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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	Secure written permission from your neighbors to operate above the controlled MPE limits
B	File an Environmental Impact Statement (EIS-97) with the FCC
C	Take action to prevent human exposure to the excessive RF fields
D	All these choices are correct

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	Next to the closest power pole
B	Parallel to the water supply line
C	Outside the building
D	As close to the station equipment as possible

3. - G1A08

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

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	On any frequency if power is less than 1 watt
B	28.20 MHz to 28.30 MHz
C	21.08 MHz to 21.09 MHz
D	On any frequency if transmissions are in Morse code

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	PEP output from the transmitter
B	RMS output from the transmitter
C	PEP input to the antenna
D	RMS input to the antenna

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	Only an appropriate US operator/primary license and a special remote station permit from the FCC
B	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
C	A US operator/primary station license
D	A license from the foreign country and a special remote station permit from 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	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 relate to emergencies or disaster relief
D	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Attenuator level
B	RF clipping level
C	Transmit audio or microphone gain
D	Antenna inductance or capacitance

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Any control operator when normal communication systems are operational
B	Only a person holding an FCC-issued amateur operator license
C	A person holding an FCC-issued amateur operator license or an appropriate government official
D	Only a RACES net control operator

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Report was read from an S meter rather than estimated
B	Chirpy or unstable signal
C	Key clicks
D	100 percent copy

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Transmit a connect message on the station’s published frequency
B	Send an email to the system control operator
C	Respond when the station broadcasts its SSID
D	Send QRL in Morse code

13. - G3A12

What does the K-index measure?

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

14. - G3B12

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

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

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The F region absorbs signals at these frequencies during daylight hours
B	The E region is unstable during daylight hours
C	The F region is unstable during daylight hours
D	The D region absorbs signals at these frequencies during daylight hours

16. - G4A13

What is the purpose of using a receive attenuator?

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

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	An oscilloscope uses less power
B	Complex waveforms can be measured
C	Complex impedances can be easily measured
D	Greater precision

18. - G4C05

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

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

19. - G4D04

What does an S meter measure?

Select	Answer
A	Transmitter power output
B	Carrier suppression
C	Impedance
D	Received signal strength

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Series-parallel
B	Full-wave bridge
C	Shunt
D	Bypass

21. - G5A02

What is reactance?

Select	Answer
A	Reinforcement of the flow of direct current caused by resistance
B	Opposition to the flow of alternating current caused by capacitance or inductance
C	Opposition to the flow of direct current caused by resistance
D	Reinforcement of the flow of alternating current caused by capacitance or inductance

22. - G5B02

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

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

23. - G5C04

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

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

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	12 volts
B	8.5 volts
C	10.5 volts
D	6 volts

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	180 degrees
B	360 degrees
C	90 degrees
D	270 degrees

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	16
B	8
C	3
D	6

28. - G7C03

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	It is sideband sensitive
B	Its bandwidth is approximately the same as BPSK31
C	All these choices are correct
D	Its encoding provides error correction

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Balanced converter
B	Reactance modulator
C	Mixer
D	Multiplier

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Binary
B	Viterbi
C	Varicode
D	Volumetric

32. - G9A07

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

Select	Answer
A	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
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 feed line must be an even number of physical half wavelengths long

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	42 feet
C	132 feet
D	84 feet

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

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