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

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Tin in the solder can “cold flow,” causing shorts in the circuit
B	High voltages can cause lead-tin solder to disintegrate suddenly
C	Lead can contaminate food if hands are not washed carefully after handling the solder
D	RF energy can convert the lead into a poisonous gas

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

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Automatic retransmission of other amateur signals by any amateur station
B	Unidentified transmissions of less than 10 seconds duration for test purposes only
C	Encrypted messages, if not intended to facilitate a criminal act
D	Occasional retransmission of weather and propagation forecast information from US government stations

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1000 watts PEP output
B	2000 watts PEP output
C	100 watts PEP output
D	1500 watts PEP output

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must be a resident of the US for a minimum of 5 years
B	The person’s home citizenship must be in ITU region 2
C	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
D	The person must hold an FCC granted amateur radio license of General class or above

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	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
B	They must relate to emergencies or disaster relief
C	They must be for other licensed amateurs
D	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief

8. - G2A02

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

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

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per month
B	No more than 1 hour per week
C	No more than 2 hours per week
D	No more than 2 hours per month

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Transmitting stations can receive between code characters and elements
B	An operator must activate a manual send/receive switch before and after every transmission
C	Breaking stations send the Morse code prosign “BK”
D	Automatic keyers, instead of hand keys, are used to send Morse code

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Toward the rising sun
B	Along the gray line
C	Toward the north
D	180 degrees from the station’s short-path heading

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	All these choices are correct
B	Frequent retries or timeouts
C	Long pauses in message transmission
D	Failure to establish a connection between stations

13. - G3A09

How can high geomagnetic activity benefit radio communications?

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

14. - G3B09

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?

Select	Answer
A	12,000 miles
B	180 miles
C	2,500 miles
D	1,200 miles

15. - G3C07

What makes HF scatter signals often sound distorted?

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

16. - G4A12

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

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

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	Desensitization which can cause intermodulation products which interfere with impedance readings
D	Generation of harmonics which interfere with frequency readings

18. - G4C11

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

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

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz below the edge of the segment
B	At least 1 kHz below the edge of the segment
C	At least 3 kHz above the edge of the segment
D	At least 1 kHz above the edge of the segment

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket is not wired with an RF-shielded power cable
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	The socket’s wiring may be inadequate for the current drawn by the transceiver

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Reluctance
B	Admittance
C	Conductance
D	Susceptance

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	2.4 watts
B	6 watts
C	60 watts
D	24 watts

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	0.33 microfarads
B	3.0 microfarads
C	300 microfarads
D	33.3 microfarads

24. - G6A08

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

Select	Answer
A	High capacitance for given volume
B	Tight tolerance
C	High stability
D	Comparatively low cost

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Better suited for power supply regulation
B	Better suited for RF amplification
C	Low power consumption
D	High power handling capability

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	Multiply the RF input power by the reciprocal of the RF output power
B	Add the RF input power to the DC output power
C	Divide the RF output power by the DC input power
D	Divide the DC input power by the DC output power

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Automatic conversion of the signal from digital to analog
B	The need for high resolution analog-to-digital converters is eliminated
C	All types of modulation can be created with appropriate processing
D	Minimum detectible signal level is reduced

29. - G8A11

What is the modulation envelope of an AM signal?

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

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Heterodyning
B	Detection
C	Rolloff
D	Intermodulation

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	10.7 GHz
B	432 MHz
C	2.4 GHz
D	902 MHz

32. - G9A02

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

Select	Answer
A	High SWR makes it difficult to measure transmission line loss
B	High SWR increases loss in a lossy transmission line
C	There is no relationship between transmission line loss and SWR
D	High SWR reduces the relative effect of transmission line loss

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower feed point impedance
B	Shorter radials
C	Lower radiation resistance
D	Lower ground losses

34. - G9C04

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

Select	Answer
A	Gain in dBd is 1.25 dBd higher
B	Gain in dBi is 2.15 dB higher
C	Gain in dBd is 1.25 dBd lower
D	Gain in dBi is 2.15 dB lower

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying the base loading inductance
B	By deploying a capacitance hat
C	By varying its body capacitance
D	By extending and retracting the whip

Figure G7-1