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. - G0A06

What must you do if your station fails to meet the FCC RF exposure exemption criteria?

Select	Answer
A	Use an FCC-approved band-pass filter
B	Contact the FCC for permission to transmit
C	Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
D	Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
B	To ensure that dangerous voltages are removed if the cabinet is opened
C	To shut off the power supply if too much voltage is produced
D	To shut down the unit if it becomes too hot

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	7.125 MHz to 7.175 MHz
B	21.275 MHz to 21.300 MHz
C	All these choices are correct
D	28.000 MHz to 28.025 MHz

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be posted on the internet or published in a national periodical
B	No more than one beacon station may transmit in the same band from the same station location
C	All these choices are correct
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	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
B	You must keep a record of the manufacturer of your equipment and the antenna used
C	You must keep a record of all third-party traffic
D	You must keep a record of the date, time, frequency, power level, and stations worked

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	Only an appropriate US operator/primary license and a special remote station permit from the FCC
B	A US operator/primary station license
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. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	On any band segment where digital operation is permitted
B	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands
C	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
D	Only in the non-phone Extra Class segments of the bands

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Any stations outside the lower 48 states
B	Any caller is welcome to respond
C	Only contest stations
D	Only stations in Germany

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Nets have priority
B	QSOs in progress have priority
C	Contest operations should yield to non-contest use of frequencies
D	Except during emergencies, no amateur station has priority access to any frequency

10. - G2C03

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

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

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
B	A map that shows the angle at which an amateur satellite crosses the equator
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	Frequent retries or timeouts
B	Long pauses in message transmission
C	Failure to establish a connection between stations
D	All these choices are correct

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of solar radiation with a wavelength of 10.7 centimeters
B	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
C	Another name for the American sunspot number
D	A count of sunspots that is adjusted for solar emissions

14. - G3B05

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

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

15. - G3C06

What is a characteristic of HF scatter?

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

16. - G4A13

What is the purpose of using a receive attenuator?

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

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When high precision is desired
B	When measuring the frequency of an oscillator
C	When adjusting circuits for maximum or minimum values
D	When testing logic circuits

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. - G4D06

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

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

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	Efficiency of the electrically short antenna
B	FCC rules limiting mobile output power on the 75-meter band
C	“Picket fencing”
D	The wire gauge of the DC power line to the transceiver

21. - G5A03

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

Select	Answer
A	Reluctance
B	Admittance
C	Conductance
D	Reactance

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 watts
B	Approximately 61 watts
C	Approximately 61 milliwatts
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 prevent parasitic oscillations due to resistive losses in the primary
B	To accommodate the higher current of the primary
C	To improve the coupling between the primary and secondary
D	To ensure that the volume of the primary winding is equal to the volume of the secondary winding

24. - G6A02

What is an advantage of batteries with low internal resistance?

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	By creating an impedance in the current’s path
B	Ferrites expel magnetic fields
C	By creating an out-of-phase current to cancel the common-mode current
D	It converts common-mode current to differential mode current

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Full-wave
B	Half-wave
C	Synchronous
D	Full-wave bridge

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	16
B	8
C	6
D	3

28. - G7C13

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

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

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	The transmitter’s automatic level control (ALC) is properly adjusted
B	Signal distortion caused by excessive drive or speech levels
C	The transmitter’s carrier is properly suppressed
D	Signal distortion caused by insufficient collector current

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	16 kHz
B	5 kHz
C	3 kHz
D	8 kHz

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Receiving station connected and ready for transmissions
B	Entire file received correctly
C	Request retransmission of the packet
D	Packet was received without error

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	5:1
B	1:2
C	2:1
D	1:5

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It peaks at about 1/8 wavelength above ground
B	It steadily decreases
C	It is unaffected by the height above ground
D	It steadily increases

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Gain increases
B	Beamwidth increases
C	Resonant frequency is lower
D	Front-to-back ratio decreases

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