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

2. - G0B07

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

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

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	30 meters
C	60 meters
D	12 meters

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

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

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	2.8 kHz
B	5.6 kHz
C	1.8 kHz
D	3 kHz

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party’s amateur license has been revoked and not reinstated
B	The third party is speaking in a language other than English
C	All these choices are correct
D	The third party is not a US citizen

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	Suppressed sideband
C	Double sideband
D	Upper sideband

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

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	No US stations should call
B	Listening only for a specific station or stations
C	Operating full break-in
D	Closing station now

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. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	A special hardware modem
B	Receiver attenuator set to -12 dB
C	A vertically polarized antenna
D	Computer time accurate to within approximately 1 second

13. - G3A12

What does the K-index measure?

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

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just below the MUF
B	Just above the LUF
C	Just above the critical frequency
D	Just below the critical frequency

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Propagation near the MUF
B	Short distance MF or HF propagation at high elevation angles
C	Long path HF propagation at sunrise and sunset
D	Double hop propagation near the LUF

16. - G4A03

How does a noise blanker work?

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

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Higher precision
B	Less prone to overload
C	Better for measuring computer circuits
D	Faster response

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	Overheating of ground straps
C	A ground loop
D	Corrosion of the ground rod

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Increase the apparent loudness of transmitted voice signals
B	Decrease high-frequency voice output to prevent out-of-band operation
C	Prevent distortion of voice signals
D	Increase transmitter bass response for more natural-sounding SSB signals

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	“Picket fencing”
B	The wire gauge of the DC power line to the transceiver
C	Efficiency of the electrically short antenna
D	FCC rules limiting mobile output power on the 75-meter band

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

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	1.4 watts
B	100 watts
C	400 watts
D	353.5 watts

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To prevent parasitic oscillations due to resistive losses in the primary
B	To accommodate the higher current of the primary
C	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
D	To improve the coupling between the primary and secondary

24. - G6A06

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

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

25. - G6B11

What is an SMA connector?

Select	Answer
A	A type of push-on connector intended for high-voltage applications
B	A type-S to type-M adaptor
C	A connector designed for serial multiple access signals
D	A small threaded connector suitable for signals up to several GHz

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 11
C	Symbol 1
D	Symbol 7

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input power
B	Add the RF input power to the DC output power
C	Multiply the RF input power by the reciprocal of the RF output power
D	Divide the DC input power by the DC output power

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	45 degrees
D	180 degrees

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	Signal distortion caused by excessive drive or speech levels
B	The transmitter’s automatic level control (ALC) is properly adjusted
C	The transmitter’s carrier is properly suppressed
D	Signal distortion caused by insufficient collector current

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Image frequency
B	Beat frequency oscillator
C	RF input
D	Local oscillator

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	2.4 GHz
B	902 MHz
C	432 MHz
D	10.7 GHz

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	5:1
B	Between 1:1 and 5:1 depending on the characteristic impedance of the line
C	1:1
D	Between 1:1 and 5:1 depending on the reflected power at the transmitter

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower feed point impedance
B	Lower ground losses
C	Lower radiation resistance
D	Shorter radials

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	The reflector is shorter, and the director is longer
B	They are all the same length
C	Relative length depends on the frequency of operation
D	The reflector is longer, and the director is shorter

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To prevent out-of-band operation
C	To enable multiband operation
D	To provide balanced feed point impedance

Figure G7-1