Practice Exam

G7A05

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

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

G2D03

2. What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

• A. All these choices are correct
• B. Compare signal strengths between the input and output of the repeater
• C. Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
• D. Compare vertical and horizontal signal strengths on the input frequency

G5C08

3. What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

• A. 1,733 picofarads
• B. 3,583 picofarads
• C. 10.750 nanofarads
• D. 576.9 nanofarads

G4B02

4. Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

• A. An oscilloscope uses less power
• B. Greater precision
• C. Complex impedances can be easily measured
• D. Complex waveforms can be measured

G9C02

5. What is the approximate length of the driven element of a Yagi antenna?

• A. 1/2 wavelength
• B. 3/4 wavelength
• C. 1/4 wavelength
• D. 1 wavelength

G2A03

6. Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

• A. Double sideband
• B. Upper sideband
• C. Lower sideband
• D. Suppressed sideband

G7C06

7. Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

• A. Mixing products are greatly reduced
• B. The DSP filter is much more effective at VHF frequencies
• C. A wide range of filter bandwidths and shapes can be created
• D. Fewer digital components are required

G6B10

8. How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

• A. By creating an out-of-phase current to cancel the common-mode current
• B. By creating an impedance in the current's path
• C. Ferrites expel magnetic fields
• D. It converts common-mode current to differential mode current

G6A11

9. What happens when an inductor is operated above its self-resonant frequency?

• A. Harmonics are generated
• B. It becomes capacitive
• C. Its reactance increases
• D. Catastrophic failure is likely

G5B12

10. What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

• A. 346 volts
• B. 173 volts
• C. 245 volts
• D. 692 volts

G7B01

11. What is the purpose of neutralizing an amplifier?

• A. To cut off the final amplifier during standby periods
• B. To eliminate self-oscillations
• C. To limit the modulation index
• D. To keep the carrier on frequency

G4E01

12. What is the purpose of a capacitance hat on a mobile antenna?

• A. To lower the radiation angle
• B. To reduce radiation resistance
• C. To increase the power handling capacity of a whip antenna
• D. To electrically lengthen a physically short antenna

G1B08

13. When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

• A. When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
• B. Only when the foreign country has a formal third-party agreement filed with the FCC
• C. Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
• D. Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country

G8C06

14. What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

• A. Encoding reverts to the default character set
• B. The connection is dropped
• C. Packets will be routed incorrectly
• D. The checksum overflows

G4A11

15. Why should the ALC system be inactive when transmitting AFSK data signals?

• A. All these choices are correct
• B. The ALC action distorts the signal
• C. ALC will invert the modulation of the AFSK mode
• D. When using digital modes, too much ALC activity can cause the transmitter to overheat

G3A05

16. What is the solar flux index?

• A. A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
• B. A measure of solar radiation with a wavelength of 10.7 centimeters
• C. Another name for the American sunspot number
• D. A count of sunspots that is adjusted for solar emissions

G8B02

17. What is the term for interference from a signal at twice the IF frequency from the desired signal?

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

G9B07

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

G0B13

19. Where should lightning arrestors be located?

• A. Where the feed lines enter the building
• B. In series with each ground lead
• C. On the antenna, opposite the feed point
• D. At the closest power pole ground electrode

G2B04

20. When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

• A. 1 kHz to 3 kHz
• B. 3 kHz to 6 kHz
• C. 5 Hz to 50 Hz
• D. 150 Hz to 500 Hz

G1E07

21. 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. No part
• C. Anywhere in the band
• D. Channels 42 through 45

G1A08

22. Which HF bands have segments exclusively allocated to Amateur Extra licensees?

• A. 80 meters, 40 meters, 20 meters, and 15 meters
• B. All HF bands
• C. 60 meters, 30 meters, 17 meters, and 12 meters
• D. All HF bands except 160 meters and 10 meters

G4C07

23. Why should soldered joints not be used in lightning protection ground connections?

• A. Solder flux will prevent a low conductivity connection
• B. A soldered joint will likely be destroyed by the heat of a lightning strike
• C. All these choices are correct
• D. Solder has too high a dielectric constant to provide adequate lightning protection

G2C01

24. Which of the following describes full break-in CW operation (QSK)?

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

G9D08

25. How does a "screwdriver" mobile antenna adjust its feed point impedance?

• A. By deploying a capacitance hat
• B. By varying the base loading inductance
• C. By varying its body capacitance
• D. By extending and retracting the whip

G3C02

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

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

G0A03

27. How can you determine that your station complies with FCC RF exposure regulations?

• A. By calculation based on computer modeling
• B. By measurement of field strength using calibrated equipment
• C. By calculation based on FCC OET Bulletin 65
• D. All these choices are correct

G3B03

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

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

G2E04

29. Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

• A. Find a clear frequency during the same time slot as the calling station
• B. Call on any frequency in the waterfall except the station's frequency
• C. Find a clear frequency during the alternate time slot to the calling station
• D. Always call on the station's frequency

G9A08

30. If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

• A. Between 1:1 and 5:1 depending on the reflected power at the transmitter
• B. 5:1
• C. 1:1
• D. Between 1:1 and 5:1 depending on the characteristic impedance of the line

G1D12

31. When operating a station in South America by remote control over the internet from the US, what regulations apply?

• A. Only those of the remote station's country
• B. Only those of the FCC
• C. Those of the remote station's country and the FCC's third-party regulations
• D. Those of both the remote station's country and the FCC

G8A12

32. What is QPSK modulation?

• A. Modulation using quasi-parallel to serial conversion to reduce bandwidth
• B. Modulation using quadra-pole sideband keying to generate spread spectrum signals
• C. Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits
• D. Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity

G5A09

33. What unit is used to measure reactance?

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

G4D07

34. 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 2 times
• B. Approximately 8 times
• C. Approximately 4 times
• D. Approximately 1.5 times

G1C03

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

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