Practice Exam

G5A08

1. Why is impedance matching important?

• A. So the load will draw minimum power from the source
• B. To ensure that the resistance and reactance in the circuit are equal
• C. To ensure that there is less resistance than reactance in the circuit
• D. So the source can deliver maximum power to the load

G6B12

2. What is the primary purpose of a screen grid in a vacuum tube?

• A. To increase the control grid resistance
• B. To increase efficiency
• C. To decrease plate resistance
• D. To reduce grid-to-plate capacitance

G4D08

3. What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

• A. 7.175 to 7.178 MHz
• B. 7.1765 to 7.1795 MHz
• C. 7.178 to 7.181 MHz
• D. 7.178 to 7.184 MHz

G4C03

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

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

G5C14

5. Which of the following components should be added to an inductor to increase the inductance?

• A. A capacitor in series
• B. A resistor in parallel
• C. An inductor in series
• D. An inductor in parallel

G9D09

6. Which of the following is an application for a Beverage antenna?

• A. Portable direction finding at lower HF frequencies
• B. Directional transmitting for low HF bands
• C. Portable direction finding at higher HF frequencies
• D. Directional receiving for low HF bands

G8A03

7. What is the name of the process which changes the frequency of an RF wave to convey information?

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

G3A02

8. What effect does a Sudden Ionospheric Disturbance have on the daytime ionospheric propagation of HF radio waves?

• A. It disrupts communications via satellite more than direct communications
• B. None, because only areas on the night side of the Earth are affected
• C. It disrupts signals on lower frequencies more than those on higher frequencies
• D. It enhances propagation on all HF frequencies

G3C06

9. What is a characteristic of HF scatter signals?

• A. They have a wavering sound
• B. They have very large swings in signal strength
• C. All of these choices are correct
• D. They have high intelligibility

G6C13

10. Which of these connector types is commonly used for RF service at frequencies up to 150 MHz?

• A. Octal
• B. RJ-11
• C. PL-259
• D. DB-25

G7A03

11. What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

• A. Double the normal peak output voltage of the power supply
• B. Equal to the normal peak output voltage of the power supply
• C. One-quarter the normal output voltage of the power supply
• D. Half the normal output voltage of the power supply

G1B02

12. With which of the following conditions must beacon stations comply?

• A. The frequency must be coordinated with the National Beacon Organization
• B. There must be no more than one beacon signal in the same band from a single location
• C. The frequency must be posted on the Internet or published in a national periodical
• D. A beacon station may not use automatic control

G4B10

13. Which of the following can be determined with a directional wattmeter?

• A. Standing wave ratio
• B. RF interference
• C. Antenna front-to-back ratio
• D. Radio wave propagation

G0A13

14. What precaution should be taken when installing a ground-mounted antenna?

• A. It should not be installed higher than you can reach
• B. It should be installed so no one can be exposed to RF radiation in excess of maximum permissible limits
• C. It should not be installed in a wet area
• D. It should limited to 10 feet in height

G1A12

15. When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

• A. The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
• B. The lower frequency end
• C. The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz
• D. The upper frequency end

G9B11

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

• A. 131 feet
• B. 42 feet
• C. 263 feet
• D. 84 feet

G7B14

17. 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

G7C06

18. What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

• A. Substantially lower
• B. Twice the transmission line impedance
• C. Substantially higher
• D. About the same

G2D02

19. Which of the following are objectives of the Amateur Auxiliary?

• A. To provide emergency and public safety communications
• B. To conduct efficient and orderly amateur licensing examinations
• C. To coordinate repeaters for efficient and orderly spectrum usage
• D. To encourage amateur self regulation and compliance with the rules

G2A06

20. Which of the following is an advantage when using single sideband as compared to other analog voice modes on the HF amateur bands?

• A. Less subject to static crashes (atmospherics)
• B. Ease of tuning on receive and immunity to impulse noise
• C. Less bandwidth used and higher power efficiency
• D. Very high fidelity voice modulation

G9A04

21. What is the reason for the occurrence of reflected power at the point where a feed line connects to an antenna?

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

G5B10

22. What percentage of power loss would result from a transmission line loss of 1 dB?

• A. 12.2%
• B. 10.9%
• C. 20.5%
• D. 25.9%

G0B16

23. When might a lead acid storage battery give off explosive hydrogen gas?

• A. When not placed on a level surface
• B. When stored for long periods of time
• C. When being discharged
• D. When being charged

G1E08

24. Which of the following is a requirement for a non-licensed person to communicate with a foreign Amateur Radio station from a station with an FCC granted license at which a licensed control operator is present?

• A. Information must be exchanged in English
• B. The foreign amateur station must be in a country with which the United States has a third party agreement
• C. All of these choices are correct
• D. The control operator must have at least a General Class license

G6A02

25. Which of the following types of capacitors are often used in power supply circuits to filter the rectified AC?

• A. Electrolytic
• B. Disc ceramic
• C. Mica
• D. Vacuum variable

G2B04

26. When selecting a CW transmitting frequency, what minimum frequency separation should you allow in order to minimize interference to stations on adjacent frequencies?

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

G2E05

27. Which of the following describes Baudot code?

• A. A 5-bit code, with additional start and stop bits
• B. A code using error detection and correction
• C. A 7-bit code, with start, stop and parity bits
• D. A code using SELCAL and LISTEN

G4E03

28. Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

• A. To the alternator or generator using heavy gauge wire
• B. To the battery using resistor wire
• C. To the alternator or generator using resistor wire
• D. To the battery using heavy gauge wire

G8B11

29. How does forward error correction allow the receiver to correct errors in received data packets?

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

G3B05

30. What usually happens to radio waves with frequencies below the Maximum Usable Frequency (MUF) and above the Lowest Usable Frequency (LUF) when they are sent into the ionosphere?

• A. They are bent and trapped in the ionosphere to circle the Earth
• B. They are bent back to the Earth
• C. They are amplified by interaction with the ionosphere
• D. They pass through the ionosphere

G1D02

31. What license examinations may you administer when you are an accredited VE holding a General Class operator license?

• A. General and Technician
• B. General only
• C. Technician only
• D. Extra, General and Technician

G9C06

32. Which of the following is a reason why a Yagi antenna is often used for radio communications on the 20 meter band?

• A. It is smaller, less expensive and easier to erect than a dipole or vertical antenna
• B. It provides the highest possible angle of radiation for the HF bands
• C. It helps reduce interference from other stations to the side or behind the antenna
• D. It provides excellent omnidirectional coverage in the horizontal plane

G4A01

33. What is the purpose of the "notch filter" found on many HF transceivers?

• A. To enhance the reception of a specific frequency on a crowded band
• B. To restrict the transmitter voice bandwidth
• C. To reduce interference from carriers in the receiver passband
• D. To eliminate receiver interference from impulse noise sources

G1C09

34. What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25 meter and 70 centimeter bands

• A. 1200 baud
• B. 19.6 kilobaud
• C. 300 baud
• D. 56 kilobaud

G2C04

35. What does it mean when a CW operator sends "CL" at the end of a transmission?

• A. Listening only for a specific station or stations
• B. Operating full break-in
• C. Closing station
• D. Keep frequency clear