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

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	12 meters
B	17 meters
C	160 meters
D	30 meters

4. - G1B06

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

Select	Answer
A	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
B	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
C	Under no circumstances, FCC rules take priority
D	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

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	RMS input to the antenna
B	PEP input to the antenna
C	RMS output from the transmitter
D	PEP output from the transmitter

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of the remote station’s country and the FCC’s third-party regulations
B	Only those of the FCC
C	Those of both the remote station’s country and the FCC
D	Only those of the remote station’s country

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	No third-party traffic may be transmitted
C	The station initiating the contact must be under local or remote control
D	The control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
C	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
D	Only one sideband and the carrier are transmitted; the other sideband is suppressed

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	1 kHz to 3 kHz
B	5 Hz to 50 Hz
C	150 Hz to 500 Hz
D	3 kHz to 6 kHz

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 10 wpm
B	The fastest speed at which you are comfortable copying, but no faster than the CQ
C	The fastest speed at which you are comfortable copying, but no slower than the CQ
D	At the standard calling speed of 5 wpm

11. - G2D05

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

Select	Answer
A	Sign your call sign once, followed by the words “listening for a call” -- 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	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat

12. - G2E12

Which of the following describes Winlink?

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

13. - G3A12

What does the K-index measure?

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are amplified by interaction with the ionosphere
D	They pass through the ionosphere

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because it is the densest
B	Because of temperature inversions
C	Because it is the highest
D	Because of the Doppler effect

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce excessive audio level on strong signals
B	To reduce the transmitter power when driving a linear amplifier
C	To reduce power consumption when operating from batteries
D	To prevent receiver overload from strong incoming signals

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Power output from a transmitter
B	Impedance of coaxial cable
C	Front-to-back ratio of an antenna
D	Gain of a directional antenna

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It ensures that hazardous voltages cannot appear on the chassis
B	It ensures that the neutral wire is grounded
C	It prevents a blown fuse in the event of an internal short circuit
D	It prevents signal overload

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 3 kHz above the edge of the band
B	At least 3 kHz below the edge of the band
C	At least 1 kHz below the edge of the segment
D	At least 1 kHz above the edge of the segment

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The socket’s wiring may be inadequate for the current drawn by the transceiver
B	Drawing more than 50 watts from this socket could cause the engine to overheat
C	The socket is not wired with an RF-shielded power cable
D	The DC polarity of the socket is reversed from the polarity of modern HF transceivers

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Reluctance
C	Admittance
D	Conductance

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.00
C	1.414
D	2.00

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	24 to 1
C	3.5 to 1
D	144 to 1

24. - G6A02

What is an advantage of batteries with low internal resistance?

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

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	High power handling capability
C	Better suited for RF amplification
D	Better suited for power supply regulation

26. - G7A10

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

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

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	A frequency multiplier and a mixer
B	A circulator and a filter operating in a feed-forward loop
C	An amplifier and a divider
D	A filter and an amplifier operating in a feedback loop

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize radiation resistance
B	To reduce power supply ripple
C	To minimize transmitter power output
D	To present the desired impedance to the transmitter and feed line

29. - G8A01

How is direct binary FSK modulation generated?

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

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	2F1-F2
B	All these choices are correct
C	3F1-F2
D	5F1-3F2

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Directory
B	Trailer
C	Preamble
D	Header

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 reduces SWR measured at the input to the line
C	Higher loss increases SWR measured at the input to the line
D	Higher loss increases the accuracy of SWR measured at the input to the line

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It must be longer than 1 wavelength
B	It produces only vertically polarized radiation
C	Station equipment may carry significant RF current
D	It is more effective on the lower HF bands than on the higher bands

34. - G9C07

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

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

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Lazy H
B	Sloper
C	Inverted V
D	Inverted L

Figure G7-1