Practice Exam

G3B12

1. Which of the following is typical of the lower HF frequencies during the summer?

• A. Heavy distortion on signals due to photon absorption
• B. High levels of atmospheric noise or static
• C. Poor propagation at any time of day
• D. World-wide propagation during daylight hours

G7C01

2. What circuit is used to select one of the sidebands from a balanced modulator?

• A. IF amplifier
• B. RF amplifier
• C. Filter
• D. Carrier oscillator

G3A10

3. What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

• A. Rotation of the Sun's surface layers around its axis
• B. The position of the Moon in its orbit
• C. Cyclic variation in Earth's radiation belts
• D. Long term oscillations in the upper atmosphere

G3C11

4. Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

• A. The F2 region
• B. The F1 region
• C. The D region
• D. The E region

G1B02

5. With which of the following conditions must beacon stations comply?

• A. The frequency must be coordinated with the National Beacon Organization
• B. The frequency must be posted on the internet or published in a national periodical
• C. No more than one beacon station may transmit in the same band from the same station location
• D. All these choices are correct

G2A03

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

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

G7B11

7. For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

• A. FM
• B. SSB
• C. All these choices are correct
• D. AM

G8C11

8. How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

• A. On and off
• B. Dot and dash
• C. Mark and space
• D. High and low

G9B04

9. What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

• A. It has a pair of lobes on one side of the antenna and a single lobe on the other side
• B. It is a figure-eight at right angles to the antenna
• C. It is a circle (equal radiation in all directions)
• D. It is a figure-eight off both ends of the antenna

G4C05

10. What is a possible cause of high voltages that produce RF burns?

• A. The ground rod is resonant
• B. The ground wire has high impedance on that frequency
• C. Flat braid rather than round wire has been used for the ground wire
• D. Insulated wire has been used for the ground wire

G8A09

11. What type of modulation is used by FT8?

• A. 8-tone frequency shift keying
• B. 8-bit direct sequence spread spectrum
• C. Vestigial sideband
• D. Amplitude compressed AM

G4B08

12. What transmitter performance parameter does a two-tone test analyze?

• A. Percentage of carrier phase shift
• B. Percentage of frequency modulation
• C. Linearity
• D. Percentage of suppression of the carrier and undesired sideband for SSB

G9A05

13. How does the attenuation of coaxial cable change with increasing frequency?

• A. Attenuation decreases
• B. Attenuation follows Marconi's Law of Attenuation
• C. Attenuation increases
• D. Attenuation is independent of frequency

G1D12

14. When operating a station in South America by remote control over the internet from the US, what regulations apply?

• A. Those of the remote station's country and the FCC's third-party regulations
• B. Only those of the remote station's country
• C. Only those of the FCC
• D. Those of both the remote station's country and the FCC

G1C06

15. What is the limit for transmitter power on the 1.8 MHz band?

• A. 200 watts PEP output
• B. 1000 watts PEP output
• C. 1200 watts PEP output
• D. 1500 watts PEP output

G8B10

16. What is the relationship between transmitted symbol rate and bandwidth?

• A. Bandwidth is half the symbol rate
• B. Higher symbol rates require wider bandwidth
• C. Lower symbol rates require wider bandwidth
• D. Symbol rate and bandwidth are not related

G1A01

17. On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

• A. 60 meters, 30 meters, 17 meters, and 12 meters
• B. 80 meters, 20 meters, 15 meters, and 10 meters
• C. 160 meters, 60 meters, 15 meters, and 12 meters
• D. 80 meters, 40 meters, 20 meters, and 15 meters

G5A11

18. What letter is used to represent reactance?

• A. X
• B. Z
• C. Y
• D. B

G6A02

19. What is an advantage of batteries with low internal resistance?

• A. Long life
• B. High voltage
• C. High discharge current
• D. Rapid recharge

G4A01

20. What is the purpose of the notch filter found on many HF transceivers?

• A. To eliminate receiver interference from impulse noise sources
• B. To reduce interference from carriers in the receiver passband
• C. To remove interfering splatter generated by signals on adjacent frequencies
• D. To restrict the transmitter voice bandwidth

G0B01

21. Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

• A. Only the hot wires
• B. Only the ground wire
• C. All wires
• D. Only the neutral wire

G0A05

22. What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

• A. File an Environmental Impact Statement (EIS-97) with the FCC
• B. Secure written permission from your neighbors to operate above the controlled MPE limits
• C. Take action to prevent human exposure to the excessive RF fields
• D. All these choices are correct

G1E06

23. The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

• A. Region 3
• B. Region 1
• C. Region 2
• D. Region 4

G2B03

24. What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

• A. Advise the interfering stations that you are on the frequency and that you have priority
• B. Decrease power and continue to transmit
• C. Switch to the opposite sideband
• D. Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

G2D05

25. Which of the following indicates that you are looking for an HF contact with any station?

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

G5B10

26. What percentage of power loss is equivalent to a loss of 1 dB?

• A. 25.9 percent
• B. 20.6 percent
• C. 12.2 percent
• D. 10.9 percent

G2C04

27. What does the Q signal "QRL?" mean?

• A. "Are you busy?" or "Is this frequency in use?"
• B. "Are you listening only for a specific station?"
• C. "Are you operating full break-in?" or "Can you operate full break-in?"
• D. "Will you keep the frequency clear?"

G4D09

28. What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

• A. 14.344 MHz to 14.347 MHz
• B. 14.347 MHz to 14.647 MHz
• C. 14.3455 MHz to 14.3485 MHz
• D. 14.347 MHz to 14.350 MHz

G9C08

29. What is meant by the "main lobe" of a directive antenna?

• A. The point of maximum current in a radiating antenna element
• B. The magnitude of the maximum vertical angle of radiation
• C. The maximum voltage standing wave point on a radiating element
• D. The direction of maximum radiated field strength from the antenna

G9D11

30. Which of the following is a disadvantage of multiband antennas?

• A. They must be fed with open wire line
• B. They have poor harmonic rejection
• C. They present low impedance on all design frequencies
• D. They must be used with an antenna tuner

G7A04

31. What is characteristic of a half-wave rectifier in a power supply?

• A. Only one diode is required
• B. The ripple frequency is twice that of a full-wave rectifier
• C. The output voltage is two times the peak input voltage
• D. More current can be drawn from the half-wave rectifier

G4E08

32. In what configuration are the individual cells in a solar panel connected together?

• A. Shunt
• B. Bypass
• C. Series-parallel
• D. Full-wave bridge

G5C01

33. What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

• A. Capacitive coupling
• B. Mutual capacitance
• C. Displacement current coupling
• D. Mutual inductance

G6B11

34. What is an SMA connector?

• A. A connector designed for serial multiple access signals
• B. A small threaded connector suitable for signals up to several GHz
• C. A type-S to type-M adaptor
• D. A type of push-on connector intended for high-voltage applications

G2E06

35. What is the most common frequency shift for RTTY emissions in the amateur HF bands?

• A. 85 Hz
• B. 425 Hz
• C. 850 Hz
• D. 170 Hz