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	Make sure that MPE limits are not exceeded in occupied areas
C	Make sure the antenna is properly shielded
D	Position the antenna along the edge of a wall to reduce parasitic radiation

2. - G0B07

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

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

3. - G1A01

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

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

4. - G1B03

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

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

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	56 kilobaud
B	300 baud
C	19.6 kilobaud
D	1200 baud

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	A Volunteer Examiner Coordinator
C	The Wireless Telecommunications Bureau
D	The Federal Communications Commission

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 4
B	Region 2
C	Region 3
D	Region 1

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Transmit audio or microphone gain
B	Antenna inductance or capacitance
C	RF clipping level
D	Attenuator level

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

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Closing station now
B	Operating full break-in
C	No US stations should call
D	Listening only for a specific station or stations

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
B	Amateur volunteers who conduct amateur licensing examinations
C	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

12. - G2E08

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

Select	Answer
A	Between 14.070 MHz and 14.100 MHz
B	In the middle of the CW segment, near 14.100 MHz
C	At the top of the SSB phone segment, near 14.325 MHz
D	At the bottom of the slow-scan TV segment, near 14.230 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?

Select	Answer
A	1 to 2 hours
B	8 minutes
C	20 to 40 hours
D	28 days

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Use a network of automated receiving stations on the internet to see where your transmissions are being received
B	Check the A-index
C	Send a series of dots and listen for echoes
D	All these choices are correct

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Short-path
B	Chordal hop
C	Faraday rotation
D	Scatter

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To remove interfering splatter generated by signals on adjacent frequencies
B	To restrict the transmitter voice bandwidth
C	To reduce interference from carriers in the receiver passband
D	To eliminate receiver interference from impulse noise sources

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio frequency range square wave signals of equal amplitude
B	Two non-harmonically related audio signals
C	Two swept frequency tones
D	Two audio signals of the same frequency shifted 90 degrees

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground wire has high impedance on that frequency
B	Insulated wire has been used for the ground wire
C	Flat braid rather than round wire has been used for the ground wire
D	The ground rod is resonant

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It reduces intermodulation distortion
B	It increases peak power
C	It reduces harmonic distortion
D	It increases average power

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To increase the “Q” of the antenna
B	To narrow the operating bandwidth of the antenna
C	To reduce RF voltage discharge from the tip of the antenna while transmitting
D	To reduce the chance of damage if the antenna should strike an object

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 amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	12.2 percent
B	25.9 percent
C	10.9 percent
D	20.6 percent

23. - G5C07

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

Select	Answer
A	12 to 1
B	3.5 to 1
C	24 to 1
D	144 to 1

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor’s tolerance value would not be adequate
B	The resistor could overheat
C	The resistor’s internal capacitance would detune the circuit
D	The resistor’s inductance could make circuit performance unpredictable

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. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	The ripple frequency is twice that of a full-wave rectifier
B	Only one diode is required
C	The output voltage is two times the peak input voltage
D	More current can be drawn from the half-wave rectifier

27. - G7B06

What is a shift register?

Select	Answer
A	An analog mixer
B	A digital mixer
C	An array of operational amplifiers used for tri-state arithmetic operations
D	A clocked array of circuits that passes data in steps along the array

28. - G7C10

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

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

29. - G8A10

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

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

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Lower symbol rates require wider bandwidth
B	Bandwidth is half the symbol rate
C	Symbol rate and bandwidth are not related
D	Higher symbol rates require wider bandwidth

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Request retransmission of the packet
B	Receiving station connected and ready for transmissions
C	Entire file received correctly
D	Packet was received without error

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Transmission line loss does not affect the SWR measurement
B	Higher loss increases the accuracy of SWR measured at the input to the line
C	Higher loss reduces SWR measured at the input to the line
D	Higher loss increases SWR measured at the input to the line

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

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The relative position of the driven element with respect to the reflectors and directors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The number of directors versus the number of reflectors

35. - G9D08

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

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