US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
B	High duty cycle transmitters are exempt from RF exposure requirements
C	A higher duty cycle permits greater power levels to be transmitted
D	A lower duty cycle permits greater power levels to be transmitted

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	On the antenna, opposite the feed point
B	In series with each ground lead
C	At the closest power pole ground electrode
D	Where the feed lines enter the building

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.025 MHz to 28.300 MHz only
B	28.000 MHz to 28.300 MHz only
C	The entire band
D	28.000 MHz to 28.025 MHz only

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Automatic identification of repeaters
C	Transmission of bulletins of general interest to amateur radio licensees
D	All these choices are correct

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Type-certify equipment to FCC standards
B	Obtain an experimental license from the FCC
C	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
D	Publicly document the technical characteristics of the protocol

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	There is no age limit
B	16 years
C	21 years
D	18 years

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is not a US citizen
B	The third party’s amateur license has been revoked and not reinstated
C	The third party is speaking in a language other than English
D	All these choices are correct

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Only a RACES net control operator
B	Any control operator when normal communication systems are operational
C	A person holding an FCC-issued amateur operator license or an appropriate government official
D	Only a person holding an FCC-issued amateur operator license

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Sending without error
B	Operating split to avoid interference on frequency
C	Matching the transmit frequency to the frequency of a received signal
D	Matching the speed of the transmitting station

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

12. - G2E08

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

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

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	Only at the maximum point
B	Only at the minimum point
C	At any point
D	At the summer solstice

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Double-hop propagation along the path is more common
C	Propagation via ordinary skywave communications is not possible over that path
D	Propagation over the path on all HF frequencies is enhanced

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Propagation is via ducts in the F region, which absorb most of the energy
C	Only a small part of the signal energy is scattered into the skip zone
D	Signals are scattered from the magnetosphere, which is not a good reflector

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	ALC will invert the modulation of the AFSK mode
B	The ALC action distorts the signal
C	All these choices are correct
D	When using digital modes, too much ALC activity can cause the transmitter to overheat

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It decreases the loading on circuits being measured
B	It improves the resolution of the readings
C	It improves the frequency response
D	It allows for higher voltages to be safely measured

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	Solder flux will prevent a low conductivity connection
D	All these choices are correct

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 100 times more powerful
B	It is 20 times more powerful
C	It is 10 times less powerful
D	It is 20 times less powerful

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Shunt
B	Series-parallel
C	Bypass
D	Full-wave bridge

21. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of direct current caused by resistance
B	Reinforcement of the flow of direct current caused by resistance
C	Reinforcement of the flow of alternating current caused by capacitance or inductance
D	Opposition to the flow of alternating current caused by capacitance or inductance

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 9 dB
B	Approximately 6 dB
C	Approximately 2 dB
D	Approximately 3 dB

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	576.9 nanofarads
B	3,583 picofarads
C	10.750 nanofarads
D	1,733 picofarads

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	0.7 volts
B	0.3 volts
C	1.0 volts
D	0.1 volt

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	PL-259
B	RCA Phono
C	BNC
D	Type N

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 1
B	Symbol 4
C	Symbol 6
D	Symbol 7

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input power
B	Add the RF input power to the DC output power
C	Multiply the RF input power by the reciprocal of the RF output power
D	Divide the DC input power by the DC output power

28. - G7C13

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

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

29. - G8A14

What is link margin?

Select	Answer
A	The opposite of fade margin
B	Transmit power minus receiver sensitivity
C	Receiver sensitivity plus 3 dB
D	The difference between received power level and minimum required signal level at the input to the receiver

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It results in the best signal-to-noise ratio
B	It improves impedance matching of the antenna
C	It is required by FCC rules
D	It minimizes power consumption in the receiver

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	432 MHz
B	2.4 GHz
C	10.7 GHz
D	902 MHz

32. - G9A03

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

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

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	11 feet
B	16 feet
C	21 feet
D	8 feet

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 6 dB higher
B	Approximately 3 dB higher
C	Approximately 9 dB higher
D	Approximately 1.5 dB higher

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

Figure G7-1