Practice Exam

G8A06

1. Which of the following is characteristic of QPSK31?

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

G8B08

2. Why is it important to know the duty cycle of the mode you are using when transmitting?

• A. To allow time for the other station to break in during a transmission
• B. Some modes have high duty cycles that could exceed the transmitter's average power rating
• C. To aid in tuning your transmitter
• D. To prevent overmodulation

G4D03

3. What is the effect of an incorrectly adjusted speech processor?

• A. Distorted speech
• B. Excess intermodulation products
• C. Excessive background noise
• D. All these choices are correct

G3A10

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

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

G3B07

5. What does LUF stand for?

• A. The Lowest Usable Frequency during a 24-hour period
• B. The Lowest Usable Frequency for communications between two specific points
• C. Lowest Usable Frequency for communications to any point outside a 100-mile radius
• D. Lowest Usable Frequency during the past 60 minutes

G4C06

6. What is a possible effect of a resonant ground connection?

• A. A ground loop
• B. High RF voltages on the enclosures of station equipment
• C. Overheating of ground straps
• D. Corrosion of the ground rod

G9A10

7. What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

• A. 1:5
• B. 5:1
• C. 1:2
• D. 2:1

G5C11

8. What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

• A. 7 millihenries
• B. 14.3 millihenries
• C. 70 millihenries
• D. 1,000 millihenries

G8C02

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

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

G7C14

10. The bandwidth of a band-pass filter is measured between what two frequencies?

• A. Cutoff and rolloff
• B. Image and harmonic
• C. Upper and lower half-power
• D. Pole and zero

G3C06

11. What is a characteristic of HF scatter?

• A. Phone signals have high intelligibility
• B. Scatter propagation occurs only at night
• C. There are very large, sudden swings in signal strength
• D. Signals have a fluttering sound

G5A09

12. What unit is used to measure reactance?

• A. Siemens
• B. Ohm
• C. Ampere
• D. Farad

G1E12

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

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

G2C06

14. What does the term "zero beat" mean in CW operation?

• A. Sending without error
• B. Matching the transmit frequency to the frequency of a received signal
• C. Matching the speed of the transmitting station
• D. Operating split to avoid interference on frequency

G1C07

15. What must be done before using a new digital protocol on the air?

• A. Obtain an experimental license from the FCC
• B. Type-certify equipment to FCC standards
• C. Publicly document the technical characteristics of the protocol
• D. Submit a rule-making proposal to the FCC describing the codes and methods of the technique

G2A07

16. Which of the following statements is true of single sideband (SSB)?

• A. SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
• B. Only one sideband and the carrier are transmitted; the other sideband is suppressed
• C. Only one sideband is transmitted; the other sideband and carrier are suppressed
• D. SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands

G6A03

17. What is the approximate forward threshold voltage of a germanium diode?

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

G2B09

18. Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

• A. Only a RACES net control operator
• B. Only a person holding an FCC-issued amateur operator license
• C. Any control operator when normal communication systems are operational
• D. A person holding an FCC-issued amateur operator license or an appropriate government official

G7A02

19. Which of the following components are used in a power supply filter network?

• A. Diodes
• B. Capacitors and inductors
• C. All these choices are correct
• D. Transformers and transducers

G6B03

20. Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

• A. Better suited for RF amplification
• B. High power handling capability
• C. Better suited for power supply regulation
• D. Low power consumption

G1A06

21. Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

• A. Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
• B. Amateur stations may use the band only during emergencies
• C. Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
• D. Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band

G5B10

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

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

G1D05

23. When operating a US station by remote control from outside the country, what license is required of the control operator?

• A. Only an appropriate US operator/primary license and a special remote station permit from the FCC
• B. A license from the foreign country and a special remote station permit from the FCC
• C. A US operator/primary station license
• D. Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

G2D01

24. What is the Volunteer Monitor Program?

• A. Amateur volunteers who conduct amateur licensing examinations
• B. Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
• C. Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
• D. Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

G4A06

25. What is the purpose of an antenna tuner?

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

G4B05

26. Why do voltmeters have high input impedance?

• A. It decreases the loading on circuits being measured
• B. It improves the resolution of the readings
• C. It improves the frequency response
• D. It allows for higher voltages to be safely measured

G9B02

27. Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?

• A. Coil the radials
• B. Slope the radials upward
• C. Slope the radials downward
• D. Lengthen the radials beyond one wavelength

G4E07

28. Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

• A. The fuel delivery system
• B. The control computers
• C. The battery charging system
• D. All these choices are correct

G1B06

29. Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

• A. Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
• B. At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
• C. Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
• D. Under no circumstances, FCC rules take priority

G9C10

30. Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

• A. The physical length of the boom
• B. All these choices are correct
• C. The number of elements on the boom
• D. The spacing of each element along the boom

G7B07

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

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

G9D04

32. What is the primary function of antenna traps?

• A. To provide balanced feed point impedance
• B. To prevent out-of-band operation
• C. To notch spurious frequencies
• D. To enable multiband operation

G0B05

33. Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

• A. Overvoltage on the hot wires
• B. All these choices are correct
• C. Current flowing from one or more of the hot wires to the neutral wire
• D. Current flowing from one or more of the hot wires directly to ground

G0A02

34. Which of the following is used to determine RF exposure from a transmitted signal?

• A. Its power density
• B. All these choices are correct
• C. Its duty cycle
• D. Its frequency

G2E07

35. Which of the following is required when using FT8?

• A. Computer time accurate to within approximately 1 second
• B. Receiver attenuator set to -12 dB
• C. A vertically polarized antenna
• D. A special hardware modem