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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	3750 kHz
B	3900 kHz
C	4005 kHz
D	1875 kHz

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	They are not permitted
B	Only "10 codes" are permitted
C	Only "Q" signals are permitted
D	They may be used if they do not obscure the meaning of a message

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	19.6 kilobaud
B	56 kilobaud
C	300 baud
D	1200 baud

4. - G1D09

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

Select	Answer
A	365 days
B	For as long as your current license is valid
C	180 days
D	30 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 under automatic control
B	When messages are encrypted
C	Under no circumstances
D	When messages are not encrypted

6. - G2A04

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

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

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	QSOs in progress always have priority
B	Nets always have priority
C	Except during FCC declared emergencies, no one has priority access to frequencies
D	Contest operations must always yield to non-contest use of frequencies

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	Key clicks
B	Report was read from an S meter rather than estimated
C	Chirpy or unstable signal
D	100 percent copy

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To encourage self-regulation and compliance with the rules by radio amateur operators
B	To coordinate repeaters for efficient and orderly spectrum usage
C	To provide emergency and public safety communications
D	To conduct efficient and orderly amateur licensing examinations

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	RTTY
B	Skywarn
C	Winlink
D	ARES

11. - G3A05

What is the solar flux index?

Select	Answer
A	A count of sunspots which is adjusted for solar emissions
B	A measure of the highest frequency that is useful for ionospheric propagation between two points on the Earth
C	A measure of solar radiation at 10.7 centimeters wavelength
D	Another name for the American sunspot number

12. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	Time of day and season
B	Path distance and location
C	All of these choices are correct
D	Solar radiation and ionospheric disturbances

13. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A right-hand circularly polarized antenna
B	A vertical antenna
C	A left-hand circularly polarized antenna
D	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground

14. - G4A08

What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?

Select	Answer
A	Maximum power output without exceeding maximum allowable plate current
B	Minimum plate current without exceeding maximum allowable grid current
C	Highest plate voltage while minimizing grid current
D	Minimum SWR on the antenna

15. - G4B03

Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

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

16. - G4C07

What is one good way to avoid unwanted effects of stray RF energy in an amateur station?

Select	Answer
A	Use a ground loop for best conductivity
B	Connect all equipment grounds together
C	Install a few ferrite beads on the ground wire where it connects to your station
D	Install an RF filter in series with the ground wire

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	7.178 to 7.181 MHz
B	7.178 to 7.184 MHz
C	7.175 to 7.178 MHz
D	7.1765 to 7.1795 MHz

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photovoltaic conversion
B	Photon emission
C	Photosynthesis
D	Photon decomposition

19. - G5A03

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

Select	Answer
A	Conductance
B	Admittance
C	Reactance
D	Reluctance

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 11 milliwatts
B	Approximately 61 milliwatts
C	Approximately 61 watts
D	Approximately 11 watts

21. - G5C11

What is the inductance of a 20 millihenry inductor connected in series with a 50 millihenry inductor?

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

22. - G6A10

Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?

Select	Answer
A	Control grid
B	Screen Grid
C	Trigger electrode
D	Heater

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Reverse Biased
B	Forward Biased
C	Beyond cutoff
D	At the Zener voltage

24. - G7A12

Which symbol in Figure G7-1 represents a multiple-winding transformer?

Select	Answer
A	Symbol 7
B	Symbol 4
C	Symbol 6
D	Symbol 1

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	Low standby power
B	High Efficiency
C	Low distortion
D	No need for bias

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	RF oscillator
B	Balanced modulator
C	IF filter
D	Product detector

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Double sideband
B	Single sideband
C	Frequency modulation
D	Phase modulation

28. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Image response
B	Quadrature noise
C	Intermediate interference
D	Mixer interference

29. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters use longer Varicode signals and thus slow down transmission
B	Upper case letters make the signal stronger
C	Higher power is needed as compared to RTTY for similar error rates
D	Varicode Error Correction is used to ensure accurate message reception

30. - G9A07

What must be done to prevent standing waves on an antenna feed line?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
C	The feed line must be cut to a length equal to an even number of physical half wavelengths
D	The feed line must be cut to a length equal to an odd number of electrical quarter wavelengths

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	42 feet
C	84 feet
D	131 feet

32. - G9C06

What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?

Select	Answer
A	The driven element must be fed with a balun transformer
B	The reflector element must be approximately 5 percent shorter than the driven element
C	There must be an open circuit in the driven element at the point opposite the feed point
D	The reflector element must be approximately 5 percent longer than the driven element

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	SWR varies periodically as a function of boom length
B	Gain varies logarithmically as a function of frequency
C	Length and spacing of the elements increase logarithmically from one end of the boom to the other
D	Impedance varies periodically as a function of frequency

34. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?

Select	Answer
A	Post a copy of OET Bulletin 65 in the station
B	All of these choices are correct
C	Perform a routine RF exposure evaluation
D	Post a copy of FCC Part 97.13 in the station

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	RF exposure limits of the human body
B	Acceptable modulation limits
C	Acceptable bandwidth limits
D	Electrical safety inside the ham shack

Figure G7-1