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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By measurement of field strength using calibrated equipment
B	By calculation based on FCC OET Bulletin 65
C	By calculation based on computer modeling
D	All these choices are correct

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut off the power supply if too much voltage is produced
B	To ensure that dangerous voltages are removed if the cabinet is opened
C	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
D	To shut down the unit if it becomes too hot

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	17 meters
B	160 meters
C	30 meters
D	12 meters

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	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
B	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
C	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
D	Only when the foreign country has a formal third-party agreement filed with the FCC

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	5.6 kHz
B	3 kHz
C	2.8 kHz
D	1.8 kHz

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

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

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	The received signal is more natural sounding
B	It provides more power output
C	It occupies less bandwidth
D	It allows “hands free” operation

9. - G2B03

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

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

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Will you keep the frequency clear?”
B	“Are you busy?” or “Is this frequency in use?”
C	“Are you operating full break-in?” or “Can you operate full break-in?”
D	“Are you listening only for a specific station?”

11. - G2D02

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

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

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	A wireless network capable of both VHF and HF band operation
B	A form of Packet Radio
C	All of the above
D	An amateur radio wireless network to send and receive email on the internet

13. - G3A01

How does a higher sunspot number affect HF propagation?

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

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency during a 24-hour period
B	The Minimum Usable Frequency during a 24-hour period
C	The Minimum Usable Frequency for communications between two points
D	The Maximum Usable Frequency for communications between two points

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The long path azimuth of a distant station
B	The short path azimuth of a distant station
C	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

16. - G4A03

How does a noise blanker work?

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

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

18. - G4C07

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

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

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 1.5 times
B	Approximately 8 times
C	Approximately 2 times
D	Approximately 4 times

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
B	Drawing more than 50 watts from this socket could cause the engine to overheat
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	The socket is not wired with an RF-shielded power cable

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Inductive reactance and capacitive reactance cancel
B	The circuit radiates all its energy in the form of radio waves
C	Resistance is cancelled
D	Current and voltage are equal

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	240.0 volts
B	169.7 volts
C	339.4 volts
D	84.8 volts

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 improve the coupling between the primary and secondary
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 prevent parasitic oscillations due to resistive losses in the primary

24. - G6A06

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

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	Ferrites expel magnetic fields
B	By creating an impedance in the current’s path
C	It converts common-mode current to differential mode current
D	By creating an out-of-phase current to cancel the common-mode current

26. - G7A05

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

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

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	Any RF power amplifier used in conjunction with an amateur transceiver
B	An amplifier in which the output preserves the input waveform
C	An amplifier used as a frequency multiplier
D	A Class C high efficiency amplifier

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Mixing products are greatly reduced
B	Fewer digital components are required
C	The DSP filter is much more effective at VHF frequencies
D	A wide range of filter bandwidths and shapes can be created

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Frequency modulation
C	Phase modulation
D	Power modulation

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Intercept point
B	Odd-order
C	Second harmonics
D	Even-order

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	FT8, FT4, and FST4
B	WSPR, MFSK16, and EasyPAL
C	Winlink, PACTOR II, and PACTOR III
D	DMR, D-STAR, and SystemFusion

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

33. - G9B11

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

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

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Gain increases
B	Resonant frequency is lower
C	Beamwidth increases
D	Front-to-back ratio decreases

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Higher gain per element than a Yagi antenna
B	Harmonic suppression
C	Polarization diversity
D	Wide bandwidth