest velocity in free space?

• A. All radio frequencies travel at the same velocity
• B. Microwaves
• C. VHF
• D. UHF

T4B03

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

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

T8A02

13. What type of modulation is commonly used for VHF packet radio transmissions?

• A. SSB
• B. PSK
• C. FM or PM
• D. AM

T2C02

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

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

T0B05

15. What is the purpose of a safety wire through a turnbuckle used to tension guy lines?

• A. Provide a ground path for lightning strikes
• B. Prevent loosening of the turnbuckle from vibration
• C. Secure the guy line if the turnbuckle breaks
• D. Provide an ability to measure for proper tensioning

T5C10

16. How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?

• A. 30 watts
• B. 14.5 watts
• C. 4.8 watts
• D. 0.208 watts

T5B11

17. Which decibel value represents a power increase from 20 watts to 200 watts?

• A. 10 dB
• B. 28 dB
• C. 12 dB
• D. 18 dB

T8C08

18. What is the Internet Radio Linking Project (IRLP)?

• A. A technique for measuring signal strength of an amateur transmitter via the internet
• B. A system for providing access to websites via amateur radio
• C. A system for informing amateurs in real time of the frequency of active DX stations
• D. A technique to connect amateur radio systems, such as repeaters, via the internet

T2A05

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

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

T6A06

20. What type of electrical component stores energy in a magnetic field?

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

T0C12

21. How does RF radiation differ from ionizing radiation (radioactivity)?

• A. RF radiation does not have sufficient energy to cause chemical changes in cells and damage DNA
• B. RF radiation is limited in range to a few feet
• C. RF radiation can only be detected with an RF dosimeter
• D. RF radiation is perfectly safe

T1C05

22. Which of the following is a valid Group D call sign format for Technician class?

• A. W1XX
• B. All these choices are correct
• C. KF1XXX
• D. KA1X

T3A09

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

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

T7A10

24. What can be added to the output of a transceiver to increase the transmitted output power?

• A. An impedance multiplier
• B. A potentiometer
• C. An RF power amplifier
• D. All these choices are correct

T7C07

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

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

T6B04

26. Which of the following components can consist of three regions of semiconductor material?

• A. Triode
• B. Transistor
• C. Pentode
• D. Alternator

T4A01

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

• A. 24.0 volts at 12 amperes
• B. 13.8 volts at 4 amperes
• C. 13.8 volts at 12 amperes
• D. 24.0 volts at 4 amperes

T2B11

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

• A. QSL
• B. QRU
• C. QRZ
• D. QSY

T5D04

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

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

T3C08

30. What causes tropospheric ducting?

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

T9A04

31. What is a disadvantage of a handheld radio transceiver's short flexible antenna compared to a full-sized quarter- wave antenna?

• A. It transmits only circularly polarized signals
• B. It is more susceptible to receiver desensitization
• C. It only works on analog signals, not digital ones
• D. It has low efficiency

T9B08

32. Which of the following is a source of loss in coaxial feed line?

• A. Water intrusion into coaxial connectors
• B. Multiple connectors in the line
• C. High SWR
• D. All these choices are correct

T1A03

33. What do the FCC rules state regarding the use of a phonetic alphabet for station identification in the Amateur Radio Service?

• A. All these choices are correct
• B. It is encouraged when using phone emissions
• C. It is required when transmitting emergency messages
• D. It is required when in contact with foreign stations

T7B03

34. Which of the following can cause radio frequency interference?

• A. Fundamental overload
• B. Harmonics
• C. All these choices are correct
• D. Spurious emissions

T7D03

35. When configured to measure current, how is a multimeter connected to a component?

• A. In parallel
• B. In quadrature
• C. In phase
• D. In series