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. - G1A05

Which of the following frequencies is in the General Class portion of the 40-meter band?

Select	Answer
A	7.500 MHz
B	40.200 MHz
C	40.500 MHz
D	7.250 MHz

2. - G1B07

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

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

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

4. - G1D10

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

Select	Answer
A	12 years
B	21 years
C	18 years
D	There is no age limit

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

6. - G2A07

Which of the following statements is true of the single sideband voice mode?

Select	Answer
A	Only one sideband and the carrier are transmitted; the other sideband is suppressed
B	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands
C	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
D	Only one sideband is transmitted; the other sideband and carrier are suppressed

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When they seize your equipment for use in disaster communications
B	When the President's War Emergency Powers have been invoked
C	Only when all amateur stations are instructed to stop transmitting
D	When they declare a temporary state of communication emergency

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	We have worked before
B	We have already confirmed by card
C	Send slower
D	I acknowledge receipt

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
B	Amateur volunteers who conduct amateur licensing examinations
C	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
D	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Skywarn
B	ARES
C	RTTY
D	Winlink

11. - G3A05

What is the solar flux index?

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

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

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

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

14. - G4A10

What is the purpose of an electronic keyer?

Select	Answer
A	Automatic generation of strings of dots and dashes for CW operation
B	Automatic transmit/receive switching
C	VOX operation
D	Computer interface for PSK and RTTY operation

15. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Radio wave propagation
B	RF interference
C	Standing wave ratio
D	Antenna front-to-back ratio

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	The DSP filter is much more effective at VHF frequencies
B	Fewer digital components are required
C	Mixing products are greatly reduced
D	A wide range of filter bandwidths and shapes can be created

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz above the edge of the segment
B	At least 1 kHz above the edge of the segment
C	At least 3 kHz below the edge of the segment
D	Your displayed carrier frequency may be set at the edge of the segment

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	The wire gauge of the DC power line to the transceiver
C	"Picket Fencing" signal variation
D	The antenna system

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To minimize radiation resistance
B	To minimize transmitter power output
C	To maximize the transfer of power
D	To reduce power supply ripple

20. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak-to-peak value
B	The peak value
C	The reciprocal of the RMS value
D	The RMS value

21. - G5C17

What is the value in nanofarads (nF) of a 22,000 pF capacitor?

Select	Answer
A	2.2 nF
B	22 nF
C	0.22 nF
D	220 nF

22. - G6A04

When is it acceptable to recharge a carbon-zinc primary cell?

Select	Answer
A	As long as the voltage has not been allowed to drop below 1.0 volt
B	Never
C	When a constant current charger is used
D	When the cell is kept warm during the recharging period

23. - G6B16

Which of the following describes a type N connector?

Select	Answer
A	A threaded connector used for hydraulic systems
B	A small bayonet connector used for data circuits
C	An audio connector used in surround-sound installations
D	A moisture-resistant RF connector useful to 10 GHz

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	High frequency operation allows the use of smaller components
B	Fewer circuit components are required
C	All of these choices are correct
D	Faster switching time makes higher output voltage possible

25. - G7B07

What are the basic components of virtually all sine wave oscillators?

Select	Answer
A	A filter and an amplifier operating in a feedback loop
B	An amplifier and a divider
C	A frequency multiplier and a mixer
D	A circulator and a filter operating in a feed-forward loop

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Variable frequency with the stability of a crystal oscillator
B	Relatively high power output
C	Relatively low power consumption
D	Wide tuning range and no need for band switching

27. - G8A08

Which of the following is an effect of overmodulation?

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

28. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	16 kHz
B	3 kHz
C	8 kHz
D	5 kHz

29. - G8C12

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

Select	Answer
A	Viterbi
B	Varicode
C	Binary
D	Volumetric

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	50:1
B	5:1
C	2:1
D	1:5

31. - G9B01

What is one disadvantage of a directly fed random-wire HF antenna?

Select	Answer
A	It must be longer than 1 wavelength
B	It is more effective on the lower HF bands than on the higher bands
C	You may experience RF burns when touching metal objects in your station
D	It produces only vertically polarized radiation

32. - G9C03

Which statement about a three-element, single-band Yagi antenna is true?

Select	Answer
A	Low feed point impedance increases bandwidth
B	The director is normally the shortest element
C	The driven element is the longest element
D	The reflector is normally the shortest element

33. - G9D05

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

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

34. - G0A03

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

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

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	Solder flux will prevent a low conductivity connection
B	The resistance of solder is too high
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	Solder has too high a dielectric constant to provide adequate lightning protection