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

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the ground wire
B	All wires
C	Only the neutral wire
D	Only the hot wires

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

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	Only “Q” signals are permitted
B	They are limited to those expressly listed in Part 97 of the FCC rules
C	They are not permitted
D	They may be used if they do not obscure the meaning of a message

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	200 watts PEP output
C	1500 watts PEP output
D	50 watts PEP output

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	A US operator/primary station license
B	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
C	Only an appropriate US operator/primary license and a special remote station permit from the FCC
D	A license from the foreign country and a special remote station permit from the FCC

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	100 milliwatts
B	10 watts
C	1500 watts
D	100 watts

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single phase modulation
B	Single sideband
C	Double sideband
D	Frequency modulation

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	Approximately 6 kHz
B	150 Hz to 500 Hz
C	2 kHz to 3 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	“Will you keep the frequency clear?”
C	“Are you busy?” or “Is this frequency in use?”
D	“Are you operating full break-in?” or “Can you operate full break-in?”

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Identify your station according to normal FCC regulations
B	Send a QSL card to the stations worked, or QSL via Logbook of The World
C	Submit a log to the contest sponsor
D	All these choices are correct

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	170 Hz
B	85 Hz
C	425 Hz
D	850 Hz

13. - G3A07

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

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

14. - G3B04

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

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

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of temperature inversions
B	Because it is the densest
C	Because it is the highest
D	Because of the Doppler effect

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By reducing receiver gain during a noise pulse
B	By clipping noise peaks
C	By temporarily increasing received bandwidth
D	By redirecting noise pulses into a filter capacitor

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

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

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	You receive reports of “hum” on your station’s transmitted signal
C	The SWR reading for one or more antennas is suddenly very high
D	You receive reports of harmonic interference from your station

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 3 kHz below the edge of the band
B	At least 1 kHz above the edge of the segment
C	At least 3 kHz above the edge of the band
D	At least 1 kHz below the edge of the segment

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket is not wired with an RF-shielded power cable
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	The DC polarity of the socket is reversed from the polarity of modern HF transceivers

21. - G5A03

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

Select	Answer
A	Reactance
B	Conductance
C	Reluctance
D	Admittance

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

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	300 microfarads
B	33.3 microfarads
C	0.33 microfarads
D	3.0 microfarads

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Screen grid
B	Suppressor grid
C	Control grid
D	Trigger electrode

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Programmable Logic
C	Digital
D	MMIC

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	Only one diode is required
B	More current can be drawn from the half-wave rectifier
C	The ripple frequency is twice that of a full-wave rectifier
D	The output voltage is two times the peak input voltage

27. - G7B06

What is a shift register?

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

28. - G7C01

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

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

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase transformation
B	Phase inversion
C	Phase convolution
D	Phase modulation

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Beat frequency oscillator
B	Image frequency
C	Local oscillator
D	RF input

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Viterbi
B	Varicode
C	Binary
D	Volumetric

32. - G9A03

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

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

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	132 feet
C	84 feet
D	42 feet

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The relative position of the driven element with respect to the reflectors and directors
C	The number of directors versus the number of reflectors
D	The power radiated in the major lobe compared to that in the opposite direction

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