US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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1. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	Its power density
C	All these choices are correct
D	Its frequency

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	Next to the closest power pole
B	As close to the station equipment as possible
C	Parallel to the water supply line
D	Outside the building

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.000 MHz to 28.025 MHz only
B	28.025 MHz to 28.300 MHz only
C	28.000 MHz to 28.300 MHz only
D	The entire band

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	28.20 MHz to 28.30 MHz
B	21.08 MHz to 21.09 MHz
C	On any frequency if transmissions are in Morse code
D	On any frequency if power is less than 1 watt

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	56 kilobaud
C	19.6 kilobaud
D	300 baud

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A license from the foreign country and a special remote station permit from the FCC
B	A US operator/primary station license
C	Only an appropriate US operator/primary license and a special remote station permit from the FCC
D	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

7. - G1E07

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

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

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “CQ” followed by the call sign of either station
B	Say your call sign once
C	Say “QRZ” several times, followed by your call sign
D	Say “Breaker Breaker”

9. - G2B04

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

Select	Answer
A	1 kHz to 3 kHz
B	3 kHz to 6 kHz
C	150 Hz to 500 Hz
D	5 Hz to 50 Hz

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Submit a log to the contest sponsor
B	Send a QSL card to the stations worked, or QSL via Logbook of The World
C	Identify your station according to normal FCC regulations
D	All these choices are correct

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Long pauses in message transmission
B	All these choices are correct
C	Frequent retries or timeouts
D	Failure to establish a connection between stations

13. - G3A13

What does the A-index measure?

Select	Answer
A	The amount of polarization of the Sun’s electric field
B	The solar radio flux at Boulder, Colorado
C	The relative position of sunspots on the surface of the Sun
D	The long-term stability of Earth’s geomagnetic field

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	HF communications over the path are enhanced
C	Propagation via ordinary skywave communications is not possible over that path
D	Double-hop propagation along the path is more common

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Scatter propagation occurs only at night
B	There are very large, sudden swings in signal strength
C	Phone signals have high intelligibility
D	Signals have a fluttering sound

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To prevent excessive drive
C	To balance the transmitter audio frequency response
D	To reduce harmonic radiation

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The transmitter balanced mixer output
B	An external RF oscillator
C	The local oscillator of the transmitter
D	The attenuated RF output of the transmitter

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Connect all ground conductors in series
B	Bond equipment enclosures together
C	Connect the AC neutral conductor to the ground wire
D	Avoid using lock washers and star washers when making ground connections

19. - G4D04

What does an S meter measure?

Select	Answer
A	Transmitter power output
B	Carrier suppression
C	Received signal strength
D	Impedance

20. - G4E01

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

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

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	X
B	Y
C	Z
D	B

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	20.6 percent
B	10.9 percent
C	12.2 percent
D	25.9 percent

23. - G5C14

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

Select	Answer
A	A capacitor in parallel
B	A capacitor in series
C	An inductor in series
D	An inductor in parallel

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Control grid
C	Suppressor grid
D	Screen grid

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Better suited for RF amplification
C	Better suited for power supply regulation
D	Low power consumption

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Faster switching time makes higher output voltage possible
B	High-frequency operation allows the use of smaller components
C	Fewer circuit components are required
D	Inherently more stable

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The inductance and capacitance in the tank circuit
B	The number of stages in the divider
C	The number of stages in the counter
D	The time delay of the lag circuit

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	90 degrees
B	Zero
C	180 degrees
D	45 degrees

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Single sideband
C	Frequency modulation
D	Vestigial sideband

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To allow time for the other station to break in during a transmission
B	To prevent overmodulation
C	Some modes have high duty cycles that could exceed the transmitter’s average power rating
D	To aid in tuning your transmitter

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Viterbi
B	Volumetric
C	Varicode
D	Binary

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation is independent of frequency
B	Attenuation increases
C	Attenuation follows Marconi’s Law of Attenuation
D	Attenuation decreases

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Omnidirectional in azimuth
B	Isotropic
C	Bi-directional in azimuth
D	Hemispherical

34. - G9C02

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

Select	Answer
A	1/2 wavelength
B	1/4 wavelength
C	3/4 wavelength
D	1 wavelength

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

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