US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

Select	Answer
A	Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels
B	Post a copy of FCC Part 97.13 in the station
C	Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
D	All these choices are correct

2. - G0B12

What is the purpose of a power supply interlock?

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

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	60 meters, 30 meters, 17 meters, and 12 meters
B	All HF bands
C	All HF bands except 160 meters and 10 meters
D	80 meters, 40 meters, 20 meters, and 15 meters

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	200 feet
B	250 feet
C	50 feet
D	100 feet

5. - G1C01

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

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

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	180 days
C	30 days
D	365 days

7. - G1E06

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

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

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 “QRZ” several times, followed by your call sign
C	Say your call sign once
D	Say “Breaker Breaker”

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per month
B	No more than 2 hours per week
C	No more than 2 hours per month
D	No more than 1 hour per week

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	There is interference on the frequency
B	You are sending too fast
C	I am quitting for the day
D	I am ready to receive

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 coordinate repeaters for efficient and orderly spectrum usage
C	To conduct efficient and orderly amateur licensing examinations
D	To provide emergency and public safety communications

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

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	20 to 40 hours
B	28 days
C	8 minutes
D	1 to 2 hours

14. - G3B02

What factors affect the MUF?

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

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Only a small part of the signal energy is scattered into the skip zone
B	Signals are scattered from the magnetosphere, which is not a good reflector
C	Propagation is via ducts in the F region, which absorb most of the energy
D	Propagation is via ground waves, which absorb most of the signal energy

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
C	To prevent key clicks on CW
D	To prevent transient overmodulation

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 transmitter balanced mixer output
B	The attenuated RF output of the transmitter
C	An external RF oscillator
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 has too high a dielectric constant to provide adequate lightning protection
B	Solder flux will prevent a low conductivity connection
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	All these choices are correct

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It reduces intermodulation distortion
B	It increases average power
C	It increases peak power
D	It reduces harmonic distortion

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To electrically lengthen a physically short antenna
B	To increase the power handling capacity of a whip antenna
C	To lower the radiation angle
D	To reduce radiation resistance

21. - G5A08

What is impedance?

Select	Answer
A	The ratio of voltage to current
B	The product of current and reactance
C	The product of current and voltage
D	The ratio of current to voltage

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 3 dB
B	Approximately 9 dB
C	Approximately 6 dB
D	Approximately 2 dB

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	An inductor in parallel
B	A capacitor in parallel
C	An inductor in series
D	A capacitor in series

24. - G6A06

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

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

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its conductivity
B	Its thickness
C	The composition, or “mix,” of materials used
D	The ratio of outer diameter to inner diameter

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Faster switching time makes higher output voltage possible
B	Fewer circuit components are required
C	High-frequency operation allows the use of smaller components
D	Inherently more stable

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Divide the RF output power by the DC input power
C	Multiply the RF input power by the reciprocal of the RF output power
D	Add the RF input power to the DC output power

28. - G7C06

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

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

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 carrier frequency that contains the signal
C	Spurious signals that envelop nearby frequencies
D	The bandwidth of the modulated signal

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The sum and difference
B	The average
C	The ratio
D	The arithmetic product

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	MSK144
B	FT8
C	MFSK32
D	AMTOR

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
B	The antenna feed point must be at DC ground potential
C	The feed line must be an even number of physical half wavelengths long
D	The feed line must be an odd number of electrical quarter wavelengths long

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. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	It is useful for matching multiband antennas
B	All these choices are correct
C	It does not require any inductors or capacitors
D	It does not require the driven element to be insulated from the boom

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

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