Practice Exam

G9C07

1. What does "front-to-back ratio" mean in reference to a Yagi antenna?

• A. The number of directors versus the number of reflectors
• B. The power radiated in the major lobe compared to that in the opposite direction
• C. The ratio of forward gain to dipole gain
• D. The relative position of the driven element with respect to the reflectors and directors

G2A05

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

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

G2E06

3. What is the most common frequency shift for RTTY emissions in the amateur HF bands?

• A. 850 Hz
• B. 425 Hz
• C. 85 Hz
• D. 170 Hz

G7B06

4. What is a shift register?

• A. An analog mixer
• B. A digital mixer
• C. A clocked array of circuits that passes data in steps along the array
• D. An array of operational amplifiers used for tri-state arithmetic operations

G8B05

5. Which intermodulation products are closest to the original signal frequencies?

• A. Odd-order
• B. Second harmonics
• C. Intercept point
• D. Even-order

G9D06

6. Which of the following is an advantage of a log-periodic antenna?

• A. Polarization diversity
• B. Higher gain per element than a Yagi antenna
• C. Harmonic suppression
• D. Wide bandwidth

G4A03

7. How does a noise blanker work?

• A. By redirecting noise pulses into a filter capacitor
• B. By clipping noise peaks
• C. By reducing receiver gain during a noise pulse
• D. By temporarily increasing received bandwidth

G6A05

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

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

G2D03

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

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

G0B13

10. Where should lightning arrestors be located?

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

G3A03

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

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

G9A10

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

• A. 1:2
• B. 2:1
• C. 5:1
• D. 1:5

G9B05

13. How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

• A. If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
• B. If the antenna is too high, the pattern becomes unpredictable
• C. If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
• D. Antenna height has no effect on the pattern

G1A01

14. On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

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

G8C10

15. How does forward error correction (FEC) allow the receiver to correct data errors?

• A. By controlling transmitter output power for optimum signal strength
• B. By using a parity bit with each character
• C. By using the Varicode character set
• D. By transmitting redundant information with the data

G2B11

16. How often may RACES training drills and tests be routinely conducted without special authorization?

• A. No more than 2 hours per week
• B. No more than 2 hours per month
• C. No more than 1 hour per week
• D. No more than 1 hour per month

G5A10

17. Which of the following devices can be used for impedance matching at radio frequencies?

• A. A length of transmission line
• B. A Pi-network
• C. All these choices are correct
• D. A transformer

G4B08

18. What transmitter performance parameter does a two-tone test analyze?

• A. Percentage of suppression of the carrier and undesired sideband for SSB
• B. Percentage of frequency modulation
• C. Linearity
• D. Percentage of carrier phase shift

G5B09

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

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

G4C02

20. Which of the following could be a cause of interference covering a wide range of frequencies?

• A. Using a balun to feed an unbalanced antenna
• B. Not using a balun or line isolator to feed balanced antennas
• C. Lack of rectification of the transmitter's signal in power conductors
• D. Arcing at a poor electrical connection

G5C10

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

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

G1E08

22. What is the maximum PEP output allowed for spread spectrum transmissions?

• A. 100 watts
• B. 10 watts
• C. 1500 watts
• D. 100 milliwatts

G3C10

23. What is near vertical incidence skywave (NVIS) propagation?

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

G4E02

24. What is the purpose of a corona ball on an HF mobile antenna?

• A. To narrow the operating bandwidth of the antenna
• B. To increase the "Q" of the antenna
• C. To reduce RF voltage discharge from the tip of the antenna while transmitting
• D. To reduce the chance of damage if the antenna should strike an object

G6B05

25. What is an advantage of using a ferrite core toroidal inductor?

• A. Most of the magnetic field is contained in the core
• B. The magnetic properties of the core may be optimized for a specific range of frequencies
• C. All these choices are correct
• D. Large values of inductance may be obtained

G1B08

26. 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 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
• C. Only when the foreign country has a formal third-party agreement filed with the FCC
• 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

G2C10

27. What does the Q signal "QRN" mean?

• A. Stop sending
• B. Zero beat my signal
• C. Send more slowly
• D. I am troubled by static

G8A04

28. What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

• A. Pulse modulation
• B. Multiplex modulation
• C. Amplitude modulation
• D. Phase modulation

G4D01

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

• A. Increase the apparent loudness of transmitted 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. Prevent distortion of voice signals

G0A05

30. What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

• A. Take action to prevent human exposure to the excessive RF fields
• B. File an Environmental Impact Statement (EIS-97) with the FCC
• C. Secure written permission from your neighbors to operate above the controlled MPE limits
• D. All these choices are correct

G1D04

31. Who must observe the administration of a Technician class license examination?

• A. At least three Volunteer Examiners of Technician class
• B. At least three Volunteer Examiners of General class or higher
• C. At least two Volunteer Examiners of General class or higher
• D. At least two Volunteer Examiners of Technician class or higher

G1C01

32. What is the maximum transmitter power an amateur station may use on 10.140 MHz?

• A. 1500 watts PEP output
• B. 2000 watts PEP output
• C. 1000 watts PEP output
• D. 200 watts PEP output

G3B06

33. What usually happens to radio waves with frequencies below the LUF?

• A. They pass through the ionosphere
• B. They are refracted and trapped in the ionosphere to circle Earth
• C. They are attenuated before reaching the destination
• D. They are refracted back to Earth

G7C14

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

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

G7A09

35. Which symbol in figure G7-1 represents a field effect transistor?

• A. Symbol 4
• B. Symbol 1
• C. Symbol 2
• D. Symbol 5