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. - G1A05

Which of the following frequencies is in the General Class portion of the 40-meter band?

Select	Answer
A	7.500 MHz
B	40.500 MHz
C	40.200 MHz
D	7.250 MHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only when the information is of a routine, personal nature
B	To control a space station
C	During a declared communications emergency
D	Only with Special Temporary Authorization from the FCC

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Wireless Telecommunications Bureau
C	The Federal Communications Commission
D	A Volunteer Examiner Coordinator

5. - G1E08

Which of the following is a requirement for a non-licensed person to communicate with a foreign Amateur Radio station from a station with an FCC-granted license at which an FCC licensed control operator is present?

Select	Answer
A	The control operator must have at least a General Class license
B	The foreign amateur station must be in a country with which the United States has a third party agreement
C	All of these choices are correct
D	Information must be exchanged in English

6. - G2A03

Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?

Select	Answer
A	Double sideband
B	Upper sideband
C	Lower sideband
D	Vestigial sideband

7. - G2B01

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

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

8. - G2C02

What should you do if a CW station sends "QRS"?

Select	Answer
A	Send slower
B	Repeat everything twice
C	Increase your power
D	Change frequency

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Identification of different call signs
B	Identification of out of band operation
C	Direction finding used to locate stations violating FCC Rules
D	Hunters have an opportunity to transmit on non-amateur frequencies

10. - G2E12

Which of the following describes a waterfall display?

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

11. - G3A13

What does the A-index indicate?

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

12. - G3B07

What does LUF stand for?

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

13. - G3C01

Which ionospheric layer is closest to the surface of the Earth?

Select	Answer
A	The D layer
B	The E layer
C	The F2 layer
D	The F1 layer

14. - G4A08

What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum plate current without exceeding maximum allowable grid current
B	Minimum SWR on the antenna
C	Highest plate voltage while minimizing grid current
D	Maximum power output without exceeding maximum allowable plate current

15. - G4B13

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

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

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Reverse-biased diode
B	Bypass capacitor
C	Forward-biased diode
D	Bypass inductor

17. - G4D04

What does an S meter measure?

Select	Answer
A	Conductance
B	Transmitter power output
C	Received signal strength
D	Impedance

18. - G4E10

What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	The diode prevents self-discharge of the battery though the panel during times of low or no illumination
B	The diode greatly increases the efficiency during times of high illumination
C	The diode serves to regulate the charging voltage to prevent overcharge
D	The diode limits the current flowing from the panel to a safe value

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	No current can flow through the circuit
B	The source delivers minimum power to the load
C	The source can deliver maximum power to the load
D	The electrical load is shorted

20. - G5B13

What is the output PEP of an unmodulated carrier if an average reading wattmeter connected to the transmitter output indicates 1060 watts?

Select	Answer
A	530 watts
B	2120 watts
C	1500 watts
D	1060 watts

21. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

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

22. - G6A04

When is it acceptable to recharge a carbon-zinc primary cell?

Select	Answer
A	When the cell is kept warm during the recharging period
B	Never
C	When a constant current charger is used
D	As long as the voltage has not been allowed to drop below 1.0 volt

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Longer life
B	Faster response time
C	Lower power consumption
D	All of these choices are correct

24. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 11
B	Symbol 1
C	Symbol 6
D	Symbol 7

25. - G7B09

What determines the frequency of an LC oscillator?

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

26. - G7C03

What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?

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

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Frequency modulation
B	Double sideband
C	Phase modulation
D	Single sideband

28. - G8B03

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

Select	Answer
A	Cancellation
B	Heterodyning
C	Phase inverting
D	Synthesizing

29. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?

Select	Answer
A	The connection is dropped
B	Encoding reverts to the default character set
C	The checksum overflows
D	Packets will be routed incorrectly

30. - G9A15

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Transmission line loss does not affect the SWR measurement
B	The higher the transmission line loss, the more the SWR will read artificially high
C	The higher the transmission line loss, the more the SWR will read artificially low
D	The higher the transmission line loss, the more accurate the SWR measurement will be

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength above ground
C	It is unaffected by the height above ground
D	It steadily increases

32. - G9C15

Approximately how long is each side of the reflector element of a quad antenna?

Select	Answer
A	Slightly less than 1/2 wavelength
B	Slightly more than 1/4 wavelength
C	Slightly less than 1/4 wavelength
D	Slightly more than 1/2 wavelength

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
B	All of these choices are correct
C	High vertical angle radiation for working stations within a radius of a few hundred kilometers
D	High forward gain

34. - G0A09

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

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

35. - G0B02

What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?

Select	Answer
A	AWG number 20
B	AWG number 8
C	AWG number 12
D	AWG number 16

Figure G7-1