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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Make sure the antenna is properly shielded
B	Locate the antenna close to your operating position to minimize feed-line radiation
C	Position the antenna along the edge of a wall to reduce parasitic radiation
D	Make sure that MPE limits are not exceeded in occupied areas

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Unground the base of the tower
B	Make sure all circuits that supply power to the tower are locked out and tagged
C	Notify the electric company that a person will be working on the tower
D	All these choices are correct

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	11 meters
B	60 meters
C	30 meters
D	12 meters

4. - G1B05

Which of the following one-way transmissions are permitted?

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

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	1500 watts PEP
B	ERP of 100 watts PEP with respect to an isotropic antenna
C	10 watts RMS
D	ERP of 100 watts PEP with respect to a dipole

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
B	The person must be a resident of the US for a minimum of 5 years
C	The person’s home citizenship must be in ITU region 2
D	The person must hold an FCC granted amateur radio license of General class or above

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must be for other licensed amateurs
B	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log
C	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
D	They must relate to emergencies or disaster relief

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Only contest stations
B	Any stations outside the lower 48 states
C	Only stations in Germany
D	Any caller is welcome to respond

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Any control operator when normal communication systems are operational
B	Only a person holding an FCC-issued amateur operator license
C	A person holding an FCC-issued amateur operator license or an appropriate government official
D	Only a RACES net control operator

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The fastest speed at which you are comfortable copying, but no slower than the CQ
B	The fastest speed at which you are comfortable copying, but no faster than the CQ
C	At the standard calling speed of 5 wpm
D	At the standard calling speed of 10 wpm

11. - G2D05

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

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

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send QRL in Morse code
B	Send an email to the system control operator
C	Transmit a connect message on the station’s published frequency
D	Respond when the station broadcasts its SSID

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of solar radiation with a wavelength of 10.7 centimeters
B	Another name for the American sunspot number
C	A count of sunspots that is adjusted for solar emissions
D	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are attenuated before reaching the destination
B	They pass through the ionosphere
C	They are refracted and trapped in the ionosphere to circle Earth
D	They are refracted back to Earth

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

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

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To permit full duplex operation -- that is, transmitting and receiving at the same time
B	To improve frequency accuracy by allowing variable frequency output (VFO) operation
C	To allow transmitting on two frequencies at once
D	To transmit on one frequency and listen on another

17. - G4B10

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

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

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents signal overload
B	It prevents a blown fuse in the event of an internal short circuit
C	It ensures that hazardous voltages cannot appear on the chassis
D	It ensures that the neutral wire is grounded

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.344 MHz to 14.347 MHz
B	14.347 MHz to 14.647 MHz
C	14.3455 MHz to 14.3485 MHz
D	14.347 MHz to 14.350 MHz

20. - G4E01

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

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

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Impedance is equal to the arithmetic mean of the inductance and capacitance
B	Resonance causes impedance to be very high
C	Impedance is equal to the geometric mean of the inductance and capacitance
D	Resonance causes impedance to be very low

22. - G5B04

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

Select	Answer
A	6 watts
B	2.4 watts
C	24 watts
D	60 watts

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	0.33 microfarads
B	33.3 microfarads
C	3.0 microfarads
D	300 microfarads

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	8.5 volts
B	10.5 volts
C	6 volts
D	12 volts

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	Type N
B	RCA Phono
C	BNC
D	PL-259

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A sine wave at half the frequency of the AC input
B	A series of DC pulses at the same frequency as the AC input
C	A steady DC voltage
D	A series of DC pulses at twice the frequency of the AC input

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	An amplifier and a divider
B	A circulator and a filter operating in a feed-forward loop
C	A frequency multiplier and a mixer
D	A filter and an amplifier operating in a feedback loop

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Image and harmonic
B	Pole and zero
C	Cutoff and rolloff
D	Upper and lower half-power

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using quasi-parallel to serial conversion to reduce bandwidth
B	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
C	Modulation using quadra-pole sideband keying to generate spread spectrum signals
D	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Higher symbol rates require wider bandwidth
B	Bandwidth is half the symbol rate
C	Lower symbol rates require wider bandwidth
D	Symbol rate and bandwidth are not related

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	Packets will be routed incorrectly
B	Encoding reverts to the default character set
C	The connection is dropped
D	The checksum overflows

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The distance between the centers of the conductors and the radius of the conductors
C	The frequency of the signal and the length of the line
D	The radius of the conductors and the frequency of the signal

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It is unaffected by the height above ground
B	It steadily increases
C	It steadily decreases
D	It peaks at about 1/8 wavelength above ground

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	All these choices are correct
B	It does not require the driven element to be insulated from the boom
C	It is useful for matching multiband antennas
D	It does not require any inductors or capacitors

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
B	A horizontal dipole placed at approximately 1/2 wavelength above the ground
C	A vertical dipole placed at approximately 1/2 wavelength above the ground
D	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground