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. - G1A10

Which of the following frequencies is available to a control operator holding a General Class license?

Select	Answer
A	28.550 MHz
B	28.350 MHz
C	28.020 MHz
D	All of these choices are correct

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be coordinated with the National Beacon Organization
B	A beacon station may not use automatic control
C	There must be no more than one beacon signal transmitting in the same band from the same station location
D	The frequency must be posted on the Internet or published in a national periodical

3. - G1C05

Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1000 watts PEP output
B	2000 watts PEP output
C	1500 watts PEP output
D	100 watts PEP output

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	On any General or Technician Class band segment
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician Class band segment except 30-meters and 60-meters
D	Only on the Technician band segments until your license arrives in the mail

5. - G1E04

Which of the following conditions require a licensed Amateur Radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	When a station is transmitting spread spectrum emissions
C	When operating within one mile of an FCC Monitoring Station
D	All of these choices are correct

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Current amateur practice is to use lower sideband on these frequency bands
C	Lower sideband is more efficient than upper sideband at these frequencies
D	Because it is fully compatible with an AM detector

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	As a common courtesy, move your contact to another frequency
B	Tell the interfering stations to change frequency
C	Increase power to overcome interference
D	Report the interference to your local Amateur Auxiliary Coordinator

8. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The fastest speed at which you are comfortable copying
B	A slow speed until contact is established
C	The speed at which the CQ was sent
D	At the standard calling speed of 5 wpm

9. - G2D11

Which HF antenna would be the best to use for minimizing interference?

Select	Answer
A	A quarter-wave vertical antenna
B	An omnidirectional antenna
C	A directional antenna
D	An isotropic antenna

10. - G2E09

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

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

11. - G3A14

How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?

Select	Answer
A	VHF/UHF ducting is improved
B	VHF/UHF ducting is disturbed
C	HF communications are disturbed
D	HF communications are improved

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	No HF radio frequency will support ordinary sky-wave communications over the path
B	Double hop propagation along the path is more common
C	HF communications over the path are enhanced
D	Propagation over the path on all HF frequencies is enhanced

13. - G3C03

Why is the F2 region mainly responsible for the longest distance radio wave propagation?

Select	Answer
A	All of these choices are correct
B	Because it is the highest ionospheric region
C	Because it does not absorb radio waves as much as other ionospheric regions
D	Because it is the densest ionospheric layer

14. - G4A15

Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?

Select	Answer
A	Frequent connection timeouts
B	The VOX circuit does not un-key the transmitter
C	The transmitter signal is distorted
D	All of these choices are correct

15. - G4B06

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

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

16. - G4C13

Which of the following can perform automatic notching of interfering carriers?

Select	Answer
A	Balanced mixing
B	A noise limiter
C	A Digital Signal Processor (DSP) filter
D	Bandpass tuning

17. - G4D01

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

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

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photon emission
B	Photon decomposition
C	Photovoltaic conversion
D	Photosynthesis

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To reduce power supply ripple
B	To minimize transmitter power output
C	To maximize the transfer of power
D	To minimize radiation resistance

20. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	12 volts
B	34 volts
C	24 volts
D	8.5 volts

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	90 ohms
C	175 ohms
D	1500 ohms

22. - G6A09

Which of the following describes the construction of a MOSFET?

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

23. - G6B17

What is the general description of a DIN type connector?

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

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Transformers and transducers
B	Diodes
C	Capacitors and inductors
D	Quartz crystals

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 number of stages in the counter
D	The time delay of the lag circuit

26. - G7C06

What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

Select	Answer
A	Substantially lower
B	Substantially higher
C	Twice the transmission line impedance
D	About the same

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 automatic level control (ALC) is properly adjusted
C	Signal distortion caused by excessive drive
D	The transmitter's carrier is properly suppressed

28. - G8B03

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

Select	Answer
A	Heterodyning
B	Phase inverting
C	Synthesizing
D	Cancellation

29. - G8C11

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

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

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

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	42 feet
B	131 feet
C	263 feet
D	84 feet

32. - G9C08

What is meant by the "main lobe" of a directive antenna?

Select	Answer
A	The magnitude of the maximum vertical angle of radiation
B	The maximum voltage standing wave point on a radiating element
C	The point of maximum current in a radiating antenna element
D	The direction of maximum radiated field strength from the antenna

33. - G9D07

Which of the following describes a log periodic antenna?

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

34. - G0A09

What type of instrument can be used to accurately measure an RF field?

Select	Answer
A	A receiver with an S meter
B	An oscilloscope with a high-stability crystal marker generator
C	A calibrated field strength meter with a calibrated antenna
D	An SWR meter with a peak-reading function

35. - G0B06

Why must the metal enclosure of every item of station equipment be grounded?

Select	Answer
A	It ensures that the neutral wire is grounded
B	It prevents signal overload
C	It ensures that hazardous voltages cannot appear on the chassis
D	It prevents a blown fuse in the event of an internal short circuit