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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its frequency
B	Its duty cycle
C	All these choices are correct
D	Its power density

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the ground wire
B	Only the hot wires
C	Only the neutral wire
D	All wires

3. - G1A09

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

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	On any frequency if transmissions are in Morse code
B	21.08 MHz to 21.09 MHz
C	On any frequency if power is less than 1 watt
D	28.20 MHz to 28.30 MHz

5. - G1C11

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

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

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	Whenever they operate using Technician frequency privileges
B	Whenever they operate on any amateur frequency
C	Whenever they operate using General class frequency privileges
D	A special identifier is not required if their General class license application has been filed with 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	No part
B	Channels 42 through 45
C	Anywhere in the band
D	Channels 1 through 4

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Suppressed sideband
B	Upper sideband
C	Double 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	Decrease power and continue to transmit
B	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
C	Switch to the opposite sideband
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	Operating full break-in
B	Closing station now
C	Listening only for a specific station or stations
D	No US stations should call

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
B	A map that shows accurate land masses
C	A map that shows the angle at which an amateur satellite crosses the equator
D	A map that shows true bearings and distances from a specific location

12. - G2E13

What is another name for a Winlink Remote Message Server?

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

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Increases signal strength for HF signals passing through the polar regions
B	Improve HF long path propagation
C	Creates auroras that can reflect VHF signals
D	Reduce long delayed echoes

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	World-wide propagation during daylight hours
B	Poor propagation at any time of day
C	Heavy distortion on signals due to photon absorption
D	High levels of atmospheric noise or static

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The E region is not present
B	Ground waves are absorbing much of the signal
C	The ionospheric region involved is unstable
D	Energy is scattered into the skip zone through several different paths

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To restrict the transmitter voice bandwidth
B	To remove interfering splatter generated by signals on adjacent frequencies
C	To reduce interference from carriers in the receiver passband
D	To eliminate receiver interference from impulse noise sources

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	All these choices are correct
B	Received power that interferes with SWR readings
C	Generation of harmonics which interfere with frequency readings
D	Desensitization which can cause intermodulation products which interfere with impedance readings

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents signal overload
B	It prevents a blown fuse in the event of an internal short circuit
C	It ensures that hazardous voltages cannot appear on the chassis
D	It ensures that the neutral wire is grounded

19. - G4D04

What does an S meter measure?

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

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Series-parallel
B	Shunt
C	Bypass
D	Full-wave bridge

21. - G5A05

How does an inductor react to AC?

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

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 11 watts
B	Approximately 11 milliwatts
C	Approximately 61 watts
D	Approximately 61 milliwatts

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 accommodate the higher current of the primary
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
D	To improve the coupling between the primary and secondary

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Harmonics are generated
B	Its reactance increases
C	It becomes capacitive
D	Catastrophic failure is likely

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	The magnetic properties of the core may be optimized for a specific range of frequencies
B	Large values of inductance may be obtained
C	All these choices are correct
D	Most of the magnetic field is contained in the core

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 4
B	Symbol 6
C	Symbol 7
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	Add the RF input power to the DC output power
D	Multiply the RF input power by the reciprocal of the RF output power

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	Minimum detectible signal level is reduced
C	The need for high resolution analog-to-digital converters is eliminated
D	Automatic conversion of the signal from digital to analog

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By changing an oscillator’s frequency directly with a digital control signal
C	By keying an FM transmitter with a sub-audible tone
D	By using a transceiver’s computer data interface protocol to change frequencies

30. - G8B03

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

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

31. - G8C09

Which is true of mesh network microwave nodes?

Select	Answer
A	Having more nodes increases signal strengths
B	More nodes reduce overall microwave out of band interference
C	Links between two nodes in a network may have different frequencies and bandwidths
D	If one node fails, a packet may still reach its target station via an alternate node

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	5:1
D	1:5

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It peaks at about 1/8 wavelength above ground
B	It is unaffected by the height above ground
C	It steadily increases
D	It steadily decreases

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
B	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
C	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
B	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
C	A vertical dipole placed at approximately 1/2 wavelength above the ground
D	A horizontal dipole placed at approximately 1/2 wavelength above the ground

Figure G7-1