Practice Exam

G7A10

1. Which symbol in figure G7-1 represents a Zener diode?

• A. Symbol 5
• B. Symbol 1
• C. Symbol 4
• D. Symbol 11

G4C03

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

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

G1C06

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

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

G8A13

4. What is a link budget?

• A. The sum of transmit power and antenna gains minus system losses as seen at the receiver
• B. The sum of antenna gains minus system losses
• C. The difference between transmit power and receiver sensitivity
• D. The financial costs associated with operating a radio link

G0B03

5. Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

• A. 20 amperes
• B. 30 amperes
• C. 25 amperes
• D. 15 amperes

G2E11

6. What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

• A. To provide high-speed data services during an emergency or community event
• B. To provide FM repeater coverage in remote areas
• C. To provide DX spotting reports to aid contesters and DXers
• D. To provide real time propagation data by monitoring amateur radio transmissions worldwide

G9D10

7. In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

• A. Broadside and in the plane of the loop
• B. Broadside to the loop
• C. Electrically small loops are omnidirectional
• D. In the plane of the loop

G7B07

8. Which of the following are basic components of a sine wave oscillator?

• A. A frequency multiplier and a mixer
• B. An amplifier and a divider
• C. A filter and an amplifier operating in a feedback loop
• D. A circulator and a filter operating in a feed-forward loop

G2C11

9. What does the Q signal "QRV" mean?

• A. I am quitting for the day
• B. You are sending too fast
• C. There is interference on the frequency
• D. I am ready to receive

G7C03

10. What is one reason to use an impedance matching transformer at a transmitter output?

• A. To minimize radiation resistance
• B. To present the desired impedance to the transmitter and feed line
• C. To minimize transmitter power output
• D. To reduce power supply ripple

G1D12

11. 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 FCC
• C. Those of both the remote station's country and the FCC
• D. Only those of the remote station's country

G6B01

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

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

G4B11

13. Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

• A. Antenna and feed line
• B. All these choices are correct
• C. Transmitter
• D. Receiver

G1E12

14. When may third-party messages be transmitted via remote control?

• A. Only when the message is intended for third parties in areas where licensing is controlled by the FCC
• B. Under any circumstances in which third party messages are permitted by FCC rules
• C. Only when the message is intended for licensed radio amateurs
• D. Under no circumstances except for emergencies

G1B04

15. Which of the following transmissions is permitted for all amateur stations?

• A. Encrypted messages, if not intended to facilitate a criminal act
• B. Unidentified transmissions of less than 10 seconds duration for test purposes only
• C. Automatic retransmission of other amateur signals by any amateur station
• D. Occasional retransmission of weather and propagation forecast information from US government stations

G4D01

16. What is the purpose of a speech processor in a transceiver?

• A. Increase transmitter bass response for more natural-sounding SSB signals
• B. Prevent distortion of voice signals
• C. Increase the apparent loudness of transmitted voice signals
• D. Decrease high-frequency voice output to prevent out-of-band operation

G2A05

17. Which mode of voice communication is most commonly used on the HF amateur bands?

• A. Double sideband
• B. Frequency modulation
• C. Single sideband
• D. Single phase modulation

G1A05

18. On which of the following frequencies are General class licensees prohibited from operating as control operator?

• A. 21.275 MHz to 21.300 MHz
• B. 7.125 MHz to 7.175 MHz
• C. All of the above
• D. 28.000 MHz to 28.025 MHz

G3B02

19. What factors affect the MUF?

• A. Time of day and season
• B. All these choices are correct
• C. Solar radiation and ionospheric disturbances
• D. Path distance and location

G3C05

20. Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

• A. The F region absorbs signals at these frequencies during daylight hours
• B. The E region is unstable during daylight hours
• C. The D region absorbs signals at these frequencies during daylight hours
• D. The F region is unstable during daylight hours

G6A05

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

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

G9B07

22. How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

• A. It is unaffected by the height above ground
• B. It peaks at about 1/8 wavelength above ground
• C. It steadily increases
• D. It steadily decreases

G5A05

23. How does an inductor react to AC?

• A. As the frequency of the applied AC increases, the reactance increases
• B. As the amplitude of the applied AC increases, the reactance increases
• C. As the amplitude of the applied AC increases, the reactance decreases
• D. As the frequency of the applied AC increases, the reactance decreases

G0A11

24. 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. Make sure the antenna is properly shielded
• C. Make sure that MPE limits are not exceeded in occupied areas
• D. Locate the antenna close to your operating position to minimize feed-line radiation

G2B05

25. When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

• A. 150 Hz to 500 Hz
• B. Approximately 6 kHz
• C. 2 kHz to 3 kHz
• D. 5 Hz to 50 Hz

G4A02

26. What is the benefit of using the opposite or "reverse" sideband when receiving CW?

• A. Interference from impulse noise will be eliminated
• B. More stations can be accommodated within a given signal passband
• C. Accidental out-of-band operation can be prevented
• D. It may be possible to reduce or eliminate interference from other signals

G4E05

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

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

G9C01

28. Which of the following would increase the bandwidth of a Yagi antenna?

• A. Tapered-diameter elements
• B. Closer element spacing
• C. Loading coils in series with the element
• D. Larger-diameter elements

G8C07

29. Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

• A. AMTOR
• B. MFSK32
• C. FT8
• D. MSK144

G5B09

30. What is the RMS voltage of a sine wave with a value of 17 volts peak?

• A. 34 volts
• B. 8.5 volts
• C. 24 volts
• D. 12 volts

G2D08

31. Why do many amateurs keep a station log?

• A. The FCC requires a log of all international third-party traffic
• B. To help with a reply if the FCC requests information about your station
• C. The log provides evidence of operation needed to renew a license without retest
• D. The FCC requires a log of all international contacts

G9A07

32. What must be done to prevent standing waves on a feed line connected to an antenna?

• A. The antenna feed point impedance must be matched to the characteristic impedance of the feed line
• B. The antenna feed point must be at DC ground potential
• C. The feed line must be an even number of physical half wavelengths long
• D. The feed line must be an odd number of electrical quarter wavelengths long

G3A02

33. What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

• A. It enhances propagation on all HF frequencies
• B. It disrupts communications via satellite more than direct communications
• C. It disrupts signals on lower frequencies more than those on higher frequencies
• D. None, because only areas on the night side of the Earth are affected

G8B07

34. What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

• A. 60 kHz
• B. 416.7 Hz
• C. 101.75 Hz
• D. 5 kHz

G5C01

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