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	Region 1
B	All three regions
C	Region 2
D	Region 3

2. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	10 watts PEP output
B	100 watts PEP output
C	200 watts PEP output
D	20 watts PEP output

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

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

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Only messages for other licensed amateurs
B	Any messages, as long as the text of the message is recorded in the station log
C	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
D	Any message, as long as the amateur operator is not paid

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	The caller is listening for a station in Germany
B	A distress call
C	A general call for any station
D	The caller is looking for any station outside their own country

7. - G2B11

What frequency should be used to send a distress call?

Select	Answer
A	Only frequencies authorized for RACES or ARES stations
B	Only frequencies used by police, fire or emergency medical services
C	Whichever frequency has the best chance of communicating the distress message
D	Only frequencies that are within your operating privileges

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Listening for novice stations
B	Closing station now
C	Listening only for a specific station or stations
D	Operating full break-in

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	Date and time of contact
B	Band and/or frequency of the contact
C	Call sign of station contacted and the signal report given
D	All of these choices are correct

10. - G2E12

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is vertical, signal strength is horizontal, time is intensity
B	Frequency is vertical, signal strength is intensity, time is horizontal
C	Frequency is horizontal, signal strength is vertical, time is intensity
D	Frequency is horizontal, signal strength is intensity, time is vertical

11. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A temporary disturbance in the Earth's magnetosphere
B	A thunderstorm which affects radio propagation
C	Ripples in the ionosphere
D	A sudden drop in the solar flux index

12. - G3B07

What does LUF stand for?

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

13. - G3C03

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

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

14. - G4A05

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

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

15. - G4B09

Which of the following can be determined with a field strength meter?

Select	Answer
A	The radiation pattern of an antenna
B	The presence and amount of amplitude distortion of a transmitter
C	The radiation resistance of an antenna
D	The presence and amount of phase distortion of a transmitter

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	The DSP filter is much more effective at VHF frequencies
C	Mixing products are greatly reduced
D	A wide range of filter bandwidths and shapes can be created

17. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.1765 to 7.1795 MHz
B	7.178 to 7.184 MHz
C	7.175 to 7.178 MHz
D	7.178 to 7.181 MHz

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The antenna system
B	FCC rules limiting mobile output power on the 75-meter band
C	The wire gauge of the DC power line to the transceiver
D	"Picket Fencing" signal variation

19. - G5A13

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	All of these choices are correct
B	A Pi-network
C	A length of transmission line
D	A transformer

20. - G5B03

How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?

Select	Answer
A	200 watts
B	0.5 watts
C	400 watts
D	3200 watts

21. - G5C06

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

Select	Answer
A	540 volts
B	5.9 volts
C	2370 volts
D	26.7 volts

22. - G6A05

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

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

23. - G6B05

What is meant when memory is characterized as non-volatile?

Select	Answer
A	It is resistant to high temperatures
B	It is resistant to radiation damage
C	The stored information cannot be changed once written
D	The stored information is maintained even if power is removed

24. - G7A09

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

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

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is low only when both inputs are high

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Detector
B	Discriminator
C	Balanced modulator
D	IF amplifier

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's automatic level control (ALC) is properly adjusted
B	The transmitter's carrier is properly suppressed
C	Signal distortion caused by excessive drive
D	Signal distortion caused by insufficient collector current

28. - G8B03

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

Select	Answer
A	Synthesizing
B	Cancellation
C	Heterodyning
D	Phase inverting

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	Dot and Dash
D	High and Low

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

31. - G9B12

What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?

Select	Answer
A	21 feet
B	11 feet
C	8 feet
D	16 feet

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

Select	Answer
A	Approximately 1.5 dB higher
B	Approximately 3 dB higher
C	Approximately 9 dB higher
D	Approximately 6 dB higher

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	Its impedance is too low for effective matching
B	It has poor directivity
C	It has high losses compared to other types of antennas
D	All of these choices are correct

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	A lower transmitter duty cycle permits greater short-term exposure levels
B	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
C	High duty cycle transmitters are exempt from RF exposure requirements
D	A higher transmitter duty cycle permits greater short-term exposure levels

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	Solder flux will prevent a low conductivity connection
B	The resistance of solder is too high
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	Solder has too high a dielectric constant to provide adequate lightning protection

Figure G7-1