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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Locate the antenna close to your operating position to minimize feed-line radiation
B	Position the antenna along the edge of a wall to reduce parasitic radiation
C	Make sure the antenna is properly shielded
D	Make sure that MPE limits are not exceeded in occupied areas

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?

Select	Answer
A	AWG number 8
B	AWG number 12
C	AWG number 16
D	AWG number 20

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

Select	Answer
A	160 meters, 60 meters, 15 meters, and 12 meters
B	60 meters, 30 meters, 17 meters, and 12 meters
C	80 meters, 20 meters, 15 meters, and 10 meters
D	80 meters, 40 meters, 20 meters, and 15 meters

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	100 feet
B	50 feet
C	250 feet
D	200 feet

5. - G1C05

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

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

6. - G1D01

Who may receive partial credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago
B	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
C	Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
D	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When under automatic control
B	When messages are encrypted
C	Under no circumstances
D	When messages are not encrypted

8. - G2A08

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

Select	Answer
A	Say your call sign once
B	Say “QRZ” several times, followed by your call sign
C	Say “CQ” followed by the call sign of either station
D	Say “Breaker Breaker”

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

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

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	I have received and understood
B	We have already confirmed the contact
C	Send slower
D	We have worked before

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	To help with a reply if the FCC requests information about your station
C	The FCC requires a log of all international third-party traffic
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	DSB
B	USB
C	SSB
D	LSB

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is improved
B	VHF/UHF ducting is improved
C	HF communication is disturbed
D	VHF/UHF ducting is disturbed

14. - G3B03

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

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

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F1 region
B	The D region
C	The E region
D	The F2 region

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A pronounced peak
B	No change will be observed
C	A slow, rhythmic oscillation
D	A pronounced dip

17. - G4B12

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

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

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Forward-biased diode
B	Reverse-biased diode
C	Bypass inductor
D	Bypass capacitor

19. - G4D11

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

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

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ensure the battery is placed terminals-up
B	The solar panel must have a charge controller
C	Ground the solar panel outer metal framework
D	A series resistor must be in place

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Reluctance
C	Reactance
D	Admittance

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	1060 watts
B	530 watts
C	2120 watts
D	1500 watts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	0.17 ohms
B	5.9 ohms
C	80 ohms
D	17 ohms

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	1.0 volts
B	0.3 volts
C	0.7 volts
D	0.1 volt

25. - G6B10

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

Select	Answer
A	Ferrites expel magnetic fields
B	By creating an impedance in the current’s path
C	By creating an out-of-phase current to cancel the common-mode current
D	It converts common-mode current to differential mode current

26. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	360 degrees
B	90 degrees
C	270 degrees
D	180 degrees

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The time delay of the lag circuit
C	The number of stages in the counter
D	The inductance and capacitance in the tank circuit

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Modulation
B	All these choices are correct
C	Filtering
D	Detection

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	Rolloff
B	Intermodulation
C	Heterodyning
D	Detection

31. - G8C09

Which is true of mesh network microwave nodes?

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

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	4:1
B	1:4
C	2:1
D	1:2

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

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Front-to-back ratio decreases
B	Beamwidth increases
C	Gain increases
D	Resonant frequency is lower

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Element length and spacing vary logarithmically along the boom
B	Impedance varies periodically as a function of frequency
C	Gain varies logarithmically as a function of frequency
D	SWR varies periodically as a function of boom length