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

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1. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

SelectAnswer
AAll these choices are correct
BChange to a non-polarized antenna with higher gain
CUse an antenna with a higher front-to-back ratio
DTake precautions to ensure that the antenna cannot be pointed in their direction when they are present

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?

SelectAnswer
AAWG number 16
BAWG number 12
CAWG number 8
DAWG number 20

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

SelectAnswer
AAll these choices are correct
B7.125 MHz to 7.175 MHz
C28.000 MHz to 28.025 MHz
D21.275 MHz to 21.300 MHz

4. - G1B07

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

SelectAnswer
AThey may be used if they do not obscure the meaning of a message
BThey are not permitted
CThey are limited to those expressly listed in Part 97 of the FCC rules
DOnly “Q” signals are permitted

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

SelectAnswer
A19.6 kilobaud
B300 baud
C56 kilobaud
D1200 baud

6. - G1D10

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

SelectAnswer
A18 years
B16 years
CThere is no age limit
D21 years

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

SelectAnswer
AA system of propagation beacon stations operates on those frequencies
BThese frequencies are set aside for emergency operations
CA system of automatic digital stations operates on those frequencies
DThese frequencies are set aside for bulletins from the FCC

8. - G2A08

What is the recommended way to break into a phone contact?

SelectAnswer
ASay “CQ” followed by the call sign of either station
BSay “Breaker Breaker”
CSay your call sign once
DSay “QRZ” several times, followed by your call sign

9. - G2B10

Which of the following is good amateur practice for net management?

SelectAnswer
ATransmit the full net roster at the beginning of every session
BHave a backup frequency in case of interference or poor conditions
CAlways use multiple sets of phonetics during check-in
DAll these choices are correct

10. - G2C02

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

SelectAnswer
ASend slower
BRepeat everything twice
CIncrease your power
DChange frequency

11. - G2D08

Why do many amateurs keep a station log?

SelectAnswer
AThe FCC requires a log of all international contacts
BThe log provides evidence of operation needed to renew a license without retest
CTo help with a reply if the FCC requests information about your station
DThe FCC requires a log of all international third-party traffic

12. - G2E08

In what segment of the 20-meter band are most digital mode operations commonly found?

SelectAnswer
AIn the middle of the CW segment, near 14.100 MHz
BBetween 14.070 MHz and 14.100 MHz
CAt the bottom of the slow-scan TV segment, near 14.230 MHz
DAt the top of the SSB phone segment, near 14.325 MHz

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?

SelectAnswer
A20 to 40 hours
B8 minutes
C28 days
D1 to 2 hours

14. - G3B05

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

SelectAnswer
AThey pass through the ionosphere
BThey are refracted and trapped in the ionosphere to circle Earth
CThey are refracted back to Earth
DThey are amplified by interaction with the ionosphere

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

SelectAnswer
AThe short path azimuth of a distant station
BThe lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
CThe long path azimuth of a distant station
DThe highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

16. - G4A03

How does a noise blanker work?

SelectAnswer
ABy temporarily increasing received bandwidth
BBy reducing receiver gain during a noise pulse
CBy clipping noise peaks
DBy redirecting noise pulses into a filter capacitor

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

SelectAnswer
AWhen testing logic circuits
BWhen adjusting circuits for maximum or minimum values
CWhen measuring the frequency of an oscillator
DWhen high precision is desired

18. - G4C07

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

SelectAnswer
AAll these choices are correct
BA soldered joint will likely be destroyed by the heat of a lightning strike
CSolder flux will prevent a low conductivity connection
DSolder has too high a dielectric constant to provide adequate lightning protection

19. - G4D01

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

SelectAnswer
ADecrease high-frequency voice output to prevent out-of-band operation
BIncrease transmitter bass response for more natural-sounding SSB signals
CPrevent distortion of voice signals
DIncrease the apparent loudness of transmitted voice signals

20. - G4E05

Which of the following most limits an HF mobile installation?

SelectAnswer
AEfficiency of the electrically short antenna
B“Picket fencing”
CFCC rules limiting mobile output power on the 75-meter band
DThe wire gauge of the DC power line to the transceiver

21. - G5A12

What occurs in an LC circuit at resonance?

SelectAnswer
ACurrent and voltage are equal
BResistance is cancelled
CThe circuit radiates all its energy in the form of radio waves
DInductive reactance and capacitive reactance cancel

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

SelectAnswer
A8.75 watts
B5000 watts
C625 watts
D2500 watts

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

SelectAnswer
A3.5 to 1
B12 to 1
C24 to 1
D144 to 1

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

SelectAnswer
ATight tolerance
BComparatively low cost
CHigh capacitance for given volume
DHigh stability

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

SelectAnswer
AIt converts common-mode current to differential mode current
BBy creating an out-of-phase current to cancel the common-mode current
CFerrites expel magnetic fields
DBy creating an impedance in the current’s path

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

SelectAnswer
ASymbol 1
BSymbol 6
CSymbol 7
DSymbol 11

27. - G7B08

How is the efficiency of an RF power amplifier determined?

SelectAnswer
ADivide the DC input power by the DC output power
BAdd the RF input power to the DC output power
CMultiply the RF input power by the reciprocal of the RF output power
DDivide the RF output power by the DC input power

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

SelectAnswer
AInsertion loss
BQ
CReturn loss
DUltimate rejection

29. - G8A11

What is the modulation envelope of an AM signal?

SelectAnswer
AThe bandwidth of the modulated signal
BThe carrier frequency that contains the signal
CSpurious signals that envelop nearby frequencies
DThe waveform created by connecting the peak values of the modulated signal

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

SelectAnswer
AIt minimizes power consumption in the receiver
BIt results in the best signal-to-noise ratio
CIt improves impedance matching of the antenna
DIt is required by FCC rules

31. - G8C10

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

SelectAnswer
ABy using the Varicode character set
BBy using a parity bit with each character
CBy controlling transmitter output power for optimum signal strength
DBy transmitting redundant information with the data

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

SelectAnswer
AHigh SWR increases loss in a lossy transmission line
BHigh SWR reduces the relative effect of transmission line loss
CThere is no relationship between transmission line loss and SWR
DHigh SWR makes it difficult to measure transmission line loss

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?

SelectAnswer
AIt peaks at about 1/8 wavelength from the end
BIt steadily increases
CIt is unaffected by the location of the feed point
DIt steadily decreases

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

SelectAnswer
AGain in dBd is 1.25 dBd lower
BGain in dBd is 1.25 dBd higher
CGain in dBi is 2.15 dB lower
DGain in dBi is 2.15 dB higher

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

SelectAnswer
AVery low
BApproximately 50 ohms
CVery high
DApproximately 300 ohms

Figure G7-1