Practice Exam

G4A09

1. What is the purpose of delaying RF output after activating a transmitter's keying line to an external amplifier?

• A. To prevent transient overmodulation
• B. To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
• C. To allow time for the amplifier power supply to reach operating level
• D. To prevent key clicks on CW

G8C13

2. What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

• A. Long path propagation
• B. Overmodulation
• C. Insufficient modulation
• D. Backscatter propagation

G7B05

3. How many states does a 3-bit binary counter have?

• A. 6
• B. 8
• C. 16
• D. 3

G1B03

4. Which of the following is a purpose of a beacon station as identified in the FCC rules?

• A. All these choices are correct
• B. Transmission of bulletins of general interest to amateur radio licensees
• C. Observation of propagation and reception
• D. Automatic identification of repeaters

G9A01

5. Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

• A. The radius of the conductors and the frequency of the signal
• B. The distance between the centers of the conductors and the length of the line
• C. The frequency of the signal and the length of the line
• D. The distance between the centers of the conductors and the radius of the conductors

G5C10

6. What is the inductance of three 10-millihenry inductors connected in parallel?

• A. 30 millihenries
• B. 3.3 henries
• C. 3.3 millihenries
• D. 0.30 henries

G6A08

7. Which of the following is characteristic of low voltage ceramic capacitors?

• A. Comparatively low cost
• B. High capacitance for given volume
• C. Tight tolerance
• D. High stability

G2B07

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

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

G8A03

9. What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

• A. Frequency convolution
• B. Frequency transformation
• C. Frequency conversion
• D. Frequency modulation

G7A04

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

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

G2C11

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

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

G2D02

12. Which of the following are objectives of the Volunteer Monitor Program?

• A. To encourage amateur radio operators to self-regulate and comply with the rules
• B. To coordinate repeaters for efficient and orderly spectrum usage
• C. To provide emergency and public safety communications
• D. To conduct efficient and orderly amateur licensing examinations

G2A07

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

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

G3B02

14. What factors affect the MUF?

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

G1D12

15. 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

G6B03

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

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

G4C05

17. 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

G8B03

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

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

G3C02

19. What is meant by the term "critical frequency" at a given incidence angle?

• A. The frequency at which the signal-to-noise ratio approaches unity
• B. The frequency at which the signal-to-noise ratio is 6 dB
• C. The lowest frequency which is refracted back to Earth
• D. The highest frequency which is refracted back to Earth

G9D07

20. Which of the following describes a log-periodic antenna?

• A. Impedance varies periodically as a function of frequency
• B. SWR varies periodically as a function of boom length
• C. Element length and spacing vary logarithmically along the boom
• D. Gain varies logarithmically as a function of frequency

G4E10

21. Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

• A. To prevent overload by regulating the charging voltage
• B. To prevent discharge of the battery through the panel during times of low or no illumination
• C. To limit the current flowing from the panel to a safe value
• D. To prevent damage to the battery due to excessive voltage at high illumination levels

G5A01

22. What happens when inductive and capacitive reactance are equal in a series LC circuit?

• A. Resonance causes impedance to be very high
• B. Impedance is equal to the arithmetic mean of the inductance and capacitance
• C. Impedance is equal to the geometric mean of the inductance and capacitance
• D. Resonance causes impedance to be very low

G2E07

23. 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 special hardware modem
• D. A vertically polarized antenna

G7C04

24. How is a product detector used?

• A. Used in transmitter to perform frequency multiplication
• B. Used in an FM receiver to filter out unwanted sidebands
• C. Used in a single sideband receiver to extract the modulated signal
• D. Used in test gear to detect spurious mixing products

G1E04

25. Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

• A. When operating within one mile of an FCC Monitoring Station
• B. When using a band where the Amateur Service is secondary
• C. When a station is transmitting spread spectrum emissions
• D. All these choices are correct

G1A07

26. On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

• A. The entire band
• B. 28.025 MHz to 28.300 MHz only
• C. 28.000 MHz to 28.300 MHz only
• D. 28.000 MHz to 28.025 MHz only

G9C11

27. What is a beta or hairpin match?

• A. A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
• B. A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
• C. A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
• D. A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

G5B13

28. What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

• A. 1060 watts
• B. 2120 watts
• C. 1500 watts
• D. 530 watts

G1C03

29. What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

• A. 5.6 kHz
• B. 2.8 kHz
• C. 3 kHz
• D. 1.8 kHz

G9B08

30. How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

• A. It steadily decreases
• B. It peaks at about 1/8 wavelength from the end
• C. It is unaffected by the location of the feed point
• D. It steadily increases

G4D01

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

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

G0B10

32. Which of the following is a danger from lead-tin solder?

• A. Lead can contaminate food if hands are not washed carefully after handling the solder
• B. High voltages can cause lead-tin solder to disintegrate suddenly
• C. Tin in the solder can "cold flow," causing shorts in the circuit
• D. RF energy can convert the lead into a poisonous gas

G4B03

33. Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

• A. A wavemeter
• B. A field strength meter
• C. A sidetone monitor
• D. An oscilloscope

G0A11

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

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

G3A03

35. Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

• A. 1 to 2 hours
• B. 8 minutes
• C. 28 days
• D. 20 to 40 hours