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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An oscilloscope with a high-stability crystal marker generator
B	An SWR meter with a peak-reading function
C	A calibrated field strength meter with a calibrated antenna
D	A receiver with digital signal processing (DSP) noise reduction

2. - G0B04

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

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

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	60 meters, 30 meters, 17 meters, and 12 meters
B	All HF bands
C	All HF bands except 160 meters and 10 meters
D	80 meters, 40 meters, 20 meters, and 15 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	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
B	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
C	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
D	Only when the foreign country has a formal third-party agreement filed with the FCC

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	50 watts PEP output
B	200 watts PEP output
C	1500 watts PEP output
D	An effective radiated power equivalent to 100 watts from a half-wave dipole

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least two Volunteer Examiners of Technician class or higher
B	At least three Volunteer Examiners of General class or higher
C	At least three Volunteer Examiners of Technician class
D	At least two Volunteer Examiners of General class or higher

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When under automatic control
B	When messages are encrypted
C	When messages are not encrypted
D	Under no circumstances

8. - G2A12

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	Approximately 6 kHz
B	2 kHz to 3 kHz
C	150 Hz to 500 Hz
D	5 Hz to 50 Hz

10. - G2C01

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

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

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international third-party traffic
B	The FCC requires a log of all international contacts
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information about your station

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Find a clear frequency during the same time slot as the calling station
B	Find a clear frequency during the alternate time slot to the calling station
C	Always call on the station’s frequency
D	Call on any frequency in the waterfall except the station’s frequency

13. - G3A05

What is the solar flux index?

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

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Solar radiation and ionospheric disturbances
B	All these choices are correct
C	Time of day and season
D	Path distance and location

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because it is the densest
B	Because it is the highest
C	Because of the Doppler effect
D	Because of temperature inversions

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce power consumption when operating from batteries
B	To reduce excessive audio level on strong signals
C	To reduce the transmitter power when driving a linear amplifier
D	To prevent receiver overload from strong incoming signals

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	The attenuated RF output of the transmitter
C	The local oscillator of the transmitter
D	An external RF oscillator

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Building all equipment in a metal enclosure
B	Placing low-pass filters on all feed lines
C	Bonding all equipment enclosures together
D	Using surge suppressor power outlets

19. - G4D04

What does an S meter measure?

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

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To limit the current flowing from the panel to a safe value
B	To prevent overload by regulating the charging voltage
C	To prevent discharge of the battery through the panel during times of low or no illumination
D	To prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance decreases
B	As the frequency of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance increases
D	As the frequency of the applied AC increases, the reactance decreases

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	24 volts
B	34 volts
C	8.5 volts
D	12 volts

23. - G5C09

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

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

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	0.1 volt
B	0.3 volts
C	1.0 volts
D	0.7 volts

25. - G6B03

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

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

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 4
B	Symbol 11
C	Symbol 5
D	Symbol 1

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class A
B	Class AB
C	Class C
D	Class B

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier noise figure
B	Input amplifier gain
C	All these choices are correct
D	Demodulator stage bandwidth

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase transformation
B	Phase convolution
C	Phase inversion
D	Phase modulation

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Image response
B	Intermediate interference
C	Quadrature response
D	Mixer interference

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is vertical, signal strength is intensity, time is horizontal
C	Frequency is vertical, signal strength is horizontal, time is intensity
D	Frequency is horizontal, signal strength is intensity, time is vertical

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	2:1
B	4:1
C	1:4
D	1:2

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

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Tapered-diameter elements
B	Closer element spacing
C	Loading coils in series with the element
D	Larger-diameter elements

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

Figure G7-1