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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	All these choices are correct
B	By calculation based on computer modeling
C	By measurement of field strength using calibrated equipment
D	By calculation based on FCC OET Bulletin 65

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Current flowing from one or more of the hot wires directly to ground
B	All these choices are correct
C	Overvoltage on the hot wires
D	Current flowing from one or more of the hot wires to the neutral wire

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	18155 kHz
B	24900 kHz
C	14250 kHz
D	21300 kHz

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The ITU
B	The IEEE
C	The FCC
D	The control operator

5. - G1C10

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

Select	Answer
A	19.6 kilobaud
B	1200 baud
C	300 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 license from the foreign country and a special remote station permit from the FCC
B	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	A US operator/primary station license
D	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

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	When messages are not encrypted
B	When messages are encrypted
C	Under no circumstances
D	When under automatic control

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Very high-fidelity voice modulation
B	Less bandwidth used and greater power efficiency
C	Less subject to interference from atmospheric static crashes
D	Ease of tuning on receive and immunity to impulse noise

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Have a backup frequency in case of interference or poor conditions
B	Always use multiple sets of phonetics during check-in
C	Transmit the full net roster at the beginning of every session
D	All these choices are correct

10. - G2C03

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

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

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
B	All these choices are correct
C	Compare vertical and horizontal signal strengths on the input frequency
D	Compare signal strengths between the input and output of the repeater

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	RJ-45
B	Gateway
C	Terminal Node Controller
D	Printer/Server

13. - G3A13

What does the A-index measure?

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

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Path distance and location
B	Solar radiation and ionospheric disturbances
C	Time of day and season
D	All these choices are correct

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. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received frequency may become unstable
B	Received signals may become distorted
C	CW signals may become severely attenuated
D	Received frequency may shift several kHz

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Antenna front-to-back ratio
B	Standing wave ratio
C	Radio wave propagation
D	RF interference

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

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

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 above 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 below the edge of the segment

20. - G4E01

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

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

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and voltage
B	The product of current and reactance
C	The ratio of current to voltage
D	The ratio of voltage to current

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 11 milliwatts
B	Approximately 61 milliwatts
C	Approximately 61 watts
D	Approximately 11 watts

23. - G5C07

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

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

24. - G6A10

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

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 7
C	Symbol 11
D	Symbol 1

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	All these choices are correct
B	AM
C	FM
D	SSB

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier gain
B	All these choices are correct
C	Demodulator stage bandwidth
D	Input amplifier noise figure

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Power modulation
D	Amplitude modulation

30. - G8B13

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

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

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	Entire file received correctly
C	Receiving station connected and ready for transmissions
D	Packet was received without error

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	450 ohms
B	75 ohms
C	50 ohms
D	100 ohms

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 increases
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 decreases

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
B	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
C	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

Select	Answer
A	Broadside to the loop
B	Broadside and in the plane of the loop
C	Electrically small loops are omnidirectional
D	In the plane of the loop

Figure G7-1