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

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable bandwidth limits
B	Electrical safety of the station
C	Acceptable modulation limits
D	RF exposure limits of the human body

3. - G1A04

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

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

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They are limited to those expressly listed in Part 97 of the FCC rules
B	Only “Q” signals are permitted
C	They may be used if they do not obscure the meaning of a message
D	They are not permitted

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
B	Obtain an experimental license from the FCC
C	Type-certify equipment to FCC standards
D	Publicly document the technical characteristics of the protocol

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of Technician class
B	At least two Volunteer Examiners of Technician class or higher
C	At least two Volunteer Examiners of General class or higher
D	At least three Volunteer Examiners of General class or higher

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must relate to emergencies or disaster relief
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	They must be for other licensed amateurs
D	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	100 percent copy
B	Chirpy or unstable signal
C	Key clicks
D	Report was read from an S meter rather than estimated

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to operate according to conditions
B	To allow each station to calibrate their frequency display
C	To be sure the contact will count for award programs
D	To follow standard radiogram structure

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	RJ-45
B	Printer/Server
C	Terminal Node Controller
D	Gateway

13. - G3A05

What is the solar flux index?

Select	Answer
A	A count of sunspots that is adjusted for solar emissions
B	Another name for the American sunspot number
C	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
D	A measure of solar radiation with a wavelength of 10.7 centimeters

14. - G3B03

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

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

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Phone signals have high intelligibility
B	Signals have a fluttering sound
C	Scatter propagation occurs only at night
D	There are very large, sudden swings in signal strength

16. - G4A05

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

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

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Greater precision
B	Complex waveforms can be measured
C	An oscilloscope uses less power
D	Complex impedances can be easily measured

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Bonding all equipment enclosures together
B	Building all equipment in a metal enclosure
C	Using surge suppressor power outlets
D	Placing low-pass filters on all feed lines

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Increase transmitter bass response for more natural-sounding SSB signals
B	Decrease high-frequency voice output to prevent out-of-band operation
C	Prevent distortion of voice signals
D	Increase the apparent loudness of transmitted voice signals

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	“Picket fencing”
B	Efficiency of the electrically short antenna
C	The wire gauge of the DC power line to the transceiver
D	FCC rules limiting mobile output power on the 75-meter band

21. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency 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	2.00
B	1.00
C	1.414
D	0.707

23. - G5C02

What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

Select	Answer
A	The input voltage is divided by 4
B	Additional resistance must be added in parallel with the secondary to prevent overload
C	Additional resistance must be added in series with the primary to prevent overload
D	The input voltage is multiplied by 4

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Enhancement and depletion modes
B	Peak and valley current points
C	Saturation and cutoff
D	The active region (between cutoff and saturation)

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Monolithic Microwave Integrated Circuit
B	Metal Monolayer Integrated Circuit
C	Multi-Mode Integrated Circuit
D	Mode Modulated Integrated Circuit

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 7
B	Symbol 2
C	Symbol 11
D	Symbol 1

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input power
B	Divide the DC input power by the DC output 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. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier gain
B	Demodulator stage bandwidth
C	All these choices are correct
D	Input amplifier noise figure

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	It is sideband sensitive
B	Its bandwidth is approximately the same as BPSK31
C	All these choices are correct
D	Its encoding provides error correction

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Synthesizing
B	Frequency inversion
C	Phase inversion
D	Heterodyning

31. - G8C10

How does forward error correction (FEC) allow the receiver to correct data errors?

Select	Answer
A	By transmitting redundant information with the data
B	By controlling transmitter output power for optimum signal strength
C	By using a parity bit with each character
D	By using the Varicode character set

32. - G9A01

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

Select	Answer
A	The radius of the conductors and the frequency of the signal
B	The distance between the centers of the conductors and the length of the line
C	The distance between the centers of the conductors and the radius of the conductors
D	The frequency of the signal and the length 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	132 feet
B	263 feet
C	42 feet
D	84 feet

34. - G9C12

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

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

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It allows quick selection of vertical or horizontal polarization
B	It allows simultaneous vertical and horizontal polarization
C	It narrows the main lobe in azimuth
D	It narrows the main lobe in elevation

Figure G7-1