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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	All these choices are correct
B	File an Environmental Impact Statement (EIS-97) with the FCC
C	Take action to prevent human exposure to the excessive RF fields
D	Secure written permission from your neighbors to operate above the controlled MPE limits

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 12
B	AWG number 20
C	AWG number 8
D	AWG number 16

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations may use the band only during emergencies
C	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	No more than one beacon station may transmit in the same band from the same station location
B	The frequency must be posted on the internet or published in a national periodical
C	All these choices are correct
D	The frequency must be coordinated with the National Beacon Organization

5. - G1C10

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

Select	Answer
A	56 kilobaud
B	300 baud
C	19.6 kilobaud
D	1200 baud

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	30 days
C	180 days
D	365 days

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	Channels 1 through 4
B	Channels 42 through 45
C	Anywhere in the band
D	No part

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	The received signal is more natural sounding
B	It provides more power output
C	It allows “hands free” operation
D	It occupies less bandwidth

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 Hz to 50 Hz
B	3 kHz to 6 kHz
C	150 Hz to 500 Hz
D	1 kHz to 3 kHz

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To follow standard radiogram structure
B	To be sure the contact will count for award programs
C	To allow each station to operate according to conditions
D	To allow each station to calibrate their frequency display

12. - G2E02

What is VARA?

Select	Answer
A	A DX spotting system using a network of software defined radios
B	A digital protocol used with Winlink
C	A low signal-to-noise digital mode used for EME (moonbounce)
D	A radio direction finding system used on VHF and UHF

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	The position of the Moon in its orbit
B	Long term oscillations in the upper atmosphere
C	Cyclic variation in Earth’s radiation belts
D	Rotation of the Sun’s surface layers around its axis

14. - G3B11

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

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

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. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A pronounced dip
B	A pronounced peak
C	A slow, rhythmic oscillation
D	No change will be observed

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Generation of harmonics which interfere with frequency readings
B	All these choices are correct
C	Received power that interferes with SWR readings
D	Desensitization which can cause intermodulation products which interfere with impedance readings

18. - G4C09

How can the effects of ground loops be minimized?

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.175 MHz to 7.178 MHz
B	7.178 MHz to 7.184 MHz
C	7.178 MHz to 7.181 MHz
D	7.1765 MHz to 7.1795 MHz

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ground the solar panel outer metal framework
B	The solar panel must have a charge controller
C	A series resistor must be in place
D	Ensure the battery is placed terminals-up

21. - G5A02

What is reactance?

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

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	400 watts
B	353.5 watts
C	100 watts
D	1.4 watts

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	17 ohms
C	80 ohms
D	0.17 ohms

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	Comparatively low cost
C	High capacitance for given volume
D	High stability

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	It converts common-mode current to differential mode current
C	Ferrites expel magnetic fields
D	By creating an out-of-phase current to cancel the common-mode current

26. - G7A03

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

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

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. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Modulation
B	Detection
C	Filtering
D	All these choices are correct

29. - G8A14

What is link margin?

Select	Answer
A	Transmit power minus receiver sensitivity
B	The opposite of fade margin
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. - 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	8 kHz
D	3 kHz

31. - G8C01

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

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

32. - G9A10

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

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

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 peaks at about 1/8 wavelength from the end
B	It steadily decreases
C	It steadily increases
D	It is unaffected by the location of the feed point

34. - G9C05

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

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

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Inverted V
B	Lazy H
C	Inverted L
D	Sloper