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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The average time it takes RF radiation to have any long-term effect on the body
B	The total time of the exposure
C	The total RF exposure averaged over a certain period
D	The average amount of power developed by the transmitter over a specific 24-hour period

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Make sure all circuits that supply power to the tower are locked out and tagged
B	Notify the electric company that a person will be working on the tower
C	Unground the base of the tower
D	All these choices are correct

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	28.000 MHz to 28.025 MHz
B	21.275 MHz to 21.300 MHz
C	7.125 MHz to 7.175 MHz
D	All these choices are correct

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The ITU
B	The FCC
C	The IEEE
D	The control operator

5. - G1C08

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

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

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A US operator/primary station license
B	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	A license from the foreign country and a special remote station permit from the FCC
D	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

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

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Contest operations should yield to non-contest use of frequencies
B	QSOs in progress have priority
C	Nets have priority
D	Except during emergencies, no amateur station has priority access to any frequency

10. - G2C06

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

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

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
B	All these choices are correct
C	Compare vertical and horizontal signal strengths on the input frequency
D	Compare signal strengths between the input and output of the repeater

12. - G2E09

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

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

13. - G3A12

What does the K-index measure?

Select	Answer
A	The short-term stability of the Sun’s magnetic field
B	The short-term stability of Earth’s geomagnetic field
C	The solar radio flux at Boulder, Colorado
D	The relative position of sunspots on the surface of the Sun

14. - G3B02

What factors affect the MUF?

Select	Answer
A	All these choices are correct
B	Solar radiation and ionospheric disturbances
C	Path distance and location
D	Time of day and season

15. - G3C11

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

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

16. - G4A05

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

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

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	A field strength meter
B	An oscilloscope
C	A wavemeter
D	A sidetone monitor

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Ground the center conductor of the audio cable causing the interference
B	Place a ferrite choke on the cable
C	Add an additional insulating jacket to the cable
D	Connect the center conductor to the shield of all cables to short circuit the RFI signal

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It increases average power
B	It reduces intermodulation distortion
C	It reduces harmonic distortion
D	It increases peak power

20. - G4E09

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

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

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the amplitude of the applied AC increases, the reactance increases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance decreases

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	1.00
B	2.00
C	1.414
D	0.707

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	0.07 microfarads
B	14.3 microfarads
C	1,000 microfarads
D	70 microfarads

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.7 volts
B	1.0 volts
C	0.1 volt
D	0.3 volts

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Programmable Logic
B	MMIC
C	Analog
D	Digital

26. - G7A09

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

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

27. - G7B06

What is a shift register?

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

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Insertion loss
B	Return loss
C	Q
D	Ultimate rejection

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By changing an oscillator’s frequency directly with a digital control signal
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By keying an FM transmitter with a sub-audible tone
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To aid in tuning your transmitter
B	Some modes have high duty cycles that could exceed the transmitter’s average power rating
C	To prevent overmodulation
D	To allow time for the other station to break in during a transmission

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	Dot and dash
B	Mark and space
C	High and low
D	On and off

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	Feeding the antenna with unbalanced feed line
C	Using more transmitter power than the antenna can handle
D	Operating an antenna at its resonant frequency

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It is unaffected by the height above ground
B	It steadily increases
C	It peaks at about 1/8 wavelength above ground
D	It steadily decreases

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	The reflector is longer, and the director is shorter
B	They are all the same length
C	The reflector is shorter, and the director is longer
D	Relative length depends on the frequency of operation

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Inverted L
B	Inverted V
C	Sloper
D	Lazy H

Figure G7-1