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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations are allowed to use the band only during emergencies
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Transmission of bulletins of general interest to Amateur Radio licensees
B	Identifying net frequencies
C	Observation of propagation and reception
D	Automatic identification of repeaters

3. - G1C10

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

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

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	Extra, General and Technician
B	Technician only
C	General only
D	General and Technician

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Robotically controlled station
B	Fail-safe digital station
C	Automatically controlled digital station
D	Locally controlled station

6. - G2A09

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

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Because it is fully compatible with an AM detector
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 the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
C	Listen for 2 minutes before calling CQ
D	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response

8. - G2C08

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

Select	Answer
A	BK
B	AR
C	SK
D	KN

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 conduct efficient and orderly amateur licensing examinations
D	To provide emergency and public safety communications

10. - G2E08

In what segment of the 20-meter band are most PSK31 operations commonly found?

Select	Answer
A	Below the RTTY segment, near 14.070 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 MHz
C	In the middle of the CW segment, near 14.100 MHz
D	At the top of the SSB phone segment, near 14.325 MHz

11. - G3A08

Which of the following effects can a geomagnetic storm have on radio propagation?

Select	Answer
A	Improved chances of UHF ducting
B	Improved ground-wave propagation
C	Degraded high-latitude HF propagation
D	Improved high-latitude HF propagation

12. - G3B11

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

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	HF communications over the path are enhanced
C	No HF radio frequency will support ordinary sky-wave communications over the path
D	Double hop propagation along the path is more common

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	They have high intelligibility
B	All of these choices are correct
C	They have a wavering sound
D	They have very large swings in signal strength

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Low input SWR
B	Insufficient drive power
C	Shorting the input signal to ground
D	Excessive drive power

15. - G4B07

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

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

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Bypass inductor
B	Reverse-biased diode
C	Forward-biased diode
D	Bypass capacitor

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

18. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full size antenna?

Select	Answer
A	Harmonic radiation may increase
B	Operating bandwidth may be very limited
C	Short antennas can only receive circularly polarized signals
D	Short antennas are more likely to cause distortion of transmitted signals

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

Select	Answer
A	5000 watts
B	2500 watts
C	625 watts
D	8.75 watts

21. - G5C05

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

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

22. - G6A06

Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?

Select	Answer
A	Higher breakdown voltage
B	Longer switching times
C	Lower capacitance
D	Lower inductance

23. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

Select	Answer
A	RJ-11
B	DB-25
C	Octal
D	PL-259

24. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 4
B	Symbol 2
C	Symbol 1
D	Symbol 5

25. - G7B02

Which of the following is an advantage of using the binary system when processing digital signals?

Select	Answer
A	Binary numbers are more compatible with analog circuitry
B	The binary number system is most accurate
C	All of these choices are correct
D	Binary "ones" and "zeros" are easy to represent by an "on" or "off" state

26. - G7C10

How is Digital Signal Processor filtering accomplished?

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

27. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Pulse modulation
B	Amplitude modulation
C	Phase modulation
D	Multiplex modulation

28. - G8B06

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

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

29. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?

Select	Answer
A	The checksum overflows
B	Encoding reverts to the default character set
C	Packets will be routed incorrectly
D	The connection is dropped

30. - G9A15

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	The higher the transmission line loss, the more the SWR will read artificially low
B	The higher the transmission line loss, the more accurate the SWR measurement will be
C	Transmission line loss does not affect the SWR measurement
D	The higher the transmission line loss, the more the SWR will read artificially high

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Lengthen the radials
B	Shorten the radials
C	Slope the radials upward
D	Slope the radials downward

32. - G9C04

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

Select	Answer
A	The reflector is normally the longest element
B	All of the elements must be the same length
C	The director is normally the longest element
D	The reflector is normally the shortest element

33. - 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	Harmonic suppression
C	Wide bandwidth
D	Polarization diversity

34. - G0A12

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

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

35. - G0B14

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

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

Figure G7-1