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

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	300 feet
B	50 feet
C	200 feet
D	100 feet

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

Select	Answer
A	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner
B	The person must hold an FCC granted Amateur Radio license of General Class or above
C	The person's home citizenship must be in ITU region 2
D	The person must be a resident of the U.S. for a minimum of 5 years

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Any message, as long as the amateur operator is not paid
B	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
C	Only messages for other licensed amateurs
D	Any messages, as long as the text of the message is recorded in the station log

6. - G2A06

Which of the following is an advantage when using single sideband as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Ease of tuning on receive and immunity to impulse noise
B	Less bandwidth used and greater power efficiency
C	Less subject to interference from atmospheric static crashes
D	Very high fidelity voice modulation

7. - G2B12

When is an amateur station allowed to use any means at its disposal to assist another station in distress?

Select	Answer
A	Only on authorized HF frequencies
B	Only when transmitting in RACES
C	At any time during an actual emergency
D	At any time when transmitting in an organized net

8. - G2C04

What does the Q signal "QRL?" mean?

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

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	Call sign of station contacted and the signal report given
B	Band and/or frequency of the contact
C	All of these choices are correct
D	Date and time of contact

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.275 - 14.350 MHz
B	14.000 - 14.050 MHz
C	14.070 - 14.100 MHz
D	14.150 - 14.225 MHz

11. - G3A16

What is a possible benefit to radio communications resulting from periods of high geomagnetic activity?

Select	Answer
A	Higher signal strength for HF signals passing through the polar regions
B	Reduced long delayed echoes
C	Auroras that can reflect VHF signals
D	Improved HF long path propagation

12. - G3B08

What does MUF stand for?

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

13. - G3C06

What is a characteristic of HF scatter signals?

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

14. - G4A07

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

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

15. - G4B06

What is an advantage of a digital voltmeter as compared to an analog voltmeter?

Select	Answer
A	Better precision for most uses
B	Better for RF measurements
C	Faster response
D	Better for measuring computer circuits

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	A steady hum whenever the transmitter is on the air
B	Clearly audible speech
C	Distorted speech
D	On-and-off humming or clicking

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Increase the intelligibility of transmitted phone signals during poor conditions
B	Prevent distortion of voice signals
C	Decrease high-frequency voice output to prevent out of band operation
D	Increase transmitter bass response for more natural sounding SSB signals

18. - G4E10

What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	The diode prevents self-discharge of the battery though the panel during times of low or no illumination
B	The diode serves to regulate the charging voltage to prevent overcharge
C	The diode greatly increases the efficiency during times of high illumination
D	The diode limits the current flowing from the panel to a safe value

19. - G5A07

What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?

Select	Answer
A	The source can deliver maximum power to the load
B	No current can flow through the circuit
C	The electrical load is shorted
D	The source delivers minimum power to the load

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	20.5 percent
B	12.2 percent
C	10.9 percent
D	25.9 percent

21. - G5C09

What is the capacitance of three 100 microfarad capacitors connected in series?

Select	Answer
A	300 microfarads
B	0.33 microfarads
C	33.3 microfarads
D	0.30 microfarads

22. - G6A18

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	All of these choices are correct
B	Most of the magnetic field is contained in the core
C	The magnetic properties of the core may be optimized for a specific range of frequencies
D	Large values of inductance may be obtained

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	All of these choices are correct
B	Lower power consumption
C	Longer life
D	Faster response time

24. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 1
B	Symbol 11
C	Symbol 7
D	Symbol 2

25. - G7B07

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

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

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

27. - G8A08

Which of the following is an effect of overmodulation?

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

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Phase inverting
B	Heterodyning
C	Synthesizing
D	Cancellation

29. - G8C02

How many data bits are sent in a single PSK31 character?

Select	Answer
A	7
B	The number varies
C	8
D	5

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 feed line must be cut to a length equal to an odd number of electrical quarter wavelengths
C	The feed line must be cut to a length equal to an even number of physical half wavelengths
D	The antenna feed point impedance must be matched to the characteristic impedance of the feed line

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It reaches a maximum at an angle of 45 degrees
B	It stays the same
C	It decreases
D	It increases

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The number of directors versus the number of reflectors
B	The relative position of the driven element with respect to the reflectors and directors
C	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
D	The ratio of forward gain to dipole gain

33. - G9D08

Why is a Beverage antenna not used for transmitting?

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

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should be installed such that it is protected against unauthorized access
B	It should not be installed in a wet area
C	It should not be installed higher than you can reach
D	It should limited to 10 feet in height

35. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	100 amperes
B	30 amperes
C	60 amperes
D	15 amperes

Figure G7-1