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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes radiation poisoning
B	It causes the blood count to reach a dangerously low level
C	It heats body tissue
D	It cools body tissue

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	25 amperes
B	20 amperes
C	30 amperes
D	15 amperes

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	7.125 MHz to 7.175 MHz
B	All these choices are correct
C	21.275 MHz to 21.300 MHz
D	28.000 MHz to 28.025 MHz

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 foreign country has a formal third-party agreement filed with the FCC
D	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

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of the date, time, frequency, power level, and stations worked
B	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
C	You must keep a record of all third-party traffic
D	You must keep a record of the manufacturer of your equipment and the antenna used

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Amateur Extra, General, and Technician
B	None, only Amateur Extra class licensees may be accredited
C	General and Technician
D	Technician only

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 4
B	Region 1
C	Region 2
D	Region 3

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “QRZ” several times, followed by your call sign
B	Say “CQ” followed by the call sign of either station
C	Say your call sign once
D	Say “Breaker Breaker”

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
B	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
C	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
D	Listen for 2 minutes before calling CQ

10. - G2C05

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

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

11. - G2D05

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

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

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Cyclic variation in Earth’s radiation belts
B	Long term oscillations in the upper atmosphere
C	Rotation of the Sun’s surface layers around its axis
D	The position of the Moon in its orbit

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24-hour period
B	Lowest Usable Frequency for communications to any point outside a 100-mile radius
C	The Lowest Usable Frequency for communications between two specific points
D	Lowest Usable Frequency during the past 60 minutes

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

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

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced dip
C	No change will be observed
D	A pronounced peak

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Received power that interferes with SWR readings
B	All these choices are correct
C	Desensitization which can cause intermodulation products which interfere with impedance readings
D	Generation of harmonics which interfere with frequency readings

18. - G4C06

What is a possible effect of a resonant ground connection?

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 MHz to 7.181 MHz
B	7.1765 MHz to 7.1795 MHz
C	7.175 MHz to 7.178 MHz
D	7.178 MHz to 7.184 MHz

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Short antennas are more likely to cause distortion of transmitted signals
B	Q of the antenna will be very low
C	Operating bandwidth may be very limited
D	Harmonic radiation may increase

21. - G5A05

How does an inductor react to AC?

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

22. - G5B09

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

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

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	144 to 1
B	3.5 to 1
C	24 to 1
D	12 to 1

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Its reactance increases
B	Catastrophic failure is likely
C	Harmonics are generated
D	It becomes capacitive

25. - G6B03

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

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

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 twice the frequency of the AC input
C	A steady DC voltage
D	A series of DC pulses at the same frequency as the AC input

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	SSB
B	AM
C	All these choices are correct
D	FM

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To present the desired impedance to the transmitter and feed line
B	To minimize radiation resistance
C	To reduce power supply ripple
D	To minimize transmitter power output

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The waveform created by connecting the peak values of the modulated signal
B	The bandwidth of the modulated signal
C	Spurious signals that envelop nearby frequencies
D	The carrier frequency that contains the signal

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Reactance modulator
B	Multiplier
C	Mixer
D	Balanced converter

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Insufficient modulation
B	Overmodulation
C	Long path propagation
D	Backscatter propagation

32. - G9A09

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

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

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 is more effective on the lower HF bands than on the higher bands
D	It produces only vertically polarized radiation

34. - G9C07

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

Select	Answer
A	The power radiated in the major lobe compared to that in the opposite direction
B	The relative position of the driven element with respect to the reflectors and directors
C	The ratio of forward gain to dipole gain
D	The number of directors versus the number of reflectors

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 300 ohms
B	Very low
C	Approximately 50 ohms
D	Very high