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

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	20 amperes
B	25 amperes
C	15 amperes
D	30 amperes

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The entire band
B	The portion between 28.1 MHz and 28.2 MHz
C	The portion between 28.3 MHz and 28.5 MHz
D	The portion above 29.5 MHz

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Automatic identification of repeaters
C	All these choices are correct
D	Transmission of bulletins of general interest to amateur radio licensees

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Obtain an experimental license from the FCC
B	Publicly document the technical characteristics of the protocol
C	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
D	Type-certify equipment to FCC standards

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician class band segment except 30 meters and 60 meters
D	Only on the Technician band segments until you have a receipt for the FCC application fee payment

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	Under no circumstances
C	When messages are encrypted
D	When messages are not encrypted

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All these choices are correct
B	Listen on the frequency for at least two minutes to be sure it is clear
C	Identify your station by transmitting your call sign at least 3 times
D	Follow the voluntary band plan

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Zero beat my signal
B	Stop sending
C	Send more slowly
D	I am troubled by static

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
B	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary
C	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
D	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	An amateur radio wireless network to send and receive email on the internet
B	All of the above
C	A wireless network capable of both VHF and HF band operation
D	A form of Packet Radio

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	A zero sunspot number indicates that radio propagation is not possible on any band
B	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
C	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
D	A zero sunspot number indicates undisturbed conditions

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	HF communications over the path are enhanced
C	Double-hop propagation along the path is more common
D	Propagation via ordinary skywave communications is not possible over that path

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Propagation near the MUF
B	Long path HF propagation at sunrise and sunset
C	Short distance MF or HF propagation at high elevation angles
D	Double hop propagation near the LUF

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To balance the transmitter audio frequency response
B	To prevent excessive drive
C	To increase overall efficiency
D	To reduce harmonic radiation

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Higher precision
B	Faster response
C	Better for measuring computer circuits
D	Less prone to overload

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	You receive reports of harmonic interference from your station
C	The SWR reading for one or more antennas is suddenly very high
D	You receive reports of “hum” on your station’s transmitted signal

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

20. - G4E08

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

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

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Impedance is equal to the geometric mean of the inductance and capacitance
B	Resonance causes impedance to be very high
C	Impedance is equal to the arithmetic mean of the inductance and capacitance
D	Resonance causes impedance to be very low

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	8.5 volts
B	24 volts
C	34 volts
D	12 volts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	25.5 volts
B	40 volts
C	120 volts
D	360 volts

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To reduce grid-to-plate capacitance
B	To increase the control grid resistance
C	To decrease plate resistance
D	To increase efficiency

25. - G6B04

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

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

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 5
B	Symbol 1
C	Symbol 4
D	Symbol 11

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class C
B	Class A
C	Class B
D	Class AB

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Cutoff frequency
B	Rolloff frequency
C	Neper frequency
D	Notch frequency

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	The transmitter’s carrier is properly suppressed
B	The transmitter’s automatic level control (ALC) is properly adjusted
C	Signal distortion caused by insufficient collector current
D	Signal distortion caused by excessive drive or speech levels

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The ratio
B	The average
C	The arithmetic product
D	The sum and difference

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Long path propagation
B	Backscatter propagation
C	Insufficient modulation
D	Overmodulation

32. - G9A10

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

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

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?

Select	Answer
A	It steadily increases
B	It steadily decreases
C	It is unaffected by the location of the feed point
D	It peaks at about 1/8 wavelength from the end

34. - G9C11

What is a beta or hairpin match?

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

35. - G9D08

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

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

Figure G7-1