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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	All commercial stations; amateur radio stations are exempt
B	Only stations transmitting more than 500 watts PEP
C	All stations with a time-averaged transmission of more than one milliwatt
D	Only stations with antennas lower than one wavelength above the ground

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut down the unit if it becomes too hot
B	To ensure that dangerous voltages are removed if the cabinet is opened
C	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
D	To shut off the power supply if too much voltage is produced

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	80 meters, 40 meters, 20 meters, and 15 meters
B	All HF bands except 160 meters and 10 meters
C	60 meters, 30 meters, 17 meters, and 12 meters
D	All HF bands

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country has a formal third-party agreement filed with the FCC
B	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
C	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
D	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Technician only
B	General and Technician
C	None, only Amateur Extra class licensees may be accredited
D	Amateur Extra, General, and Technician

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are not encrypted
B	When under automatic control
C	When messages are encrypted
D	Under no circumstances

8. - G2A10

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

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

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
B	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
C	Listen for 2 minutes before calling CQ
D	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	Send slower
B	I have received and understood
C	We have worked before
D	We have already confirmed the contact

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 allow each station to operate according to conditions
C	To be sure the contact will count for award programs
D	To allow each station to calibrate their frequency display

12. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	Computer time accurate to within approximately 1 second
B	A special hardware modem
C	Receiver attenuator set to -12 dB
D	A vertically polarized antenna

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of solar radiation with a wavelength of 10.7 centimeters
B	A count of sunspots that is adjusted for solar emissions
C	Another name for the American sunspot number
D	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted and trapped in the ionosphere to circle Earth
B	They pass through the ionosphere
C	They are attenuated before reaching the destination
D	They are refracted back to Earth

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The long path azimuth of a distant station
C	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The short path azimuth of a distant station

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	Computer interface for PSK and RTTY operation
B	To allow time for switching the antenna from the receiver to the transmitter
C	Automatic transmit/receive switching
D	Automatic generation of dots and dashes for CW operation

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The attenuated RF output of the transmitter
B	An external RF oscillator
C	The local oscillator of the transmitter
D	The transmitter balanced mixer output

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground rod is resonant
B	Flat braid rather than round wire has been used for the ground wire
C	The ground wire has high impedance on that frequency
D	Insulated wire has been used for the ground wire

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

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the alternator or generator using insulated heavy duty balanced transmission line
B	To the battery using insulated heavy duty balanced transmission line
C	To the alternator or generator using heavy-gauge wire
D	To the battery using heavy-gauge wire

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Reluctance
B	Conductance
C	Admittance
D	Susceptance

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It equals the sum of the currents through each branch
B	It is the sum of the reciprocal of each individual voltage drop
C	It equals the average of the branch currents
D	It decreases as more parallel branches are added to the circuit

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	70 millihenries
B	7 millihenries
C	1,000 millihenries
D	14.3 millihenries

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	The active region (between cutoff and saturation)
B	Saturation and cutoff
C	Peak and valley current points
D	Enhancement and depletion modes

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	MMIC
B	Digital
C	Programmable Logic
D	Analog

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 5
B	Symbol 4
C	Symbol 2
D	Symbol 1

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	SSB
B	All these choices are correct
C	FM
D	AM

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	Zero
B	180 degrees
C	45 degrees
D	90 degrees

29. - G8A04

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

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

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	5 kHz
B	416.7 Hz
C	60 kHz
D	101.75 Hz

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	MFSK32
C	MSK144
D	FT8

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	A difference between feed line impedance and antenna feed point impedance
B	Operating an antenna at its resonant frequency
C	Using more transmitter power than the antenna can handle
D	Feeding the antenna with unbalanced feed line

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	8 feet
B	33 feet
C	16 feet
D	24 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 power radiated in the major lobe compared to that in the opposite direction
C	The relative position of the driven element with respect to the reflectors and directors
D	The number of directors versus the number of reflectors

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They must be used with an antenna tuner
B	They have poor harmonic rejection
C	They present low impedance on all design frequencies
D	They must be fed with open wire line

Figure G7-1