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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	Take action to prevent human exposure to the excessive RF fields
B	Secure written permission from your neighbors to operate above the controlled MPE limits
C	All these choices are correct
D	File an Environmental Impact Statement (EIS-97) with the FCC

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 16
B	AWG number 12
C	AWG number 20
D	AWG number 8

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	18155 kHz
B	24900 kHz
C	21300 kHz
D	14250 kHz

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 FCC
B	The ITU
C	The IEEE
D	The control operator

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	PEP input to the antenna
B	RMS output from the transmitter
C	PEP output from the transmitter
D	RMS input to the antenna

6. - G1D10

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

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

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for licensed radio amateurs
B	Under no circumstances except for emergencies
C	Under any circumstances in which third party messages are permitted by FCC rules
D	Only when the message is intended for third parties in areas where licensing is controlled by the FCC

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

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Change frequency
B	Repeat everything twice
C	Increase your power
D	Send slower

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

12. - G2E12

Which of the following describes Winlink?

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

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. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	Periodic fading approximately every 10 seconds
B	The signal might be cancelled causing severe attenuation
C	Signal strength increased by 3 dB
D	A slightly delayed echo might be heard

15. - G3C08

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

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

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To permit full duplex operation -- that is, transmitting and receiving at the same time
B	To improve frequency accuracy by allowing variable frequency output (VFO) operation
C	To transmit on one frequency and listen on another
D	To allow transmitting on two frequencies at once

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Faster response
B	Better for measuring computer circuits
C	Less prone to overload
D	Higher precision

18. - G4C07

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

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

19. - G4D04

What does an S meter measure?

Select	Answer
A	Received signal strength
B	Impedance
C	Carrier suppression
D	Transmitter power output

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

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the frequency of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the amplitude of the applied AC increases, the reactance increases

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	1.00
B	2.00
C	1.414
D	0.707

23. - G5C13

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

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

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Screen grid
B	Trigger electrode
C	Suppressor grid
D	Control grid

25. - G6B01

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

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

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A steady DC voltage
C	A series of DC pulses at twice the frequency of the AC input
D	A sine wave at half the frequency of the AC input

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	Less than 50%
C	50%
D	100%

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To reduce power supply ripple
B	To minimize transmitter power output
C	To minimize radiation resistance
D	To present the desired impedance to the transmitter and feed line

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The carrier frequency that contains the signal
B	Spurious signals that envelop nearby frequencies
C	The waveform created by connecting the peak values of the modulated signal
D	The bandwidth of the modulated signal

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	2F1-F2
B	3F1-F2
C	All these choices are correct
D	5F1-3F2

31. - G8C07

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

Select	Answer
A	FT8
B	MFSK32
C	AMTOR
D	MSK144

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Ohms per 1,000 feet
C	Decibels per 1,000 feet
D	Ohms per 100 feet

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	21 feet
B	16 feet
C	11 feet
D	8 feet

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The direction of maximum radiated field strength from the antenna
B	The maximum voltage standing wave point on a radiating element
C	The point of maximum current in a radiating antenna element
D	The magnitude of the maximum vertical angle of radiation

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To provide balanced feed point impedance
B	To prevent out-of-band operation
C	To notch spurious frequencies
D	To enable multiband operation