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	Position the antenna along the edge of a wall to reduce parasitic radiation
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Make sure the antenna is properly shielded

2. - G0B07

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

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

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

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

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	All these choices are correct
B	No more than one beacon station may transmit in the same band from the same station location
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. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third-party traffic
B	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	You must keep a record of the date, time, frequency, power level, and stations worked

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least two Volunteer Examiners of Technician class or higher
B	At least three Volunteer Examiners of Technician class
C	At least two Volunteer Examiners of General class or higher
D	At least three Volunteer Examiners of General class or higher

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All these choices are correct
B	When operating within one mile of an FCC Monitoring Station
C	When a station is transmitting spread spectrum emissions
D	When using a band where the Amateur Service is secondary

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

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

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Are you listening only for a specific station?”
B	“Are you operating full break-in?” or “Can you operate full break-in?”
C	“Will you keep the frequency clear?”
D	“Are you busy?” or “Is this frequency in use?”

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Toward the north
B	Toward the rising sun
C	180 degrees from the station’s short-path heading
D	Along the gray line

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Approximately 14.074 MHz to 14.077 MHz
B	Approximately 14.110 MHz to 14.113 MHz
C	Anywhere in the CW portion of the band
D	Anywhere in the voice portion of the band

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 long-term stability of Earth’s geomagnetic field
D	The relative position of sunspots on the surface of the Sun

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24-hour period
B	Lowest Usable Frequency during the past 60 minutes
C	Lowest Usable Frequency for communications to any point outside a 100-mile radius
D	The Lowest Usable Frequency for communications between two specific points

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
C	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The long path azimuth of a distant station

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To reduce harmonic radiation
B	To balance the transmitter audio frequency response
C	To increase overall efficiency
D	To prevent excessive drive

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	Generation of harmonics which interfere with frequency readings
C	All these choices are correct
D	Desensitization which can cause intermodulation products which interfere with impedance readings

18. - G4C11

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

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

19. - G4D02

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

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

20. - G4E02

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

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

21. - G5A08

What is impedance?

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

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 61 watts
B	Approximately 61 milliwatts
C	Approximately 11 watts
D	Approximately 11 milliwatts

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To improve the coupling between the primary and secondary
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
D	To accommodate the higher current of the primary

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is formed by a back-biased junction
B	The gate is separated from the channel by a thin insulating layer
C	The source is formed by depositing metal on silicon
D	The source is separated from the drain by a thin insulating layer

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	40 GHz
B	4 GHz
C	500 MHz
D	50 MHz

26. - G7A10

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

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

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 high when either or both inputs are low
C	Output is low only when both inputs are high
D	Output is low when either or both inputs are high

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Rolloff
B	Insertion loss
C	Notch depth
D	Ultimate rejection

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Frequency modulation
B	Phase modulation
C	Vestigial sideband
D	Single sideband

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Frequency inversion
B	Heterodyning
C	Synthesizing
D	Phase inversion

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	WSPR, MFSK16, and EasyPAL
B	DMR, D-STAR, and SystemFusion
C	Winlink, PACTOR II, and PACTOR III
D	FT8, FT4, and FST4

32. - G9A11

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

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

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	Antenna height has no effect on the pattern
B	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
C	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
D	If the antenna is too high, the pattern becomes unpredictable

34. - G9C11

What is a beta or hairpin match?

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

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	Omnidirectional in the plane of the halo
B	Broadside to the plane of the halo
C	On the same side as the feed point
D	Opposite the feed point

Figure G7-1