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. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

Select	Answer
A	Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
B	Post a copy of FCC Part 97.13 in the station
C	Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels
D	All these choices are correct

2. - G0B07

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

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

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	20 meters
B	12 meters
C	30 meters
D	160 meters

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Automatic identification of repeaters
C	Transmission of bulletins of general interest to amateur radio licensees
D	All these choices are correct

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. - G1D12

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

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

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	No third-party traffic may be transmitted
B	The control operator of the interrogating station must hold an Amateur Extra class license
C	The station initiating the contact must be under local or remote control
D	The interrogating transmission must be made by another automatically controlled station

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Less subject to interference from atmospheric static crashes
B	Very high-fidelity voice modulation
C	Ease of tuning on receive and immunity to impulse noise
D	Less bandwidth used and greater power efficiency

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per week
B	No more than 1 hour per month
C	No more than 2 hours per week
D	No more than 2 hours per month

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows true bearings and distances from a specific location
C	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
D	A map that shows accurate land masses

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide real time propagation data by monitoring amateur radio transmissions worldwide
B	To provide high-speed data services during an emergency or community event
C	To provide DX spotting reports to aid contesters and DXers
D	To provide FM repeater coverage in remote areas

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is disturbed
B	VHF/UHF ducting is disturbed
C	VHF/UHF ducting is improved
D	HF communication is improved

14. - G3B03

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

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

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 frequency at which the signal-to-noise ratio approaches unity
C	The highest frequency which is refracted back to Earth
D	The lowest frequency which is refracted back to Earth

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To prevent receiver overload from strong incoming signals
B	To reduce excessive audio level on strong signals
C	To reduce the transmitter power when driving a linear amplifier
D	To reduce power consumption when operating from batteries

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It allows for higher voltages to be safely measured
B	It decreases the loading on circuits being measured
C	It improves the resolution of the readings
D	It improves the frequency response

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	Connect the AC neutral conductor to the ground wire
D	Bond equipment enclosures together

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 4 times
B	Approximately 1.5 times
C	Approximately 8 times
D	Approximately 2 times

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

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	The circuit radiates all its energy in the form of radio waves
B	Resistance is cancelled
C	Current and voltage are equal
D	Inductive reactance and capacitive reactance cancel

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	692 volts
B	245 volts
C	173 volts
D	346 volts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	17 ohms
B	80 ohms
C	0.17 ohms
D	5.9 ohms

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is formed by depositing metal on silicon
B	The gate is separated from the channel by a thin insulating layer
C	The source is separated from the drain by a thin insulating layer
D	The gate is formed by a back-biased junction

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	The magnetic properties of the core may be optimized for a specific range of frequencies
B	Most of the magnetic field is contained in the core
C	All these choices are correct
D	Large values of inductance may be obtained

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 1
C	Symbol 7
D	Symbol 11

27. - G7B06

What is a shift register?

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

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Notch frequency
B	Neper frequency
C	Cutoff frequency
D	Rolloff frequency

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Frequency drift
B	Excessive bandwidth
C	Insufficient audio
D	Insufficient bandwidth

30. - G8B09

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

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

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	DMR, D-STAR, and SystemFusion
B	WSPR, MFSK16, and EasyPAL
C	FT8, FT4, and FST4
D	Winlink, PACTOR II, and PACTOR III

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss increases the accuracy of SWR measured at the input to the line
B	Transmission line loss does not affect the SWR measurement
C	Higher loss increases SWR measured at the input to the line
D	Higher loss reduces SWR measured at the input to the line

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
B	Antenna height has no effect on the pattern
C	If the antenna is too high, the pattern becomes unpredictable
D	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB lower
B	Gain in dBd is 1.25 dBd lower
C	Gain in dBd is 1.25 dBd higher
D	Gain in dBi is 2.15 dB higher

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

Figure G7-1