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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its power density
B	All these choices are correct
C	Its duty cycle
D	Its frequency

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Current flowing from one or more of the hot wires to the neutral wire
B	Current flowing from one or more of the hot wires directly to ground
C	Overvoltage on the hot wires
D	All these choices are correct

3. - G1A02

On which of the following bands is phone operation prohibited?

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

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	100 watts PEP output
B	200 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	ERP of 100 watts PEP with respect to an isotropic antenna
B	ERP of 100 watts PEP with respect to a dipole
C	10 watts RMS
D	1500 watts PEP

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

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Acknowledge the station in distress and determine what assistance may be needed
C	Inform your local emergency coordinator
D	Immediately cease all transmissions

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	Send slower
B	I have received and understood
C	We have already confirmed the contact
D	We have worked before

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

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	All these choices are correct
B	You may be listening on the wrong sideband
C	You may have selected the wrong baud rate
D	The mark and space frequencies may be reversed

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	28 days
B	1 to 2 hours
C	20 to 40 hours
D	8 minutes

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency for communications between two points
B	The Maximum Usable Frequency during a 24-hour period
C	The Minimum Usable Frequency during a 24-hour period
D	The Minimum Usable Frequency for communications between two points

15. - G3C07

What makes HF scatter signals often sound distorted?

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

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

18. - G4C05

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

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

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 100 times more powerful
C	It is 20 times less powerful
D	It is 10 times less powerful

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To electrically lengthen a physically short antenna
B	To reduce radiation resistance
C	To increase the power handling capacity of a whip antenna
D	To lower the radiation angle

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Farad
C	Ampere
D	Siemens

22. - G5B02

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

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

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To accommodate the higher current of the primary
B	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
C	To prevent parasitic oscillations due to resistive losses in the primary
D	To improve the coupling between the primary and secondary

24. - G6A08

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

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

25. - G6B11

What is an SMA connector?

Select	Answer
A	A type of push-on connector intended for high-voltage applications
B	A small threaded connector suitable for signals up to several GHz
C	A type-S to type-M adaptor
D	A connector designed for serial multiple access signals

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	The output voltage is two times the peak input voltage
B	Only one diode is required
C	More current can be drawn from the half-wave rectifier
D	The ripple frequency is twice that of a full-wave rectifier

27. - G7B10

Which of the following describes a linear amplifier?

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

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Upper and lower half-power
B	Pole and zero
C	Image and harmonic
D	Cutoff and rolloff

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency convolution
B	Frequency modulation
C	Frequency transformation
D	Frequency conversion

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is half the symbol rate
B	Higher symbol rates require wider bandwidth
C	Lower symbol rates require wider bandwidth
D	Symbol rate and bandwidth are not related

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	The checksum overflows
B	The connection is dropped
C	Encoding reverts to the default character set
D	Packets will be routed incorrectly

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	100 ohms
B	50 ohms
C	450 ohms
D	75 ohms

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	84 feet
C	132 feet
D	42 feet

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. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Portable direction finding at lower HF frequencies
B	Directional receiving for MF and low HF bands
C	Portable direction finding at higher HF frequencies
D	Directional transmitting for low HF bands