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. - G1B09

When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?

Select	Answer
A	When other amateurs are being notified of the sale of any item with a monetary value less than $200 and such activity is not done on a regular basis
B	Only when there is no other means of communications readily available
C	When other amateurs are being notified of the sale of apparatus normally used in an amateur station and such activity is not done on a regular basis
D	Never

3. - G1C11

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

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

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	Technician only
B	General only
C	Extra, General and Technician
D	General and Technician

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	Under no circumstances
B	When under automatic control
C	When messages are encrypted
D	When messages are not encrypted

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	The received signal is more natural sounding
B	It occupies less bandwidth
C	It provides more power output
D	It allows "hands free" operation

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Acknowledge the station in distress and determine what assistance may be needed
B	Continue your communication because you were on the frequency first
C	Immediately cease all transmissions
D	Change to a different frequency

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Matching your transmit frequency to the frequency of a received signal
B	Matching the speed of the transmitting station
C	Sending without error
D	Operating split to avoid interference on frequency

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Identification of out of band operation
B	Identification of different call signs
C	Hunters have an opportunity to transmit on non-amateur frequencies
D	Direction finding used to locate stations violating FCC Rules

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	LSB
B	DSB
C	SSB
D	USB

11. - G3A12

What does the K-index indicate?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The solar radio flux at Boulder, Colorado
C	The short term stability of the Earth's magnetic field
D	The stability of the Sun's magnetic field

12. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	All of these choices are correct
B	Solar radiation and ionospheric disturbances
C	Path distance and location
D	Time of day and season

13. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The E-region is not present
B	The ionospheric layer involved is unstable
C	Ground waves are absorbing much of the signal
D	Energy is scattered into the skip zone through several different radio wave paths

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	ALC will invert the modulation of the AFSK mode
B	All of these choices are correct
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. - G4B07

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

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

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	You receive reports of harmonic interference from your station
C	An item of station equipment starts to draw excessive amounts of current
D	The SWR reading for one or more antennas is suddenly very high

17. - G4D01

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

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

18. - G4E01

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

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

19. - G5A08

Why is impedance matching important?

Select	Answer
A	So the load will draw minimum power from the source
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	To ensure that there is less resistance than reactance in the circuit

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 61 watts
B	Approximately 11 milliwatts
C	Approximately 11 watts
D	Approximately 61 milliwatts

21. - G5C02

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

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

22. - G6A09

Which of the following describes the construction of a MOSFET?

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

23. - G6B09

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

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

24. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	270 degrees
B	90 degrees
C	360 degrees
D	180 degrees

25. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	All of these choices are correct
B	AM
C	SSB
D	CW

26. - G7C11

What is meant by the term "software defined radio" (SDR)?

Select	Answer
A	A radio in which most major signal processing functions are performed by software
B	A radio that provides computer interface for automatic logging of band and frequency
C	A computer model that can simulate performance of a radio to aid in the design process
D	A radio that uses crystal filters designed using software

27. - G8A06

What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?

Select	Answer
A	Audio fidelity is improved
B	Greater modulation percentage is obtainable with lower distortion
C	Simpler receiving equipment can be used
D	Available transmitter power can be used more effectively

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. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?

Select	Answer
A	Encoding reverts to the default character set
B	The checksum overflows
C	The connection is dropped
D	Packets will be routed incorrectly

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The distance between the centers of the conductors and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The frequency of the signal and the length of the line

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	At the center of the antenna
B	As high as possible above the ground
C	Parallel to the antenna element
D	On the surface of the Earth or buried a few inches below the ground

32. - G9C13

Approximately how long is each side of the driven element of a quad antenna?

Select	Answer
A	1 wavelength
B	1/4 wavelength
C	1/2 wavelength
D	3/4 wavelength

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Polarization diversity
B	Higher gain per element than a Yagi antenna
C	Harmonic suppression
D	Wide bandwidth

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

35. - G0B05

Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?

Select	Answer
A	All of these choices are correct
B	Current flowing from one or more of the voltage-carrying wires directly to ground
C	Overvoltage on the voltage-carrying wires
D	Current flowing from one or more of the voltage-carrying wires to the neutral wire