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

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	High voltages can cause lead-tin solder to disintegrate suddenly
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	Tin in the solder can “cold flow,” causing shorts in the circuit
D	RF energy can convert the lead into a poisonous gas

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations may use the band only during emergencies
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Occasional retransmission of weather and propagation forecast information from US government stations
B	Encrypted messages, if not intended to facilitate a criminal act
C	Unidentified transmissions of less than 10 seconds duration for test purposes only
D	Automatic retransmission of other amateur signals by any amateur station

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	200 watts PEP output
D	2000 watts PEP output

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	General and Technician
C	None, only Amateur Extra class licensees may be accredited
D	Technician only

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	Channels 1 through 4
B	Anywhere in the band
C	No part
D	Channels 42 through 45

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

Select	Answer
A	Double sideband
B	Lower sideband
C	Suppressed sideband
D	Upper sideband

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only digital contacts
B	Only contacts with other stations within the 48 contiguous states
C	Only contacts with stations not within the 48 contiguous states
D	Only SSTV contacts

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	The fastest speed at which you are comfortable copying, but no faster than the CQ
D	At the standard calling speed of 5 wpm

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To encourage amateur radio operators to self-regulate and comply with the rules
B	To conduct efficient and orderly amateur licensing examinations
C	To coordinate repeaters for efficient and orderly spectrum usage
D	To provide emergency and public safety communications

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	DSB
B	LSB
C	USB
D	CW

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	A zero sunspot number indicates that radio propagation is not possible on any band
B	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
C	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
D	A zero sunspot number indicates undisturbed conditions

14. - G3B02

What factors affect the MUF?

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

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The F region absorbs signals at these frequencies during daylight hours
B	The E region is unstable during daylight hours
C	The D region absorbs signals at these frequencies during daylight hours
D	The F region is unstable during daylight hours

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 the transmitter power when driving a linear amplifier
C	To reduce excessive audio level on strong signals
D	To prevent receiver overload from strong incoming signals

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Front-to-back ratio of an antenna
B	Gain of a directional antenna
C	Impedance of coaxial cable
D	Power output from a transmitter

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	Solder flux will prevent a low conductivity connection
C	All these choices are correct
D	Solder has too high a dielectric constant to provide adequate lightning protection

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	At least 1 kHz below the edge of the segment
C	At least 3 kHz above the edge of the band
D	At least 3 kHz below the edge of the band

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

21. - G5A05

How does an inductor 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 decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance increases

22. - G5B03

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

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

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	40 volts
B	25.5 volts
C	360 volts
D	120 volts

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	High discharge current
B	High voltage
C	Long life
D	Rapid recharge

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Multi-Mode Integrated Circuit
B	Metal Monolayer Integrated Circuit
C	Mode Modulated Integrated Circuit
D	Monolithic Microwave Integrated Circuit

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	180 degrees
B	270 degrees
C	360 degrees
D	90 degrees

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	More than 50% but less than 100%
B	100%
C	Less than 50%
D	50%

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Insertion loss
B	Rolloff
C	Notch depth
D	Ultimate rejection

29. - G8A10

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

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

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	RF input
C	Beat frequency oscillator
D	Local oscillator

31. - G8C04

Which of the following describes Baudot code?

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

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation decreases
B	Attenuation follows Marconi’s Law of Attenuation
C	Attenuation is independent of frequency
D	Attenuation increases

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily decreases
B	It steadily increases
C	It is unaffected by the location of the feed point
D	It peaks at about 1/8 wavelength from the end

34. - G9C07

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

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

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It narrows the main lobe in azimuth
B	It allows simultaneous vertical and horizontal polarization
C	It narrows the main lobe in elevation
D	It allows quick selection of vertical or horizontal polarization