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

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	Tin in the solder can “cold flow,” causing shorts in the circuit
C	RF energy can convert the lead into a poisonous gas
D	Lead can contaminate food if hands are not washed carefully after handling the solder

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	12 meters
B	11 meters
C	60 meters
D	30 meters

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The IEEE
B	The FCC
C	The control operator
D	The ITU

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	56 kilobaud
C	300 baud
D	19.6 kilobaud

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of the remote station’s country and the FCC’s third-party regulations
B	Only those of the remote station’s country
C	Only those of the FCC
D	Those of both the remote station’s country and the FCC

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All these choices are correct
B	When using a band where the Amateur Service is secondary
C	When operating within one mile of an FCC Monitoring Station
D	When a station is transmitting spread spectrum emissions

8. - G2A08

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

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

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Advise the interfering stations that you are on the frequency and that you have priority
B	Decrease power and continue to transmit
C	Switch to the opposite sideband
D	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

10. - G2C03

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

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

11. - G2D02

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

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

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Transmit a connect message on the station’s published frequency
B	Respond when the station broadcasts its SSID
C	Send QRL in Morse code
D	Send an email to the system control operator

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Creates auroras that can reflect VHF signals
B	Reduce long delayed echoes
C	Increases signal strength for HF signals passing through the polar regions
D	Improve HF long path propagation

14. - G3B03

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

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

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The E region is not present
B	Ground waves are absorbing much of the signal
C	The ionospheric region involved is unstable
D	Energy is scattered into the skip zone through several different paths

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To reduce harmonic radiation
C	To prevent excessive drive
D	To balance the transmitter audio frequency response

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

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	The SWR reading for one or more antennas is suddenly very high
B	You receive reports of harmonic interference from your station
C	An item of station equipment starts to draw excessive amounts of current
D	You receive reports of “hum” on your station’s transmitted signal

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 7.184 MHz
B	7.1765 MHz to 7.1795 MHz
C	7.175 MHz to 7.178 MHz
D	7.178 MHz to 7.181 MHz

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 damage to the battery due to excessive voltage at high illumination levels
C	To limit the current flowing from the panel to a safe value
D	To prevent overload by regulating the charging voltage

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Siemens
B	Ampere
C	Ohm
D	Farad

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 11 milliwatts
B	Approximately 61 milliwatts
C	Approximately 61 watts
D	Approximately 11 watts

23. - G5C09

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

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

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is formed by a back-biased junction
B	The gate is separated from the channel by a thin insulating layer
C	The source is formed by depositing metal on silicon
D	The source is separated from the drain by a thin insulating layer

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	Most of the magnetic field is contained in the core
B	Large values of inductance may be obtained
C	All these choices are correct
D	The magnetic properties of the core may be optimized for a specific range of frequencies

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It discharges the filter capacitors when power is removed
B	It removes shock hazards from the induction coils
C	It eliminates ground loop current
D	It acts as a fuse for excess voltage

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Carrier oscillator
B	IF amplifier
C	RF amplifier
D	Filter

29. - G8A09

What type of modulation is used by FT8?

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

30. - G8B06

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

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

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	SSB-SC
B	WSPR
C	MFSK16
D	PSK31

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	Between 1:1 and 5:1 depending on the reflected power at the transmitter
D	1:1

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	84 feet
B	263 feet
C	42 feet
D	132 feet

34. - G9C03

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

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

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They must be fed with open wire line
B	They present low impedance on all design frequencies
C	They must be used with an antenna tuner
D	They have poor harmonic rejection