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

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	They must be bonded together with all other grounds
B	They must be bonded to all buried water and gas lines
C	Lightning grounds must be connected to all ungrounded wiring
D	Bends in ground wires must be made as close as possible to a right angle

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. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
B	Under no circumstances, FCC rules take priority
C	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
D	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	200 watts PEP output
B	1500 watts PEP output
C	2000 watts PEP output
D	1000 watts PEP output

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A license from the foreign country and a special remote station permit from the FCC
B	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
C	Only an appropriate US operator/primary license and a special remote station permit from the FCC
D	A US operator/primary station license

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 3
C	Region 2
D	Region 1

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. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	5 Hz to 50 Hz
C	2 kHz to 3 kHz
D	Approximately 6 kHz

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
C	A map that shows true bearings and distances from a specific location
D	A map that shows accurate land masses

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	Failure to establish a connection between stations
C	Long pauses in message transmission
D	Frequent retries or timeouts

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Long term oscillations in the upper atmosphere
B	Rotation of the Sun’s surface layers around its axis
C	The position of the Moon in its orbit
D	Cyclic variation in Earth’s radiation belts

14. - G3B04

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

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

15. - G3C09

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

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

16. - G4A01

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

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

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The transmitter balanced mixer output
B	An external RF oscillator
C	The local oscillator of the transmitter
D	The attenuated RF output of the transmitter

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Add an additional insulating jacket to the cable
B	Connect the center conductor to the shield of all cables to short circuit the RFI signal
C	Place a ferrite choke on the cable
D	Ground the center conductor of the audio cable causing the interference

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 3 kHz above the edge of the segment
C	At least 3 kHz below the edge of the segment
D	At least 1 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 reduce radiation resistance
C	To increase the power handling capacity of a whip antenna
D	To lower the radiation angle

21. - G5A03

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

Select	Answer
A	Conductance
B	Reactance
C	Reluctance
D	Admittance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	2500 watts
B	5000 watts
C	625 watts
D	8.75 watts

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	1,733 picofarads
B	3,583 picofarads
C	10.750 nanofarads
D	576.9 nanofarads

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	High voltage
B	High discharge current
C	Rapid recharge
D	Long life

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its thickness
B	Its conductivity
C	The ratio of outer diameter to inner diameter
D	The composition, or “mix,” of materials used

26. - G7A07

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

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

27. - G7B06

What is a shift register?

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

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Mixing products are greatly reduced
B	Fewer digital components are required
C	The DSP filter is much more effective at VHF frequencies
D	A wide range of filter bandwidths and shapes can be created

29. - G8A14

What is link margin?

Select	Answer
A	Receiver sensitivity plus 3 dB
B	The opposite of fade margin
C	Transmit power minus receiver sensitivity
D	The difference between received power level and minimum required signal level at the input to the receiver

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To prevent overmodulation
B	To allow time for the other station to break in during a transmission
C	To aid in tuning your transmitter
D	Some modes have high duty cycles that could exceed the transmitter’s average power rating

31. - G8C10

How does forward error correction (FEC) allow the receiver to correct data errors?

Select	Answer
A	By using the Varicode character set
B	By transmitting redundant information with the data
C	By using a parity bit with each character
D	By controlling transmitter output power for optimum signal strength

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The feed line must be an odd number of electrical quarter wavelengths long
B	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
C	The antenna feed point must be at DC ground potential
D	The feed line must be an even number of physical half wavelengths long

33. - G9B11

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

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

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 1.5 dB higher
B	Approximately 9 dB higher
C	Approximately 6 dB higher
D	Approximately 3 dB higher

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
B	A vertical dipole placed at approximately 1/2 wavelength above the ground
C	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
D	A horizontal dipole placed at approximately 1/2 wavelength above the ground