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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	All commercial stations; amateur radio stations are exempt
B	Only stations with antennas lower than one wavelength above the ground
C	All stations with a time-averaged transmission of more than one milliwatt
D	Only stations transmitting more than 500 watts PEP

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 12
B	AWG number 16
C	AWG number 20
D	AWG number 8

3. - G1A08

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

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

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	All these choices are correct
B	Transmissions to assist with learning the International Morse code
C	Unidentified test transmissions of less than 10 seconds in duration
D	Regular transmissions offering equipment for sale, if intended for amateur radio use

5. - G1C09

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

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

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	Only on the Technician band segments until you have a receipt for the FCC application fee payment
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician class band segment except 30 meters and 60 meters
D	On any General or Technician class band segment

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	All these choices are correct
C	When operating within one mile of an FCC Monitoring Station
D	When a station is transmitting spread spectrum emissions

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	It is commonly accepted amateur practice
B	Lower sideband is the only sideband legal on these frequency bands
C	Because it is fully compatible with an AM detector
D	Lower sideband is more efficient than upper sideband at these frequencies

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	2 kHz to 3 kHz
B	150 Hz to 500 Hz
C	Approximately 6 kHz
D	5 Hz to 50 Hz

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	No US stations should call
B	Operating full break-in
C	Closing station now
D	Listening only for a specific station or stations

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Identify your station according to normal FCC regulations
B	Send a QSL card to the stations worked, or QSL via Logbook of The World
C	Submit a log to the contest sponsor
D	All these choices are correct

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Printer/Server
B	RJ-45
C	Gateway
D	Terminal Node Controller

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
B	A zero sunspot number indicates that radio propagation is not possible on any band
C	A zero sunspot number indicates undisturbed conditions
D	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just above the critical frequency
B	Just above the LUF
C	Just below the critical frequency
D	Just below the MUF

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The highest frequency which is refracted back to Earth
B	The lowest frequency which is refracted back to Earth
C	The frequency at which the signal-to-noise ratio approaches unity
D	The frequency at which the signal-to-noise ratio is 6 dB

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
C	To prevent transient overmodulation
D	To prevent key clicks on CW

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

18. - G4C05

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

Select	Answer
A	The ground wire has high impedance on that frequency
B	The ground rod is resonant
C	Insulated wire has been used for the ground wire
D	Flat braid rather than round 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 less powerful
B	It is 10 times less powerful
C	It is 20 times more powerful
D	It is 100 times more powerful

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	“Picket fencing”
C	Efficiency of the electrically short antenna
D	The wire gauge of the DC power line to the transceiver

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A length of transmission line
B	A transformer
C	A Pi-network
D	All these choices are correct

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	169.7 volts
B	240.0 volts
C	339.4 volts
D	84.8 volts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	40 volts
B	25.5 volts
C	360 volts
D	120 volts

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Saturation and cutoff
B	The active region (between cutoff and saturation)
C	Peak and valley current points
D	Enhancement and depletion modes

25. - G6B12

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

Select	Answer
A	BNC
B	PL-259
C	Type N
D	RCA Phono

26. - G7A02

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

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

27. - G7B06

What is a shift register?

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

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	Carrier oscillator
C	RF amplifier
D	IF amplifier

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 keying an FM transmitter with a sub-audible tone
C	By using a transceiver’s computer data interface protocol to change frequencies
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Heterodyning
B	Frequency inversion
C	Phase inversion
D	Synthesizing

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is horizontal, signal strength is intensity, time is vertical
C	Frequency is vertical, signal strength is intensity, time is horizontal
D	Frequency is vertical, signal strength is horizontal, time is intensity

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR reduces the relative effect of transmission line loss
B	High SWR increases loss in a lossy transmission line
C	There is no relationship between transmission line loss and SWR
D	High SWR makes it difficult to measure transmission line loss

33. - G9B12

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

Select	Answer
A	16 feet
B	21 feet
C	8 feet
D	11 feet

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
B	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
C	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
D	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To enable multiband operation
B	To prevent out-of-band operation
C	To provide balanced feed point impedance
D	To notch spurious frequencies