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

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	All these choices are correct
B	Always hold on to the tower with one hand
C	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
D	Ensure that all heavy tools are securely fastened to the harness

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	30 meters
B	160 meters
C	12 meters
D	20 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	200 feet
B	100 feet
C	250 feet
D	50 feet

5. - G1C07

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

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

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	Whenever they operate using Technician frequency privileges
B	Whenever they operate using General class frequency privileges
C	Whenever they operate on any amateur frequency
D	A special identifier is not required if their General class license application has been filed 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	Under no circumstances
B	When under automatic control
C	When messages are not encrypted
D	When messages are encrypted

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single phase modulation
B	Double sideband
C	Single sideband
D	Frequency modulation

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Inform your local emergency coordinator
B	Acknowledge the station in distress and determine what assistance may be needed
C	Immediately decrease power to avoid interfering with the station in distress
D	Immediately cease all transmissions

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Operating split to avoid interference on frequency
B	Matching the transmit frequency to the frequency of a received signal
C	Sending without error
D	Matching the speed of the transmitting station

11. - G2D10

What is QRP operation?

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

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	850 Hz
B	170 Hz
C	85 Hz
D	425 Hz

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It enhances propagation on all HF frequencies
B	It disrupts communications via satellite more than direct communications
C	None, because only areas on the night side of the Earth are affected
D	It disrupts signals on lower frequencies more than those on higher frequencies

14. - G3B11

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

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

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

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

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By clipping noise peaks
B	By redirecting noise pulses into a filter capacitor
C	By reducing receiver gain during a noise pulse
D	By temporarily increasing received bandwidth

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It decreases the loading on circuits being measured
B	It allows for higher voltages to be safely measured
C	It improves the frequency response
D	It improves the resolution of the readings

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	Overheating of ground straps
B	High RF voltages on the enclosures of station equipment
C	A ground loop
D	Corrosion of the ground rod

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. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To electrically lengthen a physically short antenna
B	To lower the radiation angle
C	To reduce radiation resistance
D	To increase the power handling capacity of a whip antenna

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance decreases

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	692 volts
B	346 volts
C	173 volts
D	245 volts

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	1,000 microfarads
B	70 microfarads
C	0.07 microfarads
D	14.3 microfarads

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	The active region (between cutoff and saturation)
B	Peak and valley current points
C	Saturation and cutoff
D	Enhancement and depletion modes

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Forward biased
B	At the Zener voltage
C	Reverse biased
D	In the tunnel-effect region

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A sine wave at half the frequency of the AC input
B	A steady DC voltage
C	A series of DC pulses at the same frequency as the AC input
D	A series of DC pulses at twice the frequency of the AC input

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	An amplifier in which the output preserves the input waveform
B	Any RF power amplifier used in conjunction with an amateur transceiver
C	A Class C high efficiency amplifier
D	An amplifier used as a frequency multiplier

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Double-sideband modulated RF
B	Audio extracted from the modulation signal
C	Frequency modulated RF
D	Audio with equalized frequency response

29. - G8A11

What is the modulation envelope of an AM signal?

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

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Quadrature response
B	Intermediate interference
C	Image response
D	Mixer interference

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	High and low
B	On and off
C	Mark and space
D	Dot and dash

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 1,000 feet
B	Decibels per 1,000 feet
C	Decibels per 100 feet
D	Ohms per 100 feet

33. - G9B11

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

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

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	The reflector is shorter, and the director is longer
B	The reflector is longer, and the director is shorter
C	They are all the same length
D	Relative length depends on the frequency of operation

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Wide bandwidth
B	Polarization diversity
C	Harmonic suppression
D	Higher gain per element than a Yagi antenna