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. - G1A07

Which of the following frequencies is within the General Class portion of the 20-meter phone band?

Select	Answer
A	14105 kHz
B	14005 kHz
C	14305 kHz
D	14405 kHz

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be posted on the Internet or published in a national periodical
B	There must be no more than one beacon signal transmitting in the same band from the same station location
C	A beacon station may not use automatic control
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	Only the minimum power necessary to carry out the desired communications should be used
B	Effective radiated power cannot exceed 1500 watts
C	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
D	Power should be limited as necessary to avoid interference to another radio service on the frequency

4. - G1D01

Who may receive credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
B	Any person who can demonstrate that they once held an FCC issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
C	Anyone who held an FCC issued amateur radio license that has been expired for not less than 5 years and not more than 15 years
D	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Every foreign country, unless there is a third party agreement in effect with that country
B	Countries in ITU Region 2
C	Any country which is not a member of the International Amateur Radio Union (IARU)
D	Countries in ITU Region 1

6. - G2A09

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

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

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
B	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
C	Listen for 2 minutes before calling CQ
D	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response

8. - G2C04

What does the Q signal "QRL?" mean?

Select	Answer
A	"Are you listening only for a specific station?"
B	"Will you keep the frequency clear?"
C	"Are you busy?", or "Is this frequency in use?"
D	"Are you operating full break-in" or "Can you operate full break-in?"

9. - G2D05

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

Select	Answer
A	When the contact is with amateurs in any country as long as the communication is conducted in English
B	Only when the foreign country has a formal third party agreement filed with the FCC
C	Only when the foreign country is a member of the International Amateur Radio Union
D	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	LSB
B	SSB
C	USB
D	DSB

11. - G3A14

How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?

Select	Answer
A	HF communications are disturbed
B	VHF/UHF ducting is disturbed
C	HF communications are improved
D	VHF/UHF ducting is improved

12. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency during a 24 hour period
B	The Minimum Usable Frequency for communications between two points
C	The Minimum Usable Frequency during a 24 hour period
D	The Maximum Usable Frequency for communications between two points

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

Select	Answer
A	The E layer is unstable during daylight hours
B	The F layer is unstable during daylight hours
C	The F layer absorbs signals at these frequencies during daylight hours
D	The D layer absorbs signals at these frequencies during daylight hours

14. - G4A02

What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

Select	Answer
A	Accidental out of band operation can be prevented
B	Interference from impulse noise will be eliminated
C	It may be possible to reduce or eliminate interference from other signals
D	More stations can be accommodated within a given signal passband

15. - G4B09

Which of the following can be determined with a field strength meter?

Select	Answer
A	The presence and amount of phase distortion of a transmitter
B	The presence and amount of amplitude distortion of a transmitter
C	The radiation pattern of an antenna
D	The radiation resistance of an antenna

16. - G4C06

What effect can be caused by a resonant ground connection?

Select	Answer
A	Corrosion of the ground rod
B	High RF voltages on the enclosures of station equipment
C	Overheating of ground straps
D	A ground loop

17. - G4D04

What does an S meter measure?

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

18. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.5 VDC
B	0.02 VDC
C	1.38 VDC
D	0.2 VDC

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. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the average of each branch current
B	It equals the sum of the currents through each branch
C	It is the sum of the reciprocal of each individual voltage drop
D	It decreases as more parallel branches are added to the circuit

21. - G5C05

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

Select	Answer
A	150 ohms
B	1500 ohms
C	90 ohms
D	175 ohms

22. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To decrease plate resistance
B	To increase the control grid resistance
C	To reduce grid-to-plate capacitance
D	To increase efficiency

23. - G6B18

What is a type SMA connector?

Select	Answer
A	A type of push-on connector intended for high voltage applications
B	A large bayonet connector usable at power levels in excess of 1 KW
C	A small threaded connector suitable for signals up to several GHz
D	A connector designed for serial multiple access signals

24. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	270 degrees
B	180 degrees
C	90 degrees
D	360 degrees

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Add the RF input power to the DC output power
C	Divide the RF output power by the DC input power
D	Divide the DC input power by the DC output power

26. - G7C10

How is Digital Signal Processor filtering accomplished?

Select	Answer
A	By converting the signal from analog to digital and using digital processing
B	By differential spurious phasing
C	By converting the signal from digital to analog and taking the difference of mixing products
D	By using direct signal phasing

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Double sideband
B	Frequency modulation
C	Single sideband
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	Mixer interference
C	Intermediate interference
D	Quadrature noise

29. - G8C08

Which of the following statements is true about PSK31?

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

30. - G9A08

If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1 to 1 and 5 to 1 depending on the characteristic impedance of the line
B	Between 1 to 1 and 5 to 1 depending on the reflected power at the transmitter
C	1 to 1
D	5 to 1

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter Radials
B	Lower feed point impedance
C	Lower ground reflection losses
D	Lower radiation resistance

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 9 dB higher
B	Approximately 1.5 dB higher
C	Approximately 6 dB higher
D	Approximately 3 dB higher

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	It has poor directivity
B	It has high losses compared to other types of antennas
C	All of these choices are correct
D	Its impedance is too low for effective matching

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	Turn off the transmitter and disconnect the feed line
B	Ensure that you and the antenna structure are grounded
C	Wear a radiation badge
D	All of these choices are correct

35. - G0B11

Which of the following is good practice for lightning protection grounds?

Select	Answer
A	They must be bonded to all buried water and gas lines
B	Bends in ground wires must be made as close as possible to a right angle
C	Lightning grounds must be connected to all ungrounded wiring
D	They must be bonded together with all other grounds