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	14005 kHz
B	14405 kHz
C	14305 kHz
D	14105 kHz

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	50 feet
B	100 feet
C	200 feet
D	300 feet

3. - G1C06

Which of the following is a limitation on transmitter power on the 1.8 MHz band?

Select	Answer
A	1500 watts PEP output
B	200 watts PEP output
C	1200 watts PEP output
D	1000 watts PEP output

4. - G1D04

Which of the following is a requirement for administering a Technician Class license examination?

Select	Answer
A	At least three General Class or higher VEs must observe the examination
B	At least two General Class or higher VEs must be present
C	At least two General Class or higher VEs must be present, but only one need be Extra Class
D	At least three VEs of Technician Class or higher must observe the examination

5. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The control operator of the interrogating station must hold an Extra Class license
B	The interrogating transmission must be made by another automatically controlled station
C	No third party traffic maybe be transmitted
D	The station initiating the contact must be under local or remote control

6. - G2A10

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

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

7. - G2B08

What is the "DX window" in a voluntary band plan?

Select	Answer
A	A portion of the band that should not be used for contacts between stations within the 48 contiguous United States
B	An FCC rule that allows only digital contacts in that portion of the band
C	An FCC rule that prohibits contacts between stations within the United States and possessions in that portion of the band
D	A portion of the band that has been voluntarily set aside for digital contacts only

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	We have worked before
B	I acknowledge receipt
C	We have already confirmed by card
D	Send slower

9. - G2D10

What is QRP operation?

Select	Answer
A	Transmission using Quick Response Protocol
B	Low power transmit operation
C	Traffic relay procedure net operation
D	Remote piloted model control

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send an email to the system control operator
B	Respond when the station broadcasts its SSID
C	Send QRL in Morse code
D	Transmit a connect message on the station's published frequency

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

Select	Answer
A	30 meters and 20 meters
B	80 meters and 160 meters
C	60 meters and 40 meters
D	15 meters, 12 meters and 10 meters

12. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24 hour period
B	The Longest Universal Function for communications between two points
C	The Lowest Usable Frequency for communications between two points
D	The Longest Universal Function during a 24 hour period

13. - G3C08

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

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

14. - G4A13

What is one reason to use the attenuator function that is present on many HF transceivers?

Select	Answer
A	To reduce the transmitter power when driving a linear amplifier
B	To reduce signal overload due to strong incoming signals
C	To slow down received CW signals for better copy
D	To reduce power consumption when operating from batteries

15. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The transmitter balanced mixer output
B	An external RF oscillator
C	The local oscillator of the transmitter
D	The attenuated RF output of the transmitter

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding an additional insulating jacket to the cable
B	Adding series capacitors to the conductors
C	Placing a ferrite choke around the cable
D	Adding shunt inductors to the conductors

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 to 14.647 MHz
B	14.344 to 14.347 MHz
C	14.347 to 14.350 MHz
D	14.3455 to 14.3485 MHz

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

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Admittance
C	Reactance
D	Reluctance

20. - G5B06

What is the output PEP from a transmitter if an oscilloscope measures 200 volts peak-to-peak across a 50 ohm dummy load connected to the transmitter output?

Select	Answer
A	1.4 watts
B	400 watts
C	100 watts
D	353.5 watts

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

22. - G6A14

Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?

Select	Answer
A	High stability
B	High capacitance for given volume
C	Comparatively low cost
D	Tight tolerance

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Beyond cutoff
B	Reverse Biased
C	Forward Biased
D	At the Zener voltage

24. - G7A05

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

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

25. - G7B05

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

Select	Answer
A	3
B	16
C	8
D	6

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	RF oscillator
B	Balanced modulator
C	Product detector
D	IF filter

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 convolution
C	Frequency conversion
D	Frequency transformation

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	5 kHz
B	101.75 Hz
C	60 kHz
D	416.7 Hz

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 transmitting redundant information with the data
C	By controlling transmitter output power for optimum signal strength
D	By using a parity bit with each character

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

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It decreases
B	It increases
C	It reaches a maximum at an angle of 45 degrees
D	It stays the same

32. - G9C20

What is meant by the terms dBi and dBd when referring to antenna gain?

Select	Answer
A	dBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna
B	dBi refers to an isometric antenna, dBd refers to a discone antenna
C	dBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna
D	dBi refers to an isotropic antenna, dBd refers to a dipole antenna

33. - G9D07

Which of the following describes a log periodic antenna?

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

34. - G0A09

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

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

35. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	Notify the electric company that a person will be working on the tower
B	All of these choices are correct
C	Unground the base of the tower
D	Make sure all circuits that supply power to the tower are locked out and tagged