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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Make sure that MPE limits are not exceeded in occupied areas
C	Make sure the antenna is properly shielded
D	Locate the antenna close to your operating position to minimize feed-line radiation

2. - G0B12

What is the purpose of a power supply interlock?

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

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	17 meters
B	12 meters
C	160 meters
D	30 meters

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	All these choices are correct
C	Regular transmissions offering equipment for sale, if intended for amateur radio use
D	Transmissions to assist with learning the International Morse code

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Obtain an experimental license from the FCC
B	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
C	Type-certify equipment to FCC standards
D	Publicly document the technical characteristics of the protocol

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must hold an FCC granted amateur radio license of General class or above
B	The person must be a resident of the US for a minimum of 5 years
C	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
D	The person’s home citizenship must be in ITU region 2

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 relate to emergencies or disaster relief
B	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
C	They must be for other licensed amateurs
D	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

Select	Answer
A	Suppressed sideband
B	Lower sideband
C	Double sideband
D	Upper sideband

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

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	The FCC requires a log of all international third-party traffic
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information about your station

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 FM repeater coverage in remote areas
D	To provide DX spotting reports to aid contesters and DXers

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Reduce long delayed echoes
B	Creates auroras that can reflect VHF signals
C	Increases signal strength for HF signals passing through the polar regions
D	Improve HF long path propagation

14. - G3B04

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

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

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Ground waves are absorbing much of the signal
B	The E region is not present
C	Energy is scattered into the skip zone through several different paths
D	The ionospheric region involved is unstable

16. - G4A03

How does a noise blanker work?

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

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	All these choices are correct
B	Generation of harmonics which interfere with frequency readings
C	Received power that interferes with SWR readings
D	Desensitization which can cause intermodulation products which interfere with impedance readings

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	A steady hum whenever the transmitter is on the air
B	Clearly audible speech
C	On-and-off humming or clicking
D	Distorted speech

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Distorted speech
B	Excessive background noise
C	All these choices are correct
D	Excess intermodulation products

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ground the solar panel outer metal framework
B	A series resistor must be in place
C	The solar panel must have a charge controller
D	Ensure the battery is placed terminals-up

21. - G5A03

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

Select	Answer
A	Reluctance
B	Reactance
C	Admittance
D	Conductance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	625 watts
B	5000 watts
C	2500 watts
D	8.75 watts

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	75 ohms
B	67 ohms
C	150 ohms
D	300 ohms

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	High stability
B	High capacitance for given volume
C	Comparatively low cost
D	Tight tolerance

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	MMIC
C	Programmable Logic
D	Digital

26. - G7A11

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

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

27. - G7B11

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

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

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Minimum detectible signal level is reduced
B	Automatic conversion of the signal from digital to analog
C	The need for high resolution analog-to-digital converters is eliminated
D	All types of modulation can be created with appropriate processing

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 modulation
B	Phase transformation
C	Phase convolution
D	Phase inversion

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Odd-order
B	Intercept point
C	Second harmonics
D	Even-order

31. - G8C04

Which of the following describes Baudot code?

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

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	2:1
B	1:5
C	5:1
D	1:2

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower radiation resistance
B	Lower feed point impedance
C	Lower ground losses
D	Shorter radials

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Front-to-back ratio decreases
B	Resonant frequency is lower
C	Gain increases
D	Beamwidth increases

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To prevent out-of-band operation
B	To enable multiband operation
C	To notch spurious frequencies
D	To provide balanced feed point impedance

Figure G7-1