Practice Exam

G3C10

1. What is Near Vertical Incidence Skywave (NVIS) propagation?

• A. Long path HF propagation at sunrise and sunset
• B. Short distance MF or HF propagation using high elevation angles
• C. Double hop propagation near the LUF
• D. Propagation near the MUF

G9B12

2. What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?

• A. 16 feet
• B. 11 feet
• C. 21 feet
• D. 8 feet

G9C04

3. How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna?

• A. dBi gain figures are 2.15 dB lower than dBd gain figures
• B. dBi gain figures are 2.15 dB higher than dBd gain figures
• C. dBi gain figures are the same as the square root of dBd gain figures multiplied by 2.15
• D. dBi gain figures are the reciprocal of dBd gain figures + 2.15 dB

G1E03

4. What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

• A. The station initiating the contact must be under local or remote control
• B. No third-party traffic may be transmitted
• C. The interrogating transmission must be made by another automatically controlled station
• D. The control operator of the interrogating station must hold an Amateur Extra Class license

G3A04

5. Which of the following are least reliable 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

G4C03

6. What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

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

G6B04

7. What is meant by the term ROM?

• A. Resistant to Overload Memory
• B. Read Only Memory
• C. Resistor Operated Memory
• D. Random Operational Memory

G4D08

8. What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

• A. 7.178 to 7.184 MHz
• B. 7.1765 to 7.1795 MHz
• C. 7.178 to 7.181 MHz
• D. 7.175 to 7.178 MHz

G7C02

9. Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

• A. IF amplifier
• B. Balanced modulator
• C. Detector
• D. Discriminator

G2B02

10. What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

• A. Continue your communication because you were on the frequency first
• B. Acknowledge the station in distress and determine what assistance may be needed
• C. Immediately cease all transmissions
• D. Change to a different frequency

G3B04

11. What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

• A. Check the strength of TV signals from western Europe
• B. Listen for signals from an international beacon in the frequency range you plan to use
• C. Check the strength of signals in the MF AM broadcast band
• D. Send a series of dots on the band and listen for echoes from your signal

G2D06

12. How is a directional antenna pointed when making a "long-path" contact with another station?

• A. Toward the rising sun
• B. Along the grayline
• C. 180 degrees from the station's short-path heading
• D. Toward the north

G9A04

13. What might cause reflected power at the point where a feed line connects to an antenna?

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

G6A04

14. Which of the following is an advantage of an electrolytic capacitor?

• A. Inexpensive RF capacitor
• B. Tight tolerance
• C. Much less leakage than any other type
• D. High capacitance for a given volume

G8B02

15. If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

• A. Intermediate interference
• B. Mixer interference
• C. Quadrature noise
• D. Image response

G2A05

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

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

G1C11

17. What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

• A. 56 kilobaud
• B. 300 baud
• C. 19.6 kilobaud
• D. 1200 baud

G0B08

18. What should be done by any person preparing to climb a tower that supports electrically powered devices?

• A. Unground the base of the tower
• B. Make sure all circuits that supply power to the tower are locked out and tagged
• C. Notify the electric company that a person will be working on the tower
• D. All these choices are correct

G4B12

19. What problem can occur when making measurements on an antenna system with an antenna analyzer?

• A. Permanent damage to the analyzer may occur if it is operated into a high SWR
• B. Connecting the analyzer to an antenna can cause it to absorb harmonics
• C. The analyzer can be damaged if measurements outside the ham bands are attempted
• D. Strong signals from nearby transmitters can affect the accuracy of measurements

G7B09

20. What determines the frequency of an LC oscillator?

• A. The number of stages in the divider
• B. The inductance and capacitance in the tank circuit
• C. The time delay of the lag circuit
• D. The number of stages in the counter

G1D09

21. How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

• A. For as long as your current license is valid
• B. 365 days
• C. 180 days
• D. 30 days

G8A06

22. Which of the following is characteristic of QPSK31?

• A. Its encoding provides error correction
• B. Its bandwidth is approximately the same as BPSK31
• C. It is sideband sensitive
• D. All these choices are correct

G1B02

23. Which of the following is true concerning access to frequencies?

• A. QSOs in progress always have priority
• B. Nets always have priority
• C. Contest operations must always yield to non-contest use of frequencies
• D. Except during emergencies, no amateur station has priority access to any frequency

G0A04

24. What does "time averaging" mean in reference to RF radiation exposure?

• A. The total time of the exposure
• B. The average time it takes RF radiation to have any long-term effect on the body
• C. The total RF exposure averaged over a certain time
• D. The average amount of power developed by the transmitter over a specific 24-hour period

G5B04

25. How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?

• A. 6 watts
• B. 2.4 watts
• C. 60 watts
• D. 24 watts

G5A07

26. What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?

• A. The source can deliver maximum power to the load
• B. No current can flow through the circuit
• C. The electrical load is shorted
• D. The source delivers minimum power to the load

G2C01

27. Which of the following describes full break-in telegraphy (QSK)?

• A. Breaking stations send the Morse code prosign "BK"
• B. Automatic keyers, instead of hand keys, are used to send Morse code
• C. An operator must activate a manual send/receive switch before and after every transmission
• D. Transmitting stations can receive between code characters and elements

G7A03

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

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

G5C01

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

G4A07

30. What condition can lead to permanent damage to a solid-state RF power amplifier?

• A. Insufficient drive power
• B. Excessive drive power
• C. Low input SWR
• D. Shorting the input signal to ground

G1A04

31. Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

• A. 11 meters
• B. 30 meters
• C. 12 meters
• D. 60 meters

G4E06

32. What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

• A. Short antennas are more likely to cause distortion of transmitted signals
• B. Harmonic radiation may increase
• C. Short antennas can only receive circularly polarized signals
• D. Operating bandwidth may be very limited

G2E11

33. Which of the following is characteristic of the FT8 mode of the WSJT-X family?

• A. It is a keyboard-to-keyboard chat mode
• B. Each transmission takes exactly 60 seconds
• C. It is limited to use on VHF
• D. Typical exchanges are limited to call signs, grid locators, and signal reports

G8C02

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

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

G9D11

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

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