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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	All these choices are correct
B	Its duty cycle
C	Its frequency
D	Its power density

2. - G0B13

Where should lightning arrestors be located?

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

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The lower frequency portion
B	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz
C	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
D	The upper frequency portion

4. - G1B07

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

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

5. - G1C06

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

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

6. - G1D01

Who may receive partial credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago
B	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
C	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
D	Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	All these choices are correct
C	When a station is transmitting spread spectrum emissions
D	When operating within one mile of an FCC Monitoring Station

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Antenna inductance or capacitance
B	Attenuator level
C	RF clipping level
D	Transmit audio or microphone gain

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only SSTV contacts
B	Only digital contacts
C	Only contacts with other stations within the 48 contiguous states
D	Only contacts with stations not within the 48 contiguous states

10. - G2C06

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

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

11. - G2D01

What is the Volunteer Monitor Program?

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

12. - G2E06

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

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

13. - G3A11

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

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

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just above the LUF
B	Just above the critical frequency
C	Just below the MUF
D	Just below the critical frequency

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The F2 region
B	The F1 region
C	The D region
D	The E region

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To prevent excessive drive
C	To balance the transmitter audio frequency response
D	To reduce harmonic radiation

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Faster response
B	Better for measuring computer circuits
C	Higher precision
D	Less prone to overload

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Forward-biased diode
B	Reverse-biased diode
C	Bypass capacitor
D	Bypass inductor

19. - G4D10

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

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

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.02 VDC
B	1.38 VDC
C	0.5 VDC
D	0.2 VDC

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Admittance
B	Reactance
C	Conductance
D	Reluctance

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak value
B	The peak-to-peak value
C	The RMS value
D	The reciprocal of the RMS value

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	3.3 millihenries
B	30 millihenries
C	0.30 henries
D	3.3 henries

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase efficiency
B	To increase the control grid resistance
C	To decrease plate resistance
D	To reduce grid-to-plate capacitance

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

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It acts as a fuse for excess voltage
B	It removes shock hazards from the induction coils
C	It discharges the filter capacitors when power is removed
D	It eliminates ground loop current

27. - G7B05

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

Select	Answer
A	8
B	3
C	16
D	6

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	Mixing products are greatly reduced
C	The DSP filter is much more effective at VHF frequencies
D	A wide range of filter bandwidths and shapes can be created

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Multiplex modulation
B	Phase modulation
C	Pulse modulation
D	Amplitude modulation

30. - G8B09

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

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

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	AMTOR
B	FT8
C	MSK144
D	MFSK32

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The radius of the conductors and the frequency of the signal
C	The distance between the centers of the conductors and the length of the line
D	The frequency of the signal and the length of the line

33. - G9B02

Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Lengthen the radials beyond one wavelength
B	Slope the radials upward
C	Coil the radials
D	Slope the radials downward

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
B	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
C	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
D	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna

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