Practice Exam

G4A15

1. Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?

• A. The VOX circuit does not un-key the transmitter
• B. The transmitter signal is distorted
• C. All these choices are correct
• D. Frequent connection timeouts

G1D10

2. What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

• A. 21 years
• B. There is no age limit
• C. 18 years
• D. 12 years

G1C01

3. What is the maximum transmitting power an amateur station may use on 10.140 MHz?

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

G9C02

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

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

G6A09

5. Which of the following describes the construction of a MOSFET?

• A. The gate is formed by a back-biased junction
• B. The source is formed by depositing metal on silicon
• C. The source is separated from the drain by a thin insulating layer
• D. The gate is separated from the channel with a thin insulating layer

G0A01

6. What is one way that RF energy can affect human body tissue?

• A. It cools body tissue
• B. It heats body tissue
• C. It causes the blood count to reach a dangerously low level
• D. It causes radiation poisoning

G9D05

7. What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

• A. It allows quick selection of vertical or horizontal polarization
• B. It narrows the main lobe in elevation
• C. It narrows the main lobe in azimuth
• D. It allows simultaneous vertical and horizontal polarization

G2D11

8. Which of the following is typical of the lower HF frequencies during the summer?

• A. Heavy distortion on signals due to photon absorption
• B. Poor propagation at any time of day
• C. World-wide propagation during the daylight hours
• D. High levels of atmospheric noise or "static"

G7A04

9. What is an advantage of a half-wave rectifier in a power supply?

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

G5A08

10. What is one reason to use an impedance matching transformer?

• A. To minimize transmitter power output
• B. To reduce power supply ripple
• C. To maximize the transfer of power
• D. To minimize radiation resistance

G3B08

11. What does MUF stand for?

• A. The Maximum Usable Frequency for communications between two points
• B. The Minimum Usable Frequency during a 24-hour period
• C. The Minimum Usable Frequency for communications between two points
• D. The Maximum Usable Frequency during a 24-hour period

G9B11

12. What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

• A. 132 feet
• B. 42 feet
• C. 263 feet
• D. 84 feet

G8C01

13. On what band do amateurs share channels with the unlicensed Wi-Fi service?

• A. 2.4 GHz
• B. 10.7 GHz
• C. 432 MHz
• D. 902 MHz

G2E11

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

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

G4D11

15. How close to the upper edge of the phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

• A. At least 1 kHz below the edge of the segment
• B. At least 1 kHz above the edge of the segment
• C. At least 3 kHz above the edge of the band
• D. At least 3 kHz below the edge of the band

G3C10

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

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

G4B09

17. Which of the following can be determined with a field strength meter?

• A. The presence and amount of phase distortion of a transmitter
• B. The presence and amount of amplitude distortion of a transmitter
• C. The radiation resistance of an antenna
• D. The radiation pattern of an antenna

G4C03

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

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

G5B04

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

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

G7B10

20. Which of the following describes a linear amplifier?

• A. Any RF power amplifier used in conjunction with an amateur transceiver
• B. An amplifier used as a frequency multiplier
• C. A Class C high efficiency amplifier
• D. An amplifier in which the output preserves the input waveform

G8A05

21. What type of modulation varies the instantaneous power level of the RF signal?

• A. Frequency modulation
• B. Phase modulation
• C. Amplitude modulation
• D. Frequency shift keying

G5C12

22. What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

• A. 14.3 microfarads
• B. 0.07 microfarads
• C. 70 microfarads
• D. 1000 microfarads

G8B11

23. What combination of a mixer's Local Oscillator (LO) and RF input frequencies is found in the output?

• A. The average
• B. The arithmetic product
• C. The ratio
• D. The sum and difference

G0B04

24. Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

• A. Lack of oxygen for adequate combustion
• B. Danger of engine over torque
• C. Danger of carbon monoxide poisoning
• D. Lack of nitrogen for adequate combustion

G2B03

25. What is good amateur practice if propagation changes during a contact and you notice interference from other stations on the frequency?

• A. Report the interference to your local Amateur Auxiliary Coordinator
• B. Tell the interfering stations to change frequency
• C. Increase power to overcome interference
• D. Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

G1A10

26. Which of the following frequencies is available to a control operator holding a General class license?

• A. All these choices are correct
• B. 28.550 MHz
• C. 28.020 MHz
• D. 28.350 MHz

G2A10

27. Which of the following statements is true of voice VOX operation versus PTT operation?

• A. It occupies less bandwidth
• B. It allows "hands free" operation
• C. It provides more power output
• D. The received signal is more natural sounding

G6B11

28. What is a type SMA connector?

• A. A large bayonet connector usable at power levels more than 1 KW
• B. A type of push-on connector intended for high-voltage applications
• C. A small threaded connector suitable for signals up to several GHz
• D. A connector designed for serial multiple access signals

G7C08

29. What circuit is used in analog FM receivers to convert IF output signals to audio?

• A. Mixer
• B. Product detector
• C. Discriminator
• D. Phase inverter

G9A04

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

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

G3A12

31. What does the K-index indicate?

• A. The short-term stability of Earth's magnetic field
• B. The solar radio flux at Boulder, Colorado
• C. The stability of the sun's magnetic field
• D. The relative position of sunspots on the surface of the sun

G1B01

32. What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

• A. 50 feet
• B. 100 feet
• C. 300 feet
• D. 200 feet

G4E07

33. Which of the following may cause receive interference in a radio installed in a vehicle?

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

G1E07

34. In what part of the 13-centimeter band may an amateur station communicate with non-licensed Wi-Fi stations?

• A. Channels 42 through 45
• B. Anywhere in the band
• C. Channels 1 through 4
• D. No part

G2C11

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

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