Practice Exam

G3A12

1. What does the K-index measure?

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

G9B04

2. What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

• A. It is a figure-eight off both ends of the antenna
• B. It is a circle (equal radiation in all directions)
• C. It is a figure-eight at right angles to the antenna
• D. It has a pair of lobes on one side of the antenna and a single lobe on the other side

G3B04

3. Which of the following is a way to determine current propagation on a desired band from your station?

• A. Send a series of dots and listen for echoes
• B. Use a network of automated receiving stations on the internet to see where your transmissions are being received
• C. Check the A-index
• D. All these choices are correct

G4E09

4. What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

• A. 1.38 VDC
• B. 0.5 VDC
• C. 0.02 VDC
• D. 0.2 VDC

G3C04

5. What does the term "critical angle" mean, as applied to radio wave propagation?

• A. The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
• B. The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
• C. The long path azimuth of a distant station
• D. The short path azimuth of a distant station

G9A03

6. What is the nominal characteristic impedance of "window line" transmission line?

• A. 75 ohms
• B. 450 ohms
• C. 50 ohms
• D. 100 ohms

G9C03

7. How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

• A. They are all the same length
• B. The reflector is longer, and the director is shorter
• C. The reflector is shorter, and the director is longer
• D. Relative length depends on the frequency of operation

G6A05

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

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

G1E07

9. In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

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

G0B06

10. Which of the following is covered by the National Electrical Code?

• A. RF exposure limits of the human body
• B. Acceptable modulation limits
• C. Electrical safety of the station
• D. Acceptable bandwidth limits

G2C01

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

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

G8B05

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

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

G7A01

13. What is the function of a power supply bleeder resistor?

• A. It removes shock hazards from the induction coils
• B. It eliminates ground loop current
• C. It discharges the filter capacitors when power is removed
• D. It acts as a fuse for excess voltage

G5B07

14. What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

• A. The reciprocal of the RMS value
• B. The RMS value
• C. The peak value
• D. The peak-to-peak value

G2A12

15. What control is typically adjusted for proper ALC setting on a single sideband transceiver?

• A. Attenuator level
• B. RF clipping level
• C. Transmit audio or microphone gain
• D. Antenna inductance or capacitance

G1B05

16. Which of the following one-way transmissions are permitted?

• A. All these choices are correct
• B. Unidentified test transmissions of less than 10 seconds in duration
• C. Regular transmissions offering equipment for sale, if intended for amateur radio use
• D. Transmissions to assist with learning the International Morse code

G6B07

17. Which of the following describes a type N connector?

• A. A nickel plated version of the PL-259
• B. A moisture-resistant RF connector useful to 10 GHz
• C. A low noise figure VHF connector
• D. A small bayonet connector used for data circuits

G2B04

18. 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

G4C10

19. What could be a symptom caused by a ground loop in your station's audio connections?

• A. You receive reports of "hum" on your station's transmitted signal
• B. An item of station equipment starts to draw excessive amounts of current
• C. The SWR reading for one or more antennas is suddenly very high
• D. You receive reports of harmonic interference from your station

G4D01

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

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

G9D11

21. Which of the following is a disadvantage of multiband antennas?

• A. They have poor harmonic rejection
• B. They must be used with an antenna tuner
• C. They must be fed with open wire line
• D. They present low impedance on all design frequencies

G7B10

22. Which of the following describes a linear amplifier?

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

G8C10

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

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

G4B09

24. When is an analog multimeter preferred to a digital multimeter?

• A. When high precision is desired
• B. When measuring the frequency of an oscillator
• C. When testing logic circuits
• D. When adjusting circuits for maximum or minimum values

G0A04

25. What does "time averaging" mean when evaluating RF radiation exposure?

• A. The total time of the exposure
• B. The average amount of power developed by the transmitter over a specific 24-hour period
• C. The total RF exposure averaged over a certain period
• D. The average time it takes RF radiation to have any long-term effect on the body

G7C10

26. What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

• A. All types of modulation can be created with appropriate processing
• B. The need for high resolution analog-to-digital converters is eliminated
• C. Automatic conversion of the signal from digital to analog
• D. Minimum detectible signal level is reduced

G1D07

27. Volunteer Examiners are accredited by what organization?

• A. A Volunteer Examiner Coordinator
• B. The Federal Communications Commission
• C. The Wireless Telecommunications Bureau
• D. The Universal Licensing System

G2D05

28. Which of the following indicates that you are looking for an HF contact with any station?

• A. Repeat "CQ" a few times, followed by "this is," then your call sign a few times, then pause to listen, repeat as necessary
• B. Say "QTC" followed by "this is" and your call sign -- if no answer, change frequency and repeat
• C. Transmit an unmodulated carried for approximately 10 seconds, followed by "this is" and your call sign, and pause to listen -- repeat as necessary
• D. Sign your call sign once, followed by the words "listening for a call" -- if no answer, change frequency and repeat

G5C13

29. Which of the following components should be added to a capacitor to increase the capacitance?

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

G4A01

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

• A. To restrict the transmitter voice bandwidth
• B. To remove interfering splatter generated by signals on adjacent frequencies
• C. To reduce interference from carriers in the receiver passband
• D. To eliminate receiver interference from impulse noise sources

G8A14

31. What is link margin?

• A. Transmit power minus receiver sensitivity
• B. The difference between received power level and minimum required signal level at the input to the receiver
• C. Receiver sensitivity plus 3 dB
• D. The opposite of fade margin

G1A01

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

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

G2E05

33. What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

• A. DSB
• B. LSB
• C. USB
• D. SSB

G5A12

34. What occurs in an LC circuit at resonance?

• A. Current and voltage are equal
• B. Inductive reactance and capacitive reactance cancel
• C. Resistance is cancelled
• D. The circuit radiates all its energy in the form of radio waves

G1C06

35. What is the limit for transmitter power on the 1.8 MHz band?

• A. 200 watts PEP output
• B. 1200 watts PEP output
• C. 1500 watts PEP output
• D. 1000 watts PEP output