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	14405 kHz
D	14305 kHz

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	Only "Q" signals are permitted
B	They are not permitted
C	Only "10 codes" are permitted
D	They may be used if they do not obscure the meaning of a message

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

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

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	30 days
B	180 days
C	365 days
D	For as long as your current license is valid

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

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	Contest operations must always yield to non-contest use of frequencies
B	QSOs in progress always have priority
C	Except during FCC declared emergencies, no one has priority access to frequencies
D	Nets always have priority

8. - G2C03

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

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

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
B	Amateur volunteers who conduct amateur licensing examinations
C	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Insufficient modulation
B	Overmodulation
C	Backscatter propagation
D	Long Path propagation

11. - G3A05

What is the solar flux index?

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

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

Select	Answer
A	They pass through the ionosphere
B	They are bent back to the Earth
C	They are bent and trapped in the ionosphere to circle the Earth
D	They are amplified by interaction with the ionosphere

13. - G3C13

What is Near Vertical Incidence Sky-wave (NVIS) propagation?

Select	Answer
A	Long path HF propagation at sunrise and sunset
B	Double hop propagation near the LUF
C	Propagation near the MUF
D	Short distance MF or HF propagation using high elevation angles

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	SWR Bridge
B	Balanced modulator
C	Q Multiplier
D	Antenna coupler or antenna tuner

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A field strength meter
B	A multimeter
C	An antenna noise bridge
D	A Q meter

16. - G4C10

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

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

17. - G4D06

Where is an S meter found?

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

18. - G4E06

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

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

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Siemens
C	Farad
D	Ohm

20. - G5B04

How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	2.4 watts
B	6 watts
C	24 watts
D	60 watts

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To accommodate the higher current of the primary
B	To insure that the volume of the primary winding is equal to the volume of the secondary winding
C	To improve the coupling between the primary and secondary
D	To prevent parasitic oscillations due to resistive losses in the primary

22. - G6A09

Which of the following describes the construction of a MOSFET?

Select	Answer
A	The gate is separated from the channel with a thin insulating layer
B	The gate is formed by a back-biased junction
C	The source is separated from the drain by a thin insulating layer
D	The source is formed by depositing metal on silicon

23. - G6B09

Which of the following is a characteristic of a liquid crystal display?

Select	Answer
A	It requires ambient or back lighting
B	It has a wide viewing angle
C	All of these choices are correct
D	It offers a wide dynamic range

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. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	16
C	3
D	6

26. - G7C05

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

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

27. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency modulation
B	Frequency conversion
C	Frequency transformation
D	Frequency convolution

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It results in the best signal to noise ratio
B	It improves impedance matching of the antenna
C	It minimizes power consumption in the receiver
D	It is required by FCC rules

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By using the varicode character set
B	By controlling transmitter output power for optimum signal strength
C	By using a parity bit with each character
D	By transmitting redundant information with the data

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	50:50
B	1:1
C	2:1
D	0:0

31. - G9B01

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

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

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

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A very long and low directional receiving antenna
B	A broad-band mobile antenna
C	A helical antenna for space reception
D	A vertical antenna

34. - G0A06

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

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

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	15 amperes
C	30 amperes
D	60 amperes

Figure G7-1