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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	All stations with a time-averaged transmission of more than one milliwatt
B	Only stations transmitting more than 500 watts PEP
C	Only stations with antennas lower than one wavelength above the ground
D	All commercial stations; amateur radio stations are exempt

2. - G0B10

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

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

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	21.275 MHz to 21.300 MHz
C	28.000 MHz to 28.025 MHz
D	All these choices are correct

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	All these choices are correct
B	Transmission of bulletins of general interest to amateur radio licensees
C	Observation of propagation and reception
D	Automatic identification of repeaters

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	50 watts PEP output
B	1500 watts PEP output
C	200 watts PEP output
D	An effective radiated power equivalent to 100 watts from a half-wave dipole

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	18 years
B	16 years
C	21 years
D	There is no age limit

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only during an FCC-declared general state of communications emergency
B	Only if the 10-meter repeater control operator holds at least a General class license
C	Under no circumstances
D	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B03

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

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

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

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Find a clear frequency during the alternate time slot to the calling station
B	Find a clear frequency during the same time slot as the calling station
C	Call on any frequency in the waterfall except the station’s frequency
D	Always call on the station’s frequency

13. - G3A11

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

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

14. - G3B06

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

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

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of temperature inversions
B	Because it is the densest
C	Because of the Doppler effect
D	Because it is the highest

16. - G4A03

How does a noise blanker work?

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

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When testing logic circuits
B	When adjusting circuits for maximum or minimum values
C	When high precision is desired
D	When measuring the frequency of an oscillator

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground rod is resonant
B	Flat braid rather than round wire has been used for the ground wire
C	The ground wire has high impedance on that frequency
D	Insulated wire has been used for the ground wire

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

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

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

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Reluctance
B	Admittance
C	Conductance
D	Susceptance

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	24 watts
B	60 watts
C	6 watts
D	2.4 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	360 volts
C	25.5 volts
D	120 volts

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	Comparatively low cost
C	High capacitance for given volume
D	High stability

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	500 MHz
B	50 MHz
C	40 GHz
D	4 GHz

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

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	All types of modulation can be created with appropriate processing
B	The need for high resolution analog-to-digital converters is eliminated
C	Minimum detectible signal level is reduced
D	Automatic conversion of the signal from digital to analog

29. - G8A13

What is a link budget?

Select	Answer
A	The sum of transmit power and antenna gains minus system losses as seen at the receiver
B	The financial costs associated with operating a radio link
C	The sum of antenna gains minus system losses
D	The difference between transmit power and receiver sensitivity

30. - G8B06

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

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

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	Encoding reverts to the default character set
B	The checksum overflows
C	Packets will be routed incorrectly
D	The connection is dropped

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The radius of the conductors and the frequency of the signal
C	The frequency of the signal and the length of the line
D	The distance between the centers of the conductors and the radius of the conductors

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	24 feet
B	16 feet
C	8 feet
D	33 feet

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 power radiated in the major lobe compared to that in the opposite direction
D	The number of directors versus the number of reflectors

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By extending and retracting the whip
B	By varying its body capacitance
C	By varying the base loading inductance
D	By deploying a capacitance hat