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	14305 kHz
B	14405 kHz
C	14005 kHz
D	14105 kHz

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	The frequency must be posted on the Internet or published in a national periodical
D	There must be no more than one beacon signal transmitting in the same band from the same station location

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	1000 watts PEP output
C	1200 watts PEP output
D	200 watts PEP output

4. - G1D04

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

Select	Answer
A	At least two General Class or higher VEs must be present
B	At least three General Class or higher VEs must observe the examination
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. - G1E06

Which of the following applies in the event of interference between a coordinated repeater and an uncoordinated repeater?

Select	Answer
A	The licensee of the uncoordinated repeater has primary responsibility to resolve the interference
B	The frequency coordinator bears primary responsibility to resolve the interference
C	Both repeater licensees share equal responsibility to resolve the interference
D	The licensee of the coordinated repeater has primary responsibility to resolve the interference

6. - G2A07

Which of the following statements is true of the single sideband voice mode?

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
C	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands
D	Only one sideband and the carrier are transmitted; the other sideband is suppressed

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	Only frequencies that are within your operating privileges
D	Whichever frequency has the best chance of communicating the distress message

8. - G2C09

What does the Q signal "QSL" mean?

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

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	The ITU requires a log of all international third party traffic
B	The log provides evidence of operation needed to renew a license without retest
C	To help with a reply if the FCC requests information
D	The ITU requires a log of all international contacts

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 horizontal, signal strength is vertical, time is intensity
C	Frequency is vertical, signal strength is intensity, time is horizontal
D	Frequency is horizontal, signal strength is intensity, time is vertical

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	A zero sunspot number indicate radio propagation is not possible on any band
B	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
C	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
D	All of these choices are correct.

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Listen for signals from an international beacon in the frequency range you plan to use
B	Send a series of dots on the band and listen for echoes from your signal
C	Check the strength of signals in the MF AM broadcast band
D	Check the strength of TV signals from Western Europe

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
C	The long path azimuth of a distant station
D	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions

14. - G4A08

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

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

15. - G4B13

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

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

16. - G4C07

What is one good way to avoid unwanted effects of stray RF energy in an amateur station?

Select	Answer
A	Connect all equipment grounds together
B	Install a few ferrite beads on the ground wire where it connects to your station
C	Install an RF filter in series with the ground wire
D	Use a ground loop for best conductivity

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

Select	Answer
A	It increases average power
B	It reduces harmonic distortion
C	It reduces intermodulation distortion
D	It increases peak power

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the alternator or generator using heavy gauge wire
B	To the battery using heavy gauge wire
C	To the alternator or generator using resistor wire
D	To the battery using resistor wire

19. - G5A04

Which of the following causes opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Admittance
B	Reluctance
C	Reactance
D	Conductance

20. - G5B09

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

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

21. - G5C04

What is the total resistance of three 100 ohm resistors in parallel?

Select	Answer
A	0.30 ohms
B	300 ohms
C	0.33 ohms
D	33.3 ohms

22. - G6A18

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	The magnetic properties of the core may be optimized for a specific range of frequencies
B	All of these choices are correct
C	Most of the magnetic field is contained in the core
D	Large values of inductance may be obtained

23. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Better suited for power supply regulation
B	Better suited for RF amplification
C	High power handling capability
D	Low power consumption

24. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A steady DC voltage
B	A sine wave at half the frequency of the AC input
C	A series of DC pulses at twice the frequency of the AC input
D	A series of DC pulses at the same frequency as the AC input

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	A digital mixer
D	An array of operational amplifiers used for tri-state arithmetic operations

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	Balanced modulator
B	IF amplifier
C	Detector
D	Mixer

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient audio
B	Frequency drift
C	Insufficient bandwidth
D	Excessive bandwidth

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Lower symbol rates require wider bandwidth
B	Higher symbol rates require wider bandwidth
C	Symbol rate and bandwidth are not related
D	Bandwidth is always half the symbol rate

29. - G8C05

In the PACTOR protocol, what is meant by an NAK response to a transmitted packet?

Select	Answer
A	The receiver is reporting the packet was received without error
B	The receiver is busy decoding the packet
C	The entire file has been received correctly
D	The receiver is requesting the packet be retransmitted

30. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 1000 feet
B	Ohms per 1000 feet
C	Ohms per 100 feet
D	Decibels per 100 feet

31. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It peaks at about 1/8 wavelength from the end
B	It is unaffected by the location of the feed point
C	It steadily increases
D	It steadily decreases

32. - G9C14

How does the forward gain of a two-element quad antenna compare to the forward gain of a three-element Yagi antenna?

Select	Answer
A	About twice as much
B	About 2/3 as much
C	About 1.5 times as much
D	About the same

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To provide balanced feed point impedance
B	To notch spurious frequencies
C	To prevent out of band operation
D	To permit multiband operation

34. - G0A05

What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?

Select	Answer
A	All of these choices are correct
B	File an Environmental Impact Statement (EIS-97) with the FCC
C	Take action to prevent human exposure to the excessive RF fields
D	Secure written permission from your neighbors to operate above the controlled MPE limits

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Tin in the solder can "cold flow" causing shorts in the circuit
B	High voltages can cause lead-tin solder to disintegrate suddenly
C	Lead can contaminate food if hands are not washed carefully after handling the solder
D	RF energy can convert the lead into a poisonous gas