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. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	A higher duty cycle permits greater power levels to be transmitted
B	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
C	High duty cycle transmitters are exempt from RF exposure requirements
D	A lower duty cycle permits greater power levels to be transmitted

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	All these choices are correct
B	Ensure that all heavy tools are securely fastened to the harness
C	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
D	Always hold on to the tower with one hand

3. - G1A01

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

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

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1000 watts PEP output
B	1500 watts PEP output
C	100 watts PEP output
D	2000 watts PEP output

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

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 relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
B	They must be for other licensed amateurs
C	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
D	They must relate to emergencies or disaster relief

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single phase modulation
B	Single sideband
C	Double sideband
D	Frequency modulation

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	5 Hz to 50 Hz
C	150 Hz to 500 Hz
D	2 kHz to 3 kHz

10. - G2C11

What does the Q signal “QRV” mean?

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

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. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the CW portion of the band
B	Approximately 14.110 MHz to 14.113 MHz
C	Anywhere in the voice portion of the band
D	Approximately 14.074 MHz to 14.077 MHz

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	14 days
B	15 hours to several days
C	28 days
D	4 to 8 minutes

14. - G3B06

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

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

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F1 region
B	The E region
C	The D region
D	The F2 region

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Accidental out-of-band operation can be prevented
B	It may be possible to reduce or eliminate interference from other signals
C	More stations can be accommodated within a given signal passband
D	Interference from impulse noise will be eliminated

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All these choices are correct
B	Receiver
C	Transmitter
D	Antenna and feed line

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	On-and-off humming or clicking
B	Severely distorted audio
C	A chirpy CW signal
D	A CW signal at a nearly pure audio frequency

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

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

20. - G4E09

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

Select	Answer
A	0.5 VDC
B	0.02 VDC
C	0.2 VDC
D	1.38 VDC

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Reactance
C	Reluctance
D	Admittance

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	0.5 watts
B	3200 watts
C	400 watts
D	200 watts

23. - G5C02

What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

Select	Answer
A	Additional resistance must be added in parallel with the secondary to prevent overload
B	Additional resistance must be added in series with the primary to prevent overload
C	The input voltage is multiplied by 4
D	The input voltage is divided by 4

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor’s tolerance value would not be adequate
B	The resistor could overheat
C	The resistor’s internal capacitance would detune the circuit
D	The resistor’s inductance could make circuit performance unpredictable

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	High power handling capability
D	Better suited for RF amplification

26. - G7A10

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

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

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	All these choices are correct
B	Detection
C	Filtering
D	Modulation

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	Amplitude compressed AM
B	Vestigial sideband
C	8-tone frequency shift keying
D	8-bit direct sequence spread spectrum

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	8 kHz
B	5 kHz
C	3 kHz
D	16 kHz

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 5-bit code with additional start and stop bits
B	A 7-bit code with start, stop, and parity bits
C	A code using SELCAL and LISTEN
D	A code using error detection and correction

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	75 ohms
B	50 ohms
C	100 ohms
D	450 ohms

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	Station equipment may carry significant RF current
B	It must be longer than 1 wavelength
C	It produces only vertically polarized radiation
D	It is more effective on the lower HF bands than on the higher bands

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The magnitude of the maximum vertical angle of radiation
B	The direction of maximum radiated field strength from the antenna
C	The point of maximum current in a radiating antenna element
D	The maximum voltage standing wave point on a radiating element

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Wide bandwidth
B	Polarization diversity
C	Harmonic suppression
D	Higher gain per element than a Yagi antenna

Figure G7-1