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. - G1A11

When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The upper frequency end
B	The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
C	The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz
D	The lower frequency end

2. - G1B10

What is the power limit for beacon stations?

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

3. - G1C03

What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	2.8 kHz
B	1.8 kHz
C	3 kHz
D	5.6 kHz

4. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?

Select	Answer
A	Whenever you operate on any amateur frequency
B	A special identifier is not required as long as your General Class license application has been filed with the FCC
C	Whenever you operate using General Class frequency privileges
D	Whenever you operate using Technician frequency privileges

5. - G1E05

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

Select	Answer
A	Any message, as long as the amateur operator is not paid
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	Only messages for other licensed amateurs

6. - G2A11

What does the expression "CQ DX" usually indicate?

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

7. - G2B01

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

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

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	Key clicks
B	100 percent copy
C	Report was read from an S meter rather than estimated
D	Chirpy or unstable signal

9. - G2D07

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third party traffic
B	You must keep a record of the manufacturer of your equipment and the antenna used
C	You must keep a record of the date, time, frequency, power level and stations worked
D	If you are using other than a dipole antenna, you must keep a record of the gain of your antenna

10. - G2E02

How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?

Select	Answer
A	Transmit UI packets several times and wait to see if there is a response from another PACTOR station
B	Send the message: "Is this frequency in use?"
C	Put the modem or controller in a mode which allows monitoring communications without a connection
D	Unplug the data connector temporarily and see if the channel-busy indication is turned off

11. - G3A14

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

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

12. - G3B07

What does LUF stand for?

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

13. - G3C09

What type of radio wave propagation allows a signal to be detected at a distance too far for ground wave propagation but too near for normal sky-wave propagation?

Select	Answer
A	Faraday rotation
B	Sporadic-E skip
C	Short-path skip
D	Scatter

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Balanced modulator
B	Antenna coupler or antenna tuner
C	SWR Bridge
D	Q Multiplier

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A Q meter
B	An antenna noise bridge
C	A field strength meter
D	A multimeter

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	Insulated wire has been used for the ground wire
B	The ground wire has high impedance on that frequency
C	Flat braid rather than round wire has been used for the ground wire
D	The ground rod is resonant

17. - G4D06

Where is an S meter found?

Select	Answer
A	In an SWR bridge
B	In a conductance bridge
C	In a transmitter
D	In a receiver

18. - G4E01

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

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

19. - G5A07

What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?

Select	Answer
A	The electrical load is shorted
B	The source can deliver maximum power to the load
C	The source delivers minimum power to the load
D	No current can flow through 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 11 milliwatts
B	Approximately 61 watts
C	Approximately 11 watts
D	Approximately 61 milliwatts

21. - G5C03

Which of the following components should be added to an existing resistor to increase the resistance?

Select	Answer
A	A capacitor in series
B	A resistor in parallel
C	A capacitor in parallel
D	A resistor in series

22. - G6A09

Which of the following describes the construction of a MOSFET?

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

23. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Programmable Logic
B	Analog
C	MMIC
D	Digital

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	High frequency operation allows the use of smaller components
B	All of these choices are correct
C	Fewer circuit components are required
D	Faster switching time makes higher output voltage possible

25. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	An analog mixer
C	An array of operational amplifiers used for tri-state arithmetic operations
D	A digital mixer

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Wide tuning range and no need for band switching
B	Relatively low power consumption
C	Relatively high power output
D	Variable frequency with the stability of a crystal oscillator

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Frequency modulation
C	Frequency shift keying
D	Phase modulation

28. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Pre-emphasis network
B	Mixer
C	Reactance modulator
D	Multiplier

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By using a parity bit with each character
B	By controlling transmitter output power for optimum signal strength
C	By using the varicode character set
D	By transmitting redundant information with the data

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. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	8 feet
B	24 feet
C	32 feet
D	16 feet

32. - G9C17

Approximately how long is each leg of a symmetrical delta-loop antenna?

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

33. - G9D09

Which of the following is an application for a Beverage antenna?

Select	Answer
A	Directional transmitting for low HF bands
B	Directional receiving for low HF bands
C	Portable direction finding at higher HF frequencies
D	Portable direction finding at lower HF frequencies

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	Wear a radiation badge
B	All of these choices are correct
C	Ensure that you and the antenna structure are grounded
D	Turn off the transmitter and disconnect the feed line

35. - G0B12

What is the purpose of a power supply interlock?

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