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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?

SelectAnswer
AMake sure that MPE limits are not exceeded in occupied areas
BLocate the antenna close to your operating position to minimize feed-line radiation
CMake sure the antenna is properly shielded
DPosition the antenna along the edge of a wall to reduce parasitic radiation

2. - G0B05

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

SelectAnswer
AAll these choices are correct
BCurrent flowing from one or more of the hot wires directly to ground
CCurrent flowing from one or more of the hot wires to the neutral wire
DOvervoltage on the hot wires

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

SelectAnswer
AAmateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
BAmateur stations must not cause harmful interference to primary users and must accept interference from primary users
CAmateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
DAmateur stations may use the band only during emergencies

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

SelectAnswer
A21.08 MHz to 21.09 MHz
BOn any frequency if power is less than 1 watt
COn any frequency if transmissions are in Morse code
D28.20 MHz to 28.30 MHz

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

SelectAnswer
A1000 watts PEP output
B100 watts PEP output
C2000 watts PEP output
D1500 watts PEP output

6. - G1D10

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

SelectAnswer
AThere is no age limit
B18 years
C16 years
D21 years

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

SelectAnswer
A1500 watts
B100 milliwatts
C10 watts
D100 watts

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

SelectAnswer
ASuppressed sideband
BUpper sideband
CDouble sideband
DLower sideband

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

SelectAnswer
AFollow the voluntary band plan
BIdentify your station by transmitting your call sign at least 3 times
CListen on the frequency for at least two minutes to be sure it is clear
DAll these choices are correct

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

SelectAnswer
AAR
BSK
CBK
DKN

11. - G2D01

What is the Volunteer Monitor Program?

SelectAnswer
AAmateur volunteers who conduct amateur licensing examinations
BAmateur volunteers who use their station equipment to help civil defense organizations in times of emergency
CAmateur volunteers who conduct frequency coordination for amateur VHF repeaters
DAmateur volunteers who are formally enlisted to monitor the airwaves for rules violations

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

SelectAnswer
ATo provide high-speed data services during an emergency or community event
BTo provide FM repeater coverage in remote areas
CTo provide DX spotting reports to aid contesters and DXers
DTo provide real time propagation data by monitoring amateur radio transmissions worldwide

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

SelectAnswer
A28 days
B4 to 8 minutes
C14 days
D15 hours to several days

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

SelectAnswer
AThey are refracted back to Earth
BThey are attenuated before reaching the destination
CThey are refracted and trapped in the ionosphere to circle Earth
DThey pass through the ionosphere

15. - G3C11

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

SelectAnswer
AThe D region
BThe E region
CThe F2 region
DThe F1 region

16. - G4A03

How does a noise blanker work?

SelectAnswer
ABy redirecting noise pulses into a filter capacitor
BBy clipping noise peaks
CBy temporarily increasing received bandwidth
DBy reducing receiver gain during a noise pulse

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

SelectAnswer
AA signal generator
BAn oscilloscope
CAn ammeter
DAn ohmmeter

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

SelectAnswer
ASolder flux will prevent a low conductivity connection
BSolder has too high a dielectric constant to provide adequate lightning protection
CA soldered joint will likely be destroyed by the heat of a lightning strike
DAll these choices are correct

19. - G4D04

What does an S meter measure?

SelectAnswer
AReceived signal strength
BTransmitter power output
CImpedance
DCarrier suppression

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

SelectAnswer
AHarmonic radiation may increase
BOperating bandwidth may be very limited
CQ of the antenna will be very low
DShort antennas are more likely to cause distortion of transmitted signals

21. - G5A03

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

SelectAnswer
AReluctance
BConductance
CAdmittance
DReactance

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

SelectAnswer
A1500 watts
B2120 watts
C1060 watts
D530 watts

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

SelectAnswer
AMutual capacitance
BDisplacement current coupling
CCapacitive coupling
DMutual inductance

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

SelectAnswer
AIts reactance increases
BIt becomes capacitive
CHarmonics are generated
DCatastrophic failure is likely

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

SelectAnswer
ABNC
BType N
CPL-259
DRCA Phono

26. - G7A04

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

SelectAnswer
AThe output voltage is two times the peak input voltage
BOnly one diode is required
CMore current can be drawn from the half-wave rectifier
DThe ripple frequency is twice that of a full-wave rectifier

27. - G7B11

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

SelectAnswer
AAll these choices are correct
BAM
CFM
DSSB

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

SelectAnswer
AThe DSP filter is much more effective at VHF frequencies
BMixing products are greatly reduced
CFewer digital components are required
DA wide range of filter bandwidths and shapes can be created

29. - G8A08

Which of the following is an effect of overmodulation?

SelectAnswer
AExcessive bandwidth
BFrequency drift
CInsufficient bandwidth
DInsufficient audio

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

SelectAnswer
AIntercept point
BOdd-order
CSecond harmonics
DEven-order

31. - G8C12

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

SelectAnswer
AVaricode
BVolumetric
CBinary
DViterbi

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

SelectAnswer
AAttenuation decreases
BAttenuation is independent of frequency
CAttenuation increases
DAttenuation follows Marconi’s Law of Attenuation

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

SelectAnswer
A16 feet
B21 feet
C8 feet
D11 feet

34. - G9C07

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

SelectAnswer
AThe power radiated in the major lobe compared to that in the opposite direction
BThe number of directors versus the number of reflectors
CThe relative position of the driven element with respect to the reflectors and directors
DThe ratio of forward gain to dipole gain

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

SelectAnswer
AIt allows simultaneous vertical and horizontal polarization
BIt allows quick selection of vertical or horizontal polarization
CIt narrows the main lobe in elevation
DIt narrows the main lobe in azimuth