Practice Exam

G9C08

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

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

G2B07

2. Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

• A. Listen on the frequency for at least two minutes to be sure it is clear
• B. All these choices are correct
• C. Identify your station by transmitting your call sign at least 3 times
• D. Follow the voluntary band plan

G9A04

3. What causes reflected power at an antenna's feed point?

• A. Using more transmitter power than the antenna can handle
• B. A difference between feed line impedance and antenna feed point impedance
• C. Operating an antenna at its resonant frequency
• D. Feeding the antenna with unbalanced feed line

G8A07

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

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

G3B03

5. Which frequency will have the least attenuation for long-distance skip propagation?

• A. Just above the critical frequency
• B. Just below the critical frequency
• C. Just above the LUF
• D. Just below the MUF

G7C02

6. What output is produced by a balanced modulator?

• A. Double-sideband modulated RF
• B. Audio with equalized frequency response
• C. Audio extracted from the modulation signal
• D. Frequency modulated RF

G0A11

7. What precaution should be taken if you install an indoor transmitting antenna?

• A. Position the antenna along the edge of a wall to reduce parasitic radiation
• B. Locate the antenna close to your operating position to minimize feed-line radiation
• C. Make sure that MPE limits are not exceeded in occupied areas
• D. Make sure the antenna is properly shielded

G6B01

8. What determines the performance of a ferrite core at different frequencies?

• A. Its conductivity
• B. The composition, or "mix," of materials used
• C. The ratio of outer diameter to inner diameter
• D. Its thickness

G1C11

9. What measurement is specified by FCC rules that regulate maximum power?

• A. PEP input to the antenna
• B. RMS output from the transmitter
• C. PEP output from the transmitter
• D. RMS input to the antenna

G1B02

10. 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. All these choices are correct
• D. No more than one beacon station may transmit in the same band from the same station location

G9D01

11. Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

• A. A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
• B. A horizontal dipole placed at approximately 1/2 wavelength above the ground
• C. A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
• D. A vertical dipole placed at approximately 1/2 wavelength above the ground

G5C03

12. What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

• A. 0.17 ohms
• B. 5.9 ohms
• C. 17 ohms
• D. 80 ohms

G7B11

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

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

G8C02

14. Which digital mode is used as a low-power beacon for assessing HF propagation?

• A. SSB-SC
• B. WSPR
• C. PSK31
• D. MFSK16

G4B04

15. What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

• A. The attenuated RF output of the transmitter
• B. The transmitter balanced mixer output
• C. An external RF oscillator
• D. The local oscillator of the transmitter

G4D07

16. How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

• A. Approximately 8 times
• B. Approximately 2 times
• C. Approximately 4 times
• D. Approximately 1.5 times

G2A09

17. Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

• A. Lower sideband is more efficient than upper sideband at these frequencies
• B. Lower sideband is the only sideband legal on these frequency bands
• C. It is commonly accepted amateur practice
• D. Because it is fully compatible with an AM detector

G4E05

18. Which of the following most limits an HF mobile installation?

• A. Efficiency of the electrically short antenna
• B. FCC rules limiting mobile output power on the 75-meter band
• C. The wire gauge of the DC power line to the transceiver
• D. "Picket fencing"

G6A05

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

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

G2E05

20. What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

• A. SSB
• B. LSB
• C. DSB
• D. USB

G3A04

21. Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

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

G0B02

22. According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

• A. AWG number 12
• B. AWG number 16
• C. AWG number 8
• D. AWG number 20

G1D01

23. Who may receive partial credit for the elements represented by an expired amateur radio license?

• A. Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
• B. Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
• C. Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago
• D. Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC

G2C03

24. What does it mean when a CW operator sends "KN" at the end of a transmission?

• A. No US stations should call
• B. Operating full break-in
• C. Listening only for a specific station or stations
• D. Closing station now

G8B03

25. What is another term for the mixing of two RF signals?

• A. Frequency inversion
• B. Phase inversion
• C. Synthesizing
• D. Heterodyning

G3C07

26. What makes HF scatter signals often sound distorted?

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

G1A03

27. On which of the following bands is image transmission prohibited?

• A. 30 meters
• B. 20 meters
• C. 160 meters
• D. 12 meters

G4C10

28. What could be a symptom caused by a ground loop in your station's audio connections?

• A. The SWR reading for one or more antennas is suddenly very high
• B. You receive reports of "hum" on your station's transmitted signal
• C. An item of station equipment starts to draw excessive amounts of current
• D. You receive reports of harmonic interference from your station

G2D10

29. What is QRP operation?

• A. Low-power transmit operation
• B. Traffic relay procedure net operation
• C. Transmission using Quick Response Protocol
• D. Remote piloted model control

G1E07

30. In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

• A. Channels 1 through 4
• B. Channels 42 through 45
• C. No part
• D. Anywhere in the band

G7A05

31. What portion of the AC cycle is converted to DC by a half-wave rectifier?

• A. 90 degrees
• B. 180 degrees
• C. 270 degrees
• D. 360 degrees

G4A05

32. Why is automatic level control (ALC) used with an RF power amplifier?

• A. To prevent excessive drive
• B. To balance the transmitter audio frequency response
• C. To increase overall efficiency
• D. To reduce harmonic radiation

G5A04

33. Which of the following is opposition to the flow of alternating current in a capacitor?

• A. Reluctance
• B. Admittance
• C. Conductance
• D. Reactance

G9B04

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

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

G5B01

35. What dB change represents a factor of two increase or decrease in power?

• A. Approximately 2 dB
• B. Approximately 9 dB
• C. Approximately 3 dB
• D. Approximately 6 dB