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	File an Environmental Impact Statement (EIS-97) with the FCC
C	Secure written permission from your neighbors to operate above the controlled MPE limits
D	All these choices are correct

2. - G0B11

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

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

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. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	No more than one beacon station may transmit in the same band from the same station location
B	All these choices are correct
C	The frequency must be posted on the internet or published in a national periodical
D	The frequency must be coordinated with the National Beacon Organization

5. - G1C10

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

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

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

7. - G1E06

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

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

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

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

9. - G2B03

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

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

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Transmitting stations can receive between code characters and elements
B	An operator must activate a manual send/receive switch before and after every transmission
C	Breaking stations send the Morse code prosign “BK”
D	Automatic keyers, instead of hand keys, are used to send Morse code

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	America, Boston, Canada, Denmark
B	Able, Baker, Charlie, Dog
C	Adam, Boy, Charles, David
D	Alpha, Bravo, Charlie, Delta

12. - G2E08

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

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

13. - G3A13

What does the A-index measure?

Select	Answer
A	The amount of polarization of the Sun’s electric field
B	The relative position of sunspots on the surface of the Sun
C	The solar radio flux at Boulder, Colorado
D	The long-term stability of Earth’s geomagnetic field

14. - G3B10

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?

Select	Answer
A	180 miles
B	1,200 miles
C	2,500 miles
D	12,000 miles

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Phone signals have high intelligibility
B	Scatter propagation occurs only at night
C	Signals have a fluttering sound
D	There are very large, sudden swings in signal strength

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

17. - G4B12

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

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

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Bonding all equipment enclosures together
B	Using surge suppressor power outlets
C	Placing low-pass filters on all feed lines
D	Building all equipment in a metal enclosure

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	6 dB
B	18 dB
C	15 dB
D	12 dB

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent discharge of the battery through the panel during times of low or no illumination
B	To prevent overload by regulating the charging voltage
C	To limit the current flowing from the panel to a safe value
D	To prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Y
B	B
C	X
D	Z

22. - G5B14

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

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

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	14.3 microfarads
D	0.07 microfarads

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Control grid
B	Trigger electrode
C	Screen grid
D	Suppressor grid

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Low power consumption
B	Better suited for power supply regulation
C	High power handling capability
D	Better suited for RF amplification

26. - G7A05

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

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

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high only when both inputs are high
B	Output is low only when both inputs are high
C	Output is high when either or both inputs are low
D	Output is low when either or both inputs are high

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Image and harmonic
B	Cutoff and rolloff
C	Upper and lower half-power
D	Pole and zero

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By keying an FM transmitter with a sub-audible tone
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By changing an oscillator’s frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

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	Mixer interference
C	Intermediate interference
D	Image response

31. - G8C11

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

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

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation follows Marconi’s Law of Attenuation
B	Attenuation decreases
C	Attenuation is independent of frequency
D	Attenuation increases

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	132 feet
C	42 feet
D	84 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	They are all the same length
B	Relative length depends on the frequency of operation
C	The reflector is shorter, and the director is longer
D	The reflector is longer, and the director is shorter

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To prevent out-of-band operation
C	To enable multiband operation
D	To provide balanced feed point impedance