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

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Overvoltage on the hot wires
B	Current flowing from one or more of the hot wires directly to ground
C	Current flowing from one or more of the hot wires to the neutral wire
D	All these choices are correct

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations may use the band only during emergencies
B	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
C	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
D	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station

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

5. - G1C11

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

Select	Answer
A	RMS output from the transmitter
B	PEP output from the transmitter
C	PEP input to the antenna
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	18 years
B	16 years
C	There is no age limit
D	21 years

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	When a station is transmitting spread spectrum emissions
C	All these choices are correct
D	When operating within one mile of an FCC Monitoring Station

8. - G2A02

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

Select	Answer
A	Lower sideband
B	Upper sideband
C	Suppressed sideband
D	Double sideband

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Except during emergencies, no amateur station has priority access to any frequency
B	Contest operations should yield to non-contest use of frequencies
C	QSOs in progress have priority
D	Nets have priority

10. - G2C07

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

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

11. - G2D10

What is QRP operation?

Select	Answer
A	Remote piloted model control
B	Low-power transmit operation
C	Transmission using Quick Response Protocol
D	Traffic relay procedure net operation

12. - G2E13

What is another name for a Winlink Remote Message Server?

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

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	Ripples in the geomagnetic force
C	A temporary disturbance in Earth’s geomagnetic field
D	A thunderstorm that affects radio propagation

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are amplified by interaction with the ionosphere
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are refracted back to Earth
D	They pass through the ionosphere

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The highest frequency which is refracted back to Earth
B	The lowest frequency which is refracted back to Earth
C	The frequency at which the signal-to-noise ratio approaches unity
D	The frequency at which the signal-to-noise ratio is 6 dB

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Reduce the SWR in the feed line to the antenna
B	All these choices are correct
C	Increase power transfer from the transmitter to the feed line
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Front-to-back ratio of an antenna
B	Power output from a transmitter
C	Impedance of coaxial cable
D	Gain of a directional antenna

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Connect the AC neutral conductor to the ground wire
B	Connect all ground conductors in series
C	Bond equipment enclosures together
D	Avoid using lock washers and star washers when making ground connections

19. - G4D01

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

Select	Answer
A	Decrease high-frequency voice output to prevent out-of-band operation
B	Prevent distortion of voice signals
C	Increase transmitter bass response for more natural-sounding SSB 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	The wire gauge of the DC power line to the transceiver
B	“Picket fencing”
C	Efficiency of the electrically short antenna
D	FCC rules limiting mobile output power on the 75-meter band

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A transformer
B	All these choices are correct
C	A Pi-network
D	A length of transmission line

22. - G5B08

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

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

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	10.750 nanofarads
B	576.9 nanofarads
C	3,583 picofarads
D	1,733 picofarads

24. - G6A06

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

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

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	50 MHz
B	40 GHz
C	500 MHz
D	4 GHz

26. - G7A11

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

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

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	6
B	8
C	16
D	3

28. - G7C03

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

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

29. - G8A13

What is a link budget?

Select	Answer
A	The financial costs associated with operating a radio link
B	The difference between transmit power and receiver sensitivity
C	The sum of antenna gains minus system losses
D	The sum of transmit power and antenna gains minus system losses as seen at the receiver

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	RF input
B	Beat frequency oscillator
C	Local oscillator
D	Image frequency

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	MSK144
D	AMTOR

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss increases the accuracy of SWR measured at the input to the line
B	Higher loss reduces SWR measured at the input to the line
C	Higher loss increases SWR measured at the input to the line
D	Transmission line loss does not affect the SWR measurement

33. - G9B11

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

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

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The relative position of the driven element with respect to the reflectors and directors
B	The number of directors versus the number of reflectors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The ratio of forward gain to dipole gain

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	Wide bandwidth
D	Polarization diversity

Figure G7-1