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. - G1A14

In what ITU region is operation in the 7.175 to 7.300 MHz band permitted for a control operator holding an FCC issued General Class license?

Select	Answer
A	All three regions
B	Region 3
C	Region 1
D	Region 2

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	At any time, as long as it produces no spurious emissions
B	When it is transmitted on frequencies above 1215 MHz
C	When it is an incidental part of a manned space craft retransmission
D	When it is unintentionally transmitted from the background at the transmitter

3. - G1C01

What is the maximum transmitting power an amateur station may use on 10.140 MHz?

Select	Answer
A	2000 watts PEP output
B	1000 watts PEP output
C	1500 watts PEP output
D	200 watts PEP output

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	For as long as your current license is valid
D	365 days

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

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

7. - G2B01

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

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

8. - G2C06

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

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

9. - G2D01

What is the Amateur Auxiliary to the FCC?

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

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.275 - 14.350 MHz
B	14.070 - 14.100 MHz
C	14.000 - 14.050 MHz
D	14.150 - 14.225 MHz

11. - G3A12

What does the K-index indicate?

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

12. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency during a 24 hour period
B	The Minimum Usable Frequency for communications between two points
C	The Maximum Usable Frequency for communications between two points
D	The Minimum Usable Frequency during a 24 hour period

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagations is through ducts in F region which absorb most of the energy
B	Propagation is through ground waves which absorb most of the signal energy
C	Signals are scattered from the magnetosphere which is not a good reflector
D	Only a small part of the signal energy is scattered into the skip zone

14. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To reduce distortion due to excessive drive
C	To reduce harmonic radiation
D	To balance the transmitter audio frequency response

15. - G4B13

What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Select	Answer
A	Measuring the front to back ratio of an antenna
B	Determining the impedance of an unknown or unmarked coaxial cable
C	Measuring the turns ratio of a power transformer
D	Determining the gain of a directional antenna

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?

Select	Answer
A	On-and-off humming or clicking
B	A chirpy CW signal
C	Severely distorted audio
D	A CW signal at a nearly pure audio frequency

17. - G4D03

Which of the following can be the result of an incorrectly adjusted speech processor?

Select	Answer
A	Excessive background pickup
B	All of these choices are correct
C	Distorted speech
D	Splatter

18. - G4E01

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

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

19. - G5A05

How does an inductor react to AC?

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

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the sum of the currents through each branch
B	It equals the average of each branch current
C	It is the sum of the reciprocal of each individual voltage drop
D	It decreases as more parallel branches are added to the circuit

21. - G5C05

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

Select	Answer
A	150 ohms
B	175 ohms
C	90 ohms
D	1500 ohms

22. - G6A16

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

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

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A special watertight connector for use in marine applications
B	A DC power connector rated for currents between 30 and 50 amperes
C	A family of multiple circuit connectors suitable for audio and control signals
D	A special connector for microwave interfacing

24. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 5
B	Symbol 1
C	Symbol 4
D	Symbol 2

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The inductance and capacitance in the tank circuit
C	The time delay of the lag circuit
D	The number of stages in the counter

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. - G8A01

How is an FSK signal generated?

Select	Answer
A	By changing an oscillator's frequency directly with a digital control signal
B	By reconfiguring the CW keying input to act as a tone generator
C	By keying an FM transmitter with a sub-audible tone
D	By using a transceiver's computer data interface protocol to change frequencies

28. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Intermediate interference
B	Image response
C	Mixer interference
D	Quadrature noise

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Binary
C	Viterbi
D	Varicode

30. - G9A12

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 25 ohm impedance?

Select	Answer
A	2.5:1
B	1.25:1
C	2:1
D	You cannot determine SWR from impedance values

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower feed point impedance
B	Lower radiation resistance
C	Lower ground reflection losses
D	Shorter Radials

32. - G9C11

What is the purpose of a gamma match used with Yagi antennas?

Select	Answer
A	To increase the front-to-back ratio
B	To match the relatively low feed point impedance to 50 ohms
C	To match the relatively high feed point impedance to 50 ohms
D	To increase the main lobe gain

33. - G9D06

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

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

34. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on computer modeling
B	By calculation based on FCC OET Bulletin 65
C	By measurement of field strength using calibrated equipment
D	All of these choices are correct

35. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut off the power supply if too much voltage is produced
B	To prevent unauthorized changes to the circuit that would void the manufacturer's warranty
C	To shut down the unit if it becomes too hot
D	To ensure that dangerous voltages are removed if the cabinet is opened

Figure G7-1