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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on computer modeling
B	All these choices are correct
C	By calculation based on FCC OET Bulletin 65
D	By measurement of field strength using calibrated equipment

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Ensure that all heavy tools are securely fastened to the harness
B	Always hold on to the tower with one hand
C	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
D	All these choices are correct

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

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Unidentified test transmissions of less than 10 seconds in duration
B	Transmissions to assist with learning the International Morse code
C	All these choices are correct
D	Regular transmissions offering equipment for sale, if intended for amateur radio use

5. - G1C02

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

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of both the remote station’s country and the FCC
B	Those of the remote station’s country and the FCC’s third-party regulations
C	Only those of the remote station’s country
D	Only those of the FCC

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must be for other licensed amateurs
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	They must relate to emergencies or disaster relief
D	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “QRZ” several times, followed by your call sign
B	Say your call sign once
C	Say “CQ” followed by the call sign of either station
D	Say “Breaker Breaker”

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

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 operating full break-in?” or “Can you operate full break-in?”
D	“Are you busy?” or “Is this frequency in use?”

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Alpha, Bravo, Charlie, Delta
B	America, Boston, Canada, Denmark
C	Adam, Boy, Charles, David
D	Able, Baker, Charlie, Dog

12. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Send a NAK code
C	Transmit a steady carrier until the PACTOR protocol times out and disconnects
D	Joining an existing contact is not possible, PACTOR connections are limited to two stations

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	Only at the minimum point
C	Only at the maximum point
D	At any point

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	World-wide propagation during daylight hours
B	Heavy distortion on signals due to photon absorption
C	High levels of atmospheric noise or static
D	Poor propagation at any time of day

15. - G3C04

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

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

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received frequency may shift several kHz
B	Received signals may become distorted
C	Received frequency may become unstable
D	CW signals may become severely attenuated

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	The transmitter balanced mixer output
C	An external RF oscillator
D	The local oscillator of the transmitter

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	Solder flux will prevent a low conductivity connection
C	Solder has too high a dielectric constant to provide adequate lightning protection
D	All these choices are correct

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 8 times
C	Approximately 1.5 times
D	Approximately 4 times

20. - G4E09

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

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

21. - G5A01

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

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

22. - G5B10

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

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

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	120 volts
B	25.5 volts
C	40 volts
D	360 volts

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	High voltage
B	Long life
C	High discharge current
D	Rapid recharge

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Forward biased
B	At the Zener voltage
C	Reverse biased
D	In the tunnel-effect region

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Inherently more stable
B	High-frequency operation allows the use of smaller components
C	Fewer circuit components are required
D	Faster switching time makes higher output voltage possible

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	Any RF power amplifier used in conjunction with an amateur transceiver
B	An amplifier in which the output preserves the input waveform
C	A Class C high efficiency amplifier
D	An amplifier used as a frequency multiplier

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize transmitter power output
B	To present the desired impedance to the transmitter and feed line
C	To minimize radiation resistance
D	To reduce power supply ripple

29. - G8A05

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

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

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using SELCAL and LISTEN
B	A 7-bit code with start, stop, and parity bits
C	A code using error detection and correction
D	A 5-bit code with additional start and stop bits

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The feed line must be an even number of physical half wavelengths long
B	The feed line must be an odd number of electrical quarter wavelengths long
C	The antenna feed point must be at DC ground potential
D	The antenna feed point impedance must be matched to the characteristic impedance of the feed line

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. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	3/4 wavelength
B	1 wavelength
C	1/2 wavelength
D	1/4 wavelength

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Harmonic suppression
B	Wide bandwidth
C	Higher gain per element than a Yagi antenna
D	Polarization diversity