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. - G0A05

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?

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

2. - G0B04

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

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

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	30 meters
B	20 meters
C	160 meters
D	12 meters

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
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 foreign country has a formal third-party agreement filed with the FCC
C	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
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

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the remote station’s country
B	Only those of the FCC
C	Those of both the remote station’s country and the FCC
D	Those of the remote station’s country and the FCC’s third-party regulations

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Only in the non-phone Extra Class segments of the bands
B	On any band segment where digital operation is permitted
C	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands
D	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband
B	Upper sideband
C	Double sideband
D	Suppressed sideband

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Decrease power and continue to transmit
B	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
C	Switch to the opposite sideband
D	Advise the interfering stations that you are on the frequency and that you have priority

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	KN
B	SK
C	BK
D	AR

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Alpha, Bravo, Charlie, Delta
B	Able, Baker, Charlie, Dog
C	America, Boston, Canada, Denmark
D	Adam, Boy, Charles, David

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide high-speed data services during an emergency or community event
B	To provide real time propagation data by monitoring amateur radio transmissions worldwide
C	To provide FM repeater coverage in remote areas
D	To provide DX spotting reports to aid contesters and DXers

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	Only at the maximum point
B	At the summer solstice
C	At any point
D	Only at the minimum point

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	Propagation via ordinary skywave communications is not possible over that path
C	Double-hop propagation along the path is more common
D	HF communications over the path are enhanced

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The E region is not present
B	Ground waves are absorbing much of the signal
C	Energy is scattered into the skip zone through several different paths
D	The ionospheric region involved is unstable

16. - G4A03

How does a noise blanker work?

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

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the frequency response
B	It improves the resolution of the readings
C	It decreases the loading on circuits being measured
D	It allows for higher voltages to be safely measured

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

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

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Excess intermodulation products
B	Excessive background noise
C	Distorted speech
D	All these choices are correct

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 reduce radiation resistance
C	To increase the power handling capacity of a whip antenna
D	To lower the radiation angle

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Siemens
C	Farad
D	Ampere

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	2.00
B	0.707
C	1.414
D	1.00

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	14.3 millihenries
B	70 millihenries
C	1,000 millihenries
D	7 millihenries

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	High capacitance for given volume
B	High stability
C	Tight tolerance
D	Comparatively low cost

25. - G6B11

What is an SMA connector?

Select	Answer
A	A connector designed for serial multiple access signals
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 type-S to type-M adaptor

26. - G7A08

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

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

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
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

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in test gear to detect spurious mixing products
B	Used in an FM receiver to filter out unwanted sidebands
C	Used in transmitter to perform frequency multiplication
D	Used in a single sideband receiver to extract the modulated signal

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Intermodulation
B	Heterodyning
C	Rolloff
D	Detection

31. - G8C12

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

Select	Answer
A	Binary
B	Varicode
C	Volumetric
D	Viterbi

32. - G9A04

What causes reflected power at an antenna’s feed point?

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

33. - G9B11

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

Select	Answer
A	42 feet
B	132 feet
C	84 feet
D	263 feet

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The relative position of the driven element with respect to the reflectors and directors
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 number of directors versus the number of reflectors

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	Broadside to the plane of the halo
B	On the same side as the feed point
C	Opposite the feed point
D	Omnidirectional in the plane of the halo