Practice Exam

G7C05

1. Which of the following is characteristic of a direct digital synthesizer (DDS)?

• A. Pure sine wave output
• B. Relatively high-power output
• C. Variable output frequency with the stability of a crystal oscillator
• D. Extremely narrow tuning range

G9C03

2. How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

• A. They are all the same length
• B. Relative length depends on the frequency of operation
• C. The reflector is longer, and the director is shorter
• D. The reflector is shorter, and the director is longer

G4D06

3. How much change in signal strength is typically represented by one S unit?

• A. 6 dB
• B. 15 dB
• C. 12 dB
• D. 18 dB

G2C02

4. What should you do if a CW station sends "QRS?"

• A. Send slower
• B. Change frequency
• C. Increase your power
• D. Repeat everything twice

G4A06

5. What is the purpose of an antenna tuner?

• A. All these choices are correct
• B. Reduce the power dissipation in the feedline to the antenna
• C. Increase power transfer from the transmitter to the feed line
• D. Reduce the SWR in the feed line to the antenna

G1E10

6. Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

• A. A system of propagation beacon stations operates on those frequencies
• B. These frequencies are set aside for emergency operations
• C. These frequencies are set aside for bulletins from the FCC
• D. A system of automatic digital stations operates on those frequencies

G5A10

7. Which of the following devices can be used for impedance matching at radio frequencies?

• A. All these choices are correct
• B. A transformer
• C. A length of transmission line
• D. A Pi-network

G9A11

8. What is the effect of transmission line loss on SWR measured at the input to the line?

• A. Higher loss increases the accuracy of SWR measured at the input to the line
• B. Higher loss increases SWR measured at the input to the line
• C. Transmission line loss does not affect the SWR measurement
• D. Higher loss reduces SWR measured at the input to the line

G8A07

9. Which of the following phone emissions uses the narrowest bandwidth?

• A. Vestigial sideband
• B. Single sideband
• C. Phase modulation
• D. Frequency modulation

G4C03

10. What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

• A. Clearly audible speech
• B. Distorted speech
• C. A steady hum whenever the transmitter is on the air
• D. On-and-off humming or clicking

G5B07

11. What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

• A. The reciprocal of the RMS value
• B. The peak-to-peak value
• C. The RMS value
• D. The peak value

G3C07

12. What makes HF scatter signals often sound distorted?

• A. Ground waves are absorbing much of the signal
• B. The ionospheric region involved is unstable
• C. Energy is scattered into the skip zone through several different paths
• D. The E region is not present

G9B06

13. Where should the radial wires of a ground-mounted vertical antenna system be placed?

• A. Parallel to the antenna element
• B. On the surface or buried a few inches below the ground
• C. As high as possible above the ground
• D. At the center of the antenna

G6A05

14. What is the approximate forward threshold voltage of a silicon junction diode?

• A. 0.3 volts
• B. 0.7 volts
• C. 1.0 volts
• D. 0.1 volt

G9D09

15. What is the primary use of a Beverage antenna?

• A. Portable direction finding at lower HF frequencies
• B. Portable direction finding at higher HF frequencies
• C. Directional transmitting for low HF bands
• D. Directional receiving for MF and low HF bands

G7B10

16. Which of the following describes a linear amplifier?

• A. Any RF power amplifier used in conjunction with an amateur transceiver
• B. A Class C high efficiency amplifier
• C. An amplifier used as a frequency multiplier
• D. An amplifier in which the output preserves the input waveform

G1A09

17. Which of the following frequencies is within the General class portion of the 15-meter band?

• A. 18155 kHz
• B. 14250 kHz
• C. 24900 kHz
• D. 21300 kHz

G2B06

18. How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

• A. Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
• B. Send the letter "V" in Morse code several times and listen for a response, or say "test" several times and listen for a response
• C. Send "QSY" on CW or if using phone, announce "the frequency is in use," then give your call sign and listen for a response
• D. Listen for 2 minutes before calling CQ

G1C04

19. Which of the following is required by the FCC rules when operating in the 60-meter band?

• A. You must keep a record of the date, time, frequency, power level, and stations worked
• B. You must keep a record of all third-party traffic
• C. You must keep a record of the manufacturer of your equipment and the antenna used
• D. If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna

G4E04

20. Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle's auxiliary power socket?

• A. The socket is not wired with an RF-shielded power cable
• B. The DC polarity of the socket is reversed from the polarity of modern HF transceivers
• C. Drawing more than 50 watts from this socket could cause the engine to overheat
• D. The socket's wiring may be inadequate for the current drawn by the transceiver

G8B04

21. What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

• A. Reactance modulator
• B. Multiplier
• C. Balanced converter
• D. Mixer

G0B06

22. Which of the following is covered by the National Electrical Code?

• A. Acceptable modulation limits
• B. Electrical safety of the station
• C. Acceptable bandwidth limits
• D. RF exposure limits of the human body

G1D07

23. Volunteer Examiners are accredited by what organization?

• A. A Volunteer Examiner Coordinator
• B. The Wireless Telecommunications Bureau
• C. The Federal Communications Commission
• D. The Universal Licensing System

G4B10

24. Which of the following can be determined with a directional wattmeter?

• A. Antenna front-to-back ratio
• B. Standing wave ratio
• C. RF interference
• D. Radio wave propagation

G2A03

25. Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

G0A06

26. What must you do if your station fails to meet the FCC RF exposure exemption criteria?

• A. Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65
• B. Contact the FCC for permission to transmit
• C. Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
• D. Use an FCC-approved band-pass filter

G2D03

27. What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

• A. All these choices are correct
• B. Compare vertical and horizontal signal strengths on the input frequency
• C. Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
• D. Compare signal strengths between the input and output of the repeater

G8C05

28. In an ARQ mode, what is meant by a NAK response to a transmitted packet?

• A. Packet was received without error
• B. Receiving station connected and ready for transmissions
• C. Request retransmission of the packet
• D. Entire file received correctly

G5C04

29. What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

• A. 67 ohms
• B. 300 ohms
• C. 75 ohms
• D. 150 ohms

G6B04

30. What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

• A. 40 GHz
• B. 500 MHz
• C. 50 MHz
• D. 4 GHz

G7A03

31. Which type of rectifier circuit uses two diodes and a center-tapped transformer?

• A. Full-wave bridge
• B. Half-wave
• C. Synchronous
• D. Full-wave

G2E10

32. Which of the following is a way to establish contact with a digital messaging system gateway station?

• A. Send an email to the system control operator
• B. Send QRL in Morse code
• C. Transmit a connect message on the station's published frequency
• D. Respond when the station broadcasts its SSID

G3B04

33. Which of the following is a way to determine current propagation on a desired band from your station?

• A. Use a network of automated receiving stations on the internet to see where your transmissions are being received
• B. All these choices are correct
• C. Send a series of dots and listen for echoes
• D. Check the A-index

G3A05

34. What is the solar flux index?

• A. Another name for the American sunspot number
• B. A measure of solar radiation with a wavelength of 10.7 centimeters
• C. A count of sunspots that is adjusted for solar emissions
• D. A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

G1B08

35. When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

• A. Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
• B. When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
• C. Only when the foreign country has a formal third-party agreement filed with the FCC
• D. Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country