US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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1. - G1A08

Which of the following frequencies is within the General Class portion of the 80-meter band?

Select	Answer
A	1855 kHz
B	3650 kHz
C	3560 kHz
D	2560 kHz

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	A beacon station may not use automatic control
B	There must be no more than one beacon signal transmitting in the same band from the same station location
C	The frequency must be posted on the Internet or published in a national periodical
D	The frequency must be coordinated with the National Beacon Organization

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Power should be limited as necessary to avoid interference to another radio service on the frequency
B	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
C	Effective radiated power cannot exceed 1500 watts
D	Only the minimum power necessary to carry out the desired communications should be used

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	30 days
C	180 days
D	365 days

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	When messages are encrypted
B	When under automatic control
C	When messages are not encrypted
D	Under no circumstances

6. - G2A08

Which of the following is a recommended way to break into a contact when using phone?

Select	Answer
A	Say "QRZ" several times followed by your call sign
B	Say "CQ" followed by the call sign of either station
C	Say your call sign during a break between transmissions by the other stations
D	Say "Break Break Break" and wait for a response

7. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Any control operator when normal communication systems are operational
B	Only a RACES net control operator
C	Only a person holding an FCC issued amateur operator license
D	A person holding an FCC issued amateur operator license or an appropriate government official

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Matching your transmit frequency to the frequency of a received signal
B	Matching the speed of the transmitting station
C	Sending without error
D	Operating split to avoid interference on frequency

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Direction finding used to locate stations violating FCC Rules
B	Hunters have an opportunity to transmit on non-amateur frequencies
C	Identification of out of band operation
D	Identification of different call signs

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Respond when the station broadcasts its SSID
B	Send QRL in Morse code
C	Transmit a connect message on the station's published frequency
D	Send an email to the system control operator

11. - G3A15

How long does it take charged particles from coronal mass ejections to affect radio propagation on the Earth?

Select	Answer
A	14 days
B	28 days
C	20 to 40 hours
D	4 to 8 minutes

12. - G3B10

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the E region?

Select	Answer
A	180 miles
B	1,200 miles
C	2,500 miles
D	12,000 miles

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagations is through ducts in F region which absorb most of the energy
B	Only a small part of the signal energy is scattered into the skip zone
C	Propagation is through ground waves which absorb most of the signal energy
D	Signals are scattered from the magnetosphere which is not a good reflector

14. - G4A09

Why is a time delay sometimes included in a transmitter keying circuit?

Select	Answer
A	To prevent stations from interfering with one another
B	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed
C	To allow time for a warning signal to be sent to other stations
D	To allow the transmitter power regulators to charge properly

15. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two swept frequency tones
B	Two non-harmonically related audio signals
C	Two audio signals of the same frequency shifted 90 degrees
D	Two audio frequency range square wave signals of equal amplitude

16. - G4C08

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

Select	Answer
A	Adding series capacitors to the conductors
B	Placing a ferrite choke around the cable
C	Adding an additional insulating jacket to the cable
D	Adding shunt inductors to the conductors

17. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.175 to 7.178 MHz
B	7.1765 to 7.1795 MHz
C	7.178 to 7.181 MHz
D	7.178 to 7.184 MHz

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

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

19. - G5A04

Which of the following causes opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Admittance
B	Reluctance
C	Conductance
D	Reactance

20. - G5B04

How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	24 watts
B	6 watts
C	2.4 watts
D	60 watts

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	1000 microfarads
B	70 microfarads
C	0.07 microfarads
D	14.3 microfarads

22. - G6A09

Which of the following describes the construction of a MOSFET?

Select	Answer
A	The source is separated from the drain by a thin insulating layer
B	The gate is separated from the channel with a thin insulating layer
C	The gate is formed by a back-biased junction
D	The source is formed by depositing metal on silicon

23. - G6B11

What is a microprocessor?

Select	Answer
A	A microwave detector, amplifier, and local oscillator on a single integrated circuit
B	A low voltage amplifier used in a microwave transmitter modulator stage
C	A computer on a single integrated circuit
D	A low power analog signal processor used as a microwave detector

24. - 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	Quartz crystals
D	Diodes

25. - G7B04

Which of the following describes the function of a two input NOR gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is low only when both inputs are high

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Product detector
B	Mixer
C	Discriminator
D	Phase inverter

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Frequency drift
B	Excessive bandwidth
C	Insufficient bandwidth
D	Insufficient audio

28. - G8B05

What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

Select	Answer
A	500 Hz
B	31.5 Hz
C	2300 Hz
D	1800 Hz

29. - G8C12

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

Select	Answer
A	Viterbi
B	Varicode
C	Volumetric
D	Binary

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	25 and 30 ohms
B	50 and 75 ohms
C	80 and 100 ohms
D	500 and 750 ohms

31. - G9B05

How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?

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

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

Select	Answer
A	Approximately 6 dB higher
B	Approximately 9 dB higher
C	Approximately 3 dB higher
D	Approximately 1.5 dB higher

33. - G9D05

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

Select	Answer
A	It allows simultaneous vertical and horizontal polarization
B	It narrows the main lobe in elevation
C	It narrows the main lobe in azimuth
D	It allows quick selection of vertical or horizontal polarization

34. - G0A03

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

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

35. - G0B13

What must you do when powering your house from an emergency generator?

Select	Answer
A	Disconnect the incoming utility power feed
B	Insure that all lightning grounds are disconnected
C	Insure that the generator is not grounded
D	All of these choices are correct