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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It heats body tissue
B	It cools body tissue
C	It causes radiation poisoning
D	It causes the blood count to reach a dangerously low level

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. - 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	21300 kHz
D	14250 kHz

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	All these choices are correct
C	The frequency must be coordinated with the National Beacon Organization
D	No more than one beacon station may transmit in the same band from the same station location

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	200 watts PEP output
B	1500 watts PEP output
C	1200 watts PEP output
D	1000 watts PEP output

6. - G1D10

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

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

7. - G1E11

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

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

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

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Identify your station by transmitting your call sign at least 3 times
B	All these choices are correct
C	Listen on the frequency for at least two minutes to be sure it is clear
D	Follow the voluntary band plan

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	I am quitting for the day
B	You are sending too fast
C	There is interference on the frequency
D	I am ready to receive

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct amateur licensing examinations
B	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
C	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
D	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

12. - G2E08

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

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

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	15 hours to several days
B	14 days
C	28 days
D	4 to 8 minutes

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Send a series of dots and listen for echoes
B	All these choices are correct
C	Check the A-index
D	Use a network of automated receiving stations on the internet to see where your transmissions are being received

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The frequency at which the signal-to-noise ratio is 6 dB
B	The lowest frequency which is refracted back to Earth
C	The highest frequency which is refracted back to Earth
D	The frequency at which the signal-to-noise ratio approaches unity

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Reduce the SWR in the feed line to the antenna
B	Increase power transfer from the transmitter to the feed line
C	All these choices are correct
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B10

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

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

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Bond equipment enclosures together
B	Avoid using lock washers and star washers when making ground connections
C	Connect the AC neutral conductor to the ground wire
D	Connect all ground conductors in series

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Distorted speech
B	All these choices are correct
C	Excessive background noise
D	Excess intermodulation products

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To limit the current flowing from the panel to a safe value
B	To prevent overload by regulating the charging voltage
C	To prevent discharge of the battery through the panel during times of low or no illumination
D	To prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Resonance causes impedance to be very low
B	Impedance is equal to the arithmetic mean of the inductance and capacitance
C	Resonance causes impedance to be very high
D	Impedance is equal to the geometric mean of the inductance and capacitance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	25.9 percent
B	20.6 percent
C	12.2 percent
D	10.9 percent

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	5.9 ohms
B	0.17 ohms
C	80 ohms
D	17 ohms

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Mode Modulated Integrated Circuit
B	Multi-Mode Integrated Circuit
C	Metal Monolayer Integrated Circuit
D	Monolithic Microwave Integrated Circuit

26. - G7A11

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

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

27. - G7B06

What is a shift register?

Select	Answer
A	An analog mixer
B	A digital mixer
C	An array of operational amplifiers used for tri-state arithmetic operations
D	A clocked array of circuits that passes data in steps along the array

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	Carrier oscillator
C	IF amplifier
D	RF amplifier

29. - G8A05

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

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

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is half the symbol rate
B	Lower symbol rates require wider bandwidth
C	Higher symbol rates require wider bandwidth
D	Symbol rate and bandwidth are not related

31. - G8C16

Which of the following provide digital voice modes?

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

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	5:1
B	1:1
C	Between 1:1 and 5:1 depending on the characteristic impedance of the line
D	Between 1:1 and 5:1 depending on the reflected power at the transmitter

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	84 feet
C	132 feet
D	42 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 1.5 dB higher
B	Approximately 3 dB higher
C	Approximately 9 dB higher
D	Approximately 6 dB higher

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Portable direction finding at higher HF frequencies
B	Portable direction finding at lower HF frequencies
C	Directional receiving for MF and low HF bands
D	Directional transmitting for low HF bands

Figure G7-1