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. - G1A09

Which of the following frequencies is within the General Class portion of the 15-meter band?

Select	Answer
A	21300 kHz
B	14250 kHz
C	24900 kHz
D	18155 kHz

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 FCC must have declared a state of emergency
C	All of these choices are correct
D	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies

3. - G1C10

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

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

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	The person must be a resident of the U.S. for a minimum of 5 years
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	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner

5. - G1E13

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
B	Only in the non-phone Extra Class segments of the bands
C	Anywhere in the 1.25-meter or shorter wavelength bands, and in specified segments of the 80-meter through 2-meter bands
D	On any band segment where digital operation is permitted

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

Select	Answer
A	Vestigial sideband
B	Lower sideband
C	Double sideband
D	Upper sideband

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan for the operating mode you intend to use
B	Check to see if the channel is assigned to another station
C	Identify your station by transmitting your call sign at least 3 times
D	All of these choices are correct

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Operating full break-in
B	Listening for novice stations
C	Listening only for a specific station or stations
D	Closing station now

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	The ITU requires a log of all international contacts
B	The ITU requires a log of all international third party traffic
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information

10. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Joining an existing contact is not possible, PACTOR connections are limited to two stations
B	Send a NAK response continuously so that the sending station has to pause
C	Transmit a steady carrier until the PACTOR protocol times out and disconnects
D	Send broadcast packets containing your call sign while in MONITOR mode

11. - G3A05

What is the solar flux index?

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

12. - G3B02

Which of the following is a good indicator of the possibility of sky-wave propagation on the 6-meter band?

Select	Answer
A	Long skip sky-wave propagation on the 10-meter band
B	Short skip sky-wave propagation on the 10-meter band
C	Severe attenuation of signals on the 10-meter band
D	Long delayed echoes on the 10-meter band

13. - G3C01

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

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

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	No change will be observed
B	A pronounced dip
C	A slow, rhythmic oscillation
D	A pronounced peak

15. - G4B06

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

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

16. - G4C10

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

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

17. - G4D06

Where is an S meter found?

Select	Answer
A	In a conductance bridge
B	In a receiver
C	In an SWR bridge
D	In a transmitter

18. - G4E05

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

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

19. - G5A08

Why is impedance matching important?

Select	Answer
A	To ensure that there is less resistance than reactance in the circuit
B	So the source can deliver maximum power to the load
C	To ensure that the resistance and reactance in the circuit are equal
D	So the load will draw minimum power from the source

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. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	An inductor in parallel
B	A resistor in parallel
C	A capacitor in series
D	An inductor in series

22. - G6A16

What will happen to the resistance if the temperature of a resistor is increased?

Select	Answer
A	It will change depending on the resistor's temperature coefficient
B	It will become time dependent
C	It will change depending on the resistor's reactance coefficient
D	It will stay the same

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Microphone and transceiver
B	Power supply and amplifier
C	Computer and transceiver
D	Amplifier and antenna

24. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 11
B	Symbol 1
C	Symbol 7
D	Symbol 6

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is high only when both inputs are high
B	Output is low only when both inputs are high
C	Output is low when either or both inputs are high
D	Output is high when either or both inputs are low

26. - G7C05

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

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

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	Signal distortion caused by insufficient collector current
B	The transmitter's carrier is properly suppressed
C	Signal distortion caused by excessive drive
D	The transmitter's automatic level control (ALC) is properly adjusted

28. - G8B03

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

Select	Answer
A	Phase inverting
B	Synthesizing
C	Cancellation
D	Heterodyning

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	FSK441 and Hellschreiber
B	RTTY
C	Clover
D	JT9 and JT65

30. - G9A14

What is the interaction between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR makes it difficult to measure transmission line loss
B	High SWR reduces the relative effect of transmission line loss
C	If a transmission line is lossy, high SWR will increase the loss
D	There is no interaction between transmission line loss and SWR

31. - G9B01

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

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

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It is useful for matching multiband antennas
B	It does not require any inductors or capacitors
C	It does not require that the elements be insulated from the boom
D	All of these choices are correct

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Length and spacing of the elements increase logarithmically from one end of the boom to the other
B	Impedance varies periodically as a function of frequency
C	SWR varies periodically as a function of boom length
D	Gain varies logarithmically as a function of frequency

34. - G0A11

What precaution should you take if you install an indoor transmitting antenna?

Select	Answer
A	Make sure the antenna is properly shielded
B	Locate the antenna close to your operating position to minimize feed line radiation
C	Position the antenna along the edge of a wall to reduce parasitic radiation
D	Make sure that MPE limits are not exceeded in occupied areas

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	Only the neutral wire
B	Only the two wires carrying voltage
C	Only the ground wire
D	All wires

Figure G7-1