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. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	12 meters
B	30 meters
C	160 meters
D	20 meters

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	Automatic identification of repeaters
D	Observation of propagation and reception

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

Select	Answer
A	1200 baud
B	19.6 kilobaud
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 General Class frequency privileges
B	Whenever you operate using Technician frequency privileges
C	Whenever you operate on any amateur frequency
D	A special identifier is not required as long as your General Class license application has been filed with the FCC

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Countries in ITU Region 2
B	Countries in ITU Region 1
C	Every foreign country, unless there is a third party agreement in effect with that country
D	Any country which is not a member of the International Amateur Radio Union (IARU)

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

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	Only when all amateur stations are instructed to stop transmitting
B	When they declare a temporary state of communication emergency
C	When the President's War Emergency Powers have been invoked
D	When they seize your equipment for use in disaster communications

8. - G2C04

What does the Q signal "QRL?" mean?

Select	Answer
A	"Are you busy?", or "Is this frequency in use?"
B	"Are you listening only for a specific station?"
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	All of these choices are correct
B	Date and time of contact
C	Call sign of station contacted and the signal report given
D	Band and/or frequency of the contact

10. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may be listening on the wrong sideband
B	All of these choices are correct
C	The mark and space frequencies may be reversed
D	You may have selected the wrong baud rate

11. - G3A05

What is the solar flux index?

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

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

13. - G3C12

Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?

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

14. - G4A03

What is normally meant by operating a transceiver in "split" mode?

Select	Answer
A	The transceiver is set to different transmit and receive frequencies
B	The transceiver is operating from an external power source
C	The radio is operating at half power
D	The transmitter is emitting an SSB signal, as opposed to DSB operation

15. - G4B07

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

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

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	The ground rod is resonant
B	Insulated wire has been used for the ground wire
C	Flat braid rather than round wire has been used for the ground wire
D	The ground wire has high impedance on that frequency

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	Increase transmitter bass response for more natural sounding SSB signals
C	Decrease high-frequency voice output to prevent out of band operation
D	Prevent distortion of voice signals

18. - G4E11

Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

Select	Answer
A	A large energy storage system is needed to supply power when the wind is not blowing
B	The voltage and current ratings of such systems are not compatible with amateur equipment
C	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent
D	All of these choices are correct

19. - G5A06

How does a capacitor react to AC?

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

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. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	Additional resistance must be added in series with the primary to prevent overload
B	The transformer no longer functions as it is a unidirectional device
C	The secondary voltage becomes 4 times the primary voltage
D	Additional resistance must be added in parallel with the secondary to prevent overload

22. - G6A05

What is the approximate junction threshold voltage of a conventional silicon diode?

Select	Answer
A	1.0 volts
B	0.7 volts
C	0.1 volt
D	0.3 volts

23. - G6B11

What is a microprocessor?

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

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Fewer circuit components are required
B	High frequency operation allows the use of smaller components
C	Faster switching time makes higher output voltage possible
D	All of these choices are correct

25. - G7B07

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

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

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	RF amplifier
B	Filter
C	IF amplifier
D	Carrier oscillator

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Phase modulation
C	Frequency shift keying
D	Frequency modulation

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	101.75 Hz
B	5 kHz
C	416.7 Hz
D	60 kHz

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	Mark and Space
B	High and Low
C	Dot and Dash
D	On and Off

30. - G9A08

If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?

Select	Answer
A	1 to 1
B	Between 1 to 1 and 5 to 1 depending on the characteristic impedance of the line
C	5 to 1
D	Between 1 to 1 and 5 to 1 depending on the reflected power at the transmitter

31. - G9B01

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

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

32. - G9C05

How does increasing boom length and adding directors affect a Yagi antenna?

Select	Answer
A	Gain increases
B	Front to side ratio decreases
C	Front to back ratio decreases
D	Beamwidth increases

33. - G9D10

Which of the following describes a Beverage antenna?

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

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Post a warning sign that is clearly visible to the neighbor
B	Use an antenna with a higher front-to-back ratio
C	Change to a non-polarized antenna with higher gain
D	Take precautions to ensure that the antenna cannot be pointed in their direction

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	RF energy can convert the lead into a poisonous gas
B	High voltages can cause lead-tin solder to disintegrate suddenly
C	Tin in the solder can "cold flow" causing shorts in the circuit
D	Lead can contaminate food if hands are not washed carefully after handling the solder