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

2. - G0B04

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

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

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. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	200 feet
B	250 feet
C	50 feet
D	100 feet

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	1.8 kHz
B	3 kHz
C	5.6 kHz
D	2.8 kHz

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	16 years
B	21 years
C	There is no age limit
D	18 years

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

8. - G2A12

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

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

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 2 hours per month
C	No more than 2 hours per week
D	No more than 1 hour per month

10. - G2C09

What does the Q signal “QSL” mean?

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

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

12. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	Receiver attenuator set to -12 dB
B	A vertically polarized antenna
C	Computer time accurate to within approximately 1 second
D	A special hardware modem

13. - G3A08

How can a geomagnetic storm affect HF propagation?

Select	Answer
A	Degrade ground wave propagation
B	Improve ground wave propagation
C	Degrade high-latitude HF propagation
D	Improve high-latitude HF propagation

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	Signal strength increased by 3 dB
B	A slightly delayed echo might be heard
C	The signal might be cancelled causing severe attenuation
D	Periodic fading approximately every 10 seconds

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

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

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	To allow time for switching the antenna from the receiver to the transmitter
B	Automatic generation of dots and dashes for CW operation
C	Automatic transmit/receive switching
D	Computer interface for PSK and RTTY operation

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

18. - G4C08

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

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

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz below the edge of the segment
B	At least 1 kHz above the edge of the segment
C	At least 1 kHz below the edge of the segment
D	At least 3 kHz above the edge of the segment

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 increase the power handling capacity of a whip antenna
C	To reduce radiation resistance
D	To lower the radiation angle

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. - G5B12

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

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

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A capacitor in parallel
B	An inductor in parallel
C	An inductor in series
D	A capacitor in series

24. - G6A08

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

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Better suited for power supply regulation
B	Better suited for RF amplification
C	Low power consumption
D	High power handling capability

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Capacitors and inductors
B	Transformers and transducers
C	Diodes
D	All these choices are correct

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input power
B	Multiply the RF input power by the reciprocal of the RF output power
C	Divide the DC input power by the DC output power
D	Add the RF input power to the DC output power

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	Cutoff frequency
B	Notch frequency
C	Neper frequency
D	Rolloff frequency

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Frequency modulation
C	Power modulation
D	Phase modulation

30. - G8B08

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

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

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	902 MHz
B	432 MHz
C	2.4 GHz
D	10.7 GHz

32. - G9A11

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

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

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

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The power radiated in the major lobe compared to that in the opposite direction
B	The relative position of the driven element with respect to the reflectors and directors
C	The number of directors versus the number of reflectors
D	The ratio of forward gain to dipole gain

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Wide bandwidth
B	Higher gain per element than a Yagi antenna
C	Polarization diversity
D	Harmonic suppression