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

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event
B	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
C	The FCC must have declared a state of emergency
D	All of these choices are correct

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	56 kilobaud
D	300 baud

4. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?

Select	Answer
A	Whenever you operate using Technician frequency privileges
B	Whenever you operate using General Class frequency privileges
C	A special identifier is not required as long as your General Class license application has been filed with the FCC
D	Whenever you operate on any amateur frequency

5. - G1E05

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

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

6. - G2A09

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

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

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	At any time during an actual emergency
C	Only when transmitting in RACES
D	At any time when transmitting in an organized net

8. - G2C11

What does the Q signal "QRV" mean?

Select	Answer
A	You are sending too fast
B	I am ready to receive messages
C	There is interference on the frequency
D	I am quitting for the day

9. - G2D06

How is a directional antenna pointed when making a "long-path" contact with another station?

Select	Answer
A	180 degrees from its short-path heading
B	Along the gray line
C	Toward the north
D	Toward the rising Sun

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	DSB
B	CW
C	LSB
D	USB

11. - G3A10

What causes HF propagation conditions to vary periodically in a 28 day cycle?

Select	Answer
A	Cyclic variation in the Earth's radiation belts
B	The position of the Moon in its orbit
C	Long term oscillations in the upper atmosphere
D	The Sun's rotation on its axis

12. - G3B09

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?

Select	Answer
A	2,500 miles
B	180 miles
C	12,000 miles
D	1,200 miles

13. - G3C01

Which ionospheric layer is closest to the surface of the Earth?

Select	Answer
A	The F1 layer
B	The F2 layer
C	The E layer
D	The D layer

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	All of these choices are correct
B	ALC will invert the modulation of the AFSK mode
C	Improper action of ALC distorts the signal and can cause spurious emissions
D	When using digital modes, too much ALC activity can cause the transmitter to overheat

15. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An ohmmeter
B	A signal generator
C	An ammeter
D	An oscilloscope

16. - G4C10

What could be a symptom of a ground loop somewhere in your station?

Select	Answer
A	You receive reports of "hum" on your station's transmitted signal
B	The SWR reading for one or more antennas is suddenly very high
C	An item of station equipment starts to draw excessive amounts of current
D	You receive reports of harmonic interference from your station

17. - G4D01

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

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

18. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To increase the power handling capacity of a whip antenna
B	To electrically lengthen a physically short antenna
C	To allow automatic band changing
D	To allow remote tuning

19. - G5A11

Which of the following describes one method of impedance matching between two AC circuits?

Select	Answer
A	Reduce the power output of the first circuit
B	Increase the power output of the first circuit
C	Insert an LC network between the two circuits
D	Insert a circulator between the two circuits

20. - G5B10

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

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

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	5.9 ohms
C	10000 ohms
D	0.17 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	Lower inductance
B	Longer switching times
C	Lower capacitance
D	Higher breakdown voltage

23. - G6B11

What is a microprocessor?

Select	Answer
A	A low power analog signal processor used as a microwave detector
B	A computer on a single integrated circuit
C	A microwave detector, amplifier, and local oscillator on a single integrated circuit
D	A low voltage amplifier used in a microwave transmitter modulator stage

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	Faster switching time makes higher output voltage possible
C	Fewer circuit components are required
D	All of these choices are correct

25. - G7B10

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

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

26. - G7C05

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

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

27. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The waveform created by connecting the peak values of the modulated signal
B	Spurious signals that envelop nearby frequencies
C	The carrier frequency that contains the signal
D	The bandwidth of the modulated signal

28. - G8B06

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

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

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It terminates the contact
B	It requests a change in transmitting protocol
C	It sends the packet back to the transmitting station
D	It requests the packet be retransmitted

30. - G9A11

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

Select	Answer
A	1:1
B	0:0
C	2:1
D	50:50

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It peaks at about 1/8 wavelength above ground
B	It steadily increases
C	It steadily decreases
D	It is unaffected by the height above ground

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. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To permit multiband operation
B	To notch spurious frequencies
C	To provide balanced feed point impedance
D	To prevent out of band operation

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes the blood count to reach a dangerously low level
B	It causes radiation poisoning
C	It cools body tissue
D	It heats body tissue

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	Acceptable modulation limits
D	Electrical safety inside the ham shack