US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on computer modeling
B	All these choices are correct
C	By calculation based on FCC OET Bulletin 65
D	By measurement of field strength using calibrated equipment

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	20 amperes
B	15 amperes
C	25 amperes
D	30 amperes

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.000 MHz to 28.025 MHz only
B	28.025 MHz to 28.300 MHz only
C	The entire band
D	28.000 MHz to 28.300 MHz only

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
B	Only when the foreign country has a formal third-party agreement filed with the FCC
C	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
D	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country

5. - G1C11

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

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the remote station’s country
B	Only those of the FCC
C	Those of both the remote station’s country and the FCC
D	Those of the remote station’s country and the FCC’s third-party regulations

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

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
B	Decrease power and continue to transmit
C	Switch to the opposite sideband
D	Advise the interfering stations that you are on the frequency and that you have priority

10. - G2C08

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

Select	Answer
A	SK
B	BK
C	KN
D	AR

11. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Low-power transmit operation
C	Remote piloted model control
D	Transmission using Quick Response Protocol

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	SSB
B	USB
C	DSB
D	LSB

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It enhances propagation on all HF frequencies
B	It disrupts signals on lower frequencies more than those on higher frequencies
C	None, because only areas on the night side of the Earth are affected
D	It disrupts communications via satellite more than direct communications

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation via ordinary skywave communications is not possible over that path
B	Propagation over the path on all HF frequencies is enhanced
C	HF communications over the path are enhanced
D	Double-hop propagation along the path is more common

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 E region is unstable during daylight hours
B	The F region absorbs signals at these frequencies 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. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	When using digital modes, too much ALC activity can cause the transmitter to overheat
B	ALC will invert the modulation of the AFSK mode
C	The ALC action distorts the signal
D	All these choices are correct

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Higher precision
B	Better for measuring computer circuits
C	Less prone to overload
D	Faster response

18. - G4C08

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

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

19. - G4D04

What does an S meter measure?

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

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
B	The socket is not wired with an RF-shielded power cable
C	Drawing more than 50 watts from this socket could cause the engine to overheat
D	The socket’s wiring may be inadequate for the current drawn by the transceiver

21. - G5A02

What is reactance?

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

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	2.00
B	1.414
C	0.707
D	1.00

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

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Tight tolerance
B	Much less leakage than any other type
C	Inexpensive RF capacitor
D	High capacitance for a given volume

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	MMIC
B	Analog
C	Digital
D	Programmable Logic

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 11
C	Symbol 7
D	Symbol 1

27. - G7B05

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

Select	Answer
A	3
B	6
C	16
D	8

28. - G7C01

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

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

29. - G8A13

What is a link budget?

Select	Answer
A	The difference between transmit power and receiver sensitivity
B	The sum of antenna gains minus system losses
C	The financial costs associated with operating a radio link
D	The sum of transmit power and antenna gains minus system losses as seen at the receiver

30. - G8B08

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

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

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Error correction is used to ensure accurate message reception
B	Upper case letters use longer Varicode bit sequences and thus slow down transmission
C	Upper case letters are sent with more power
D	Higher power is needed as compared to RTTY for similar error rates

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	5:1
B	1:5
C	2:1
D	1:2

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

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1 wavelength
B	3/4 wavelength
C	1/4 wavelength
D	1/2 wavelength

35. - G9D06

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

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

Figure G7-1