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. - G1A04

Which of the following amateur bands is restricted to communication on only specific channels, rather than frequency ranges?

Select	Answer
A	11 meters
B	12 meters
C	30 meters
D	60 meters

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be posted on the Internet or published in a national periodical
B	A beacon station may not use automatic control
C	The frequency must be coordinated with the National Beacon Organization
D	There must be no more than one beacon signal transmitting in the same band from the same station location

3. - G1C05

Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	2000 watts PEP output
B	100 watts PEP output
C	1000 watts PEP output
D	1500 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, but only one need be Extra Class
B	At least three General Class or higher VEs must observe the examination
C	At least three VEs of Technician Class or higher must observe the examination
D	At least two General Class or higher VEs must be present

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	When under automatic control
B	Under no circumstances
C	When messages are encrypted
D	When messages are not encrypted

6. - G2A03

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

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

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Continue your communication because you were on the frequency first
B	Immediately cease all transmissions
C	Acknowledge the station in distress and determine what assistance may be needed
D	Change to a different frequency

8. - G2C07

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

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

9. - G2D11

Which HF antenna would be the best to use for minimizing interference?

Select	Answer
A	A directional antenna
B	A quarter-wave vertical antenna
C	An omnidirectional antenna
D	An isotropic antenna

10. - G2E08

In what segment of the 20-meter band are most PSK31 operations commonly found?

Select	Answer
A	Below the RTTY segment, near 14.070 MHz
B	In the middle of the CW segment, near 14.100 MHz
C	At the top of the SSB phone segment, near 14.325 MHz
D	At the bottom of the slow-scan TV segment, near 14.230 MHz

11. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from solar flares to affect radio propagation on the Earth?

Select	Answer
A	28 days
B	1 to 2 hours
C	8 minutes
D	20 to 40 hours

12. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency during a 24 hour period
B	The Minimum Usable Frequency for communications between two points
C	The Minimum Usable Frequency during a 24 hour period
D	The Maximum Usable Frequency for communications between two points

13. - G3C10

Which of the following might be an indication that signals heard on the HF bands are being received via scatter propagation?

Select	Answer
A	The signal is heard on a frequency above the Maximum Usable Frequency
B	The signal is heard on a frequency below the Maximum Usable Frequency
C	The communication is during a sunspot maximum
D	The communication is during a sudden ionospheric disturbance

14. - G4A10

What is the purpose of an electronic keyer?

Select	Answer
A	Automatic generation of strings of dots and dashes for CW operation
B	Automatic transmit/receive switching
C	Computer interface for PSK and RTTY operation
D	VOX operation

15. - G4B03

Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

Select	Answer
A	A wavemeter
B	A sidetone monitor
C	A field strength meter
D	An oscilloscope

16. - G4C13

Which of the following can perform automatic notching of interfering carriers?

Select	Answer
A	Balanced mixing
B	A noise limiter
C	Bandpass tuning
D	A Digital Signal Processor (DSP) filter

17. - G4D04

What does an S meter measure?

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

18. - G4E05

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

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

19. - G5A04

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

Select	Answer
A	Admittance
B	Conductance
C	Reluctance
D	Reactance

20. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak-to-peak value
B	The reciprocal of the RMS value
C	The RMS value
D	The peak value

21. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Mutual inductance
B	Capacitive coupling
C	Mutual capacitance
D	Displacement current coupling

22. - G6A09

Which of the following describes the construction of a MOSFET?

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

23. - G6B11

What is a microprocessor?

Select	Answer
A	A low voltage amplifier used in a microwave transmitter modulator stage
B	A low power analog signal processor used as a microwave detector
C	A computer on a single integrated circuit
D	A microwave detector, amplifier, and local oscillator on a single integrated circuit

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	One-quarter the normal output voltage of the power supply
B	Equal to the normal peak output voltage of the power supply
C	Half the normal output voltage of the power supply
D	Double the normal peak output voltage of the power supply

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	Low distortion
B	High Efficiency
C	Low standby power
D	No need for bias

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	Detector
B	IF amplifier
C	Balanced modulator
D	Mixer

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. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To aid in tuning your transmitter
B	Some modes have high duty cycles which could exceed the transmitter's average power rating.
C	To allow time for the other station to break in during a transmission
D	All of these choices are correct

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Viterbi
B	Volumetric
C	Binary
D	Varicode

30. - G9A09

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?

Select	Answer
A	2:1
B	4:1
C	1:2
D	1:4

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	84 feet
C	131 feet
D	42 feet

32. - G9C19

How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	dBi gain figures are 2.15 dB lower then dBd gain figures
B	dBi gain figures are the same as the square root of dBd gain figures multiplied by 2.15
C	dBi gain figures are 2.15 dB higher than dBd gain figures
D	dBi gain figures are the reciprocal of dBd gain figures + 2.15 dB

33. - G9D04

What is the primary purpose of antenna traps?

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

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes the blood count to reach a dangerously low level
B	It causes radiation poisoning
C	It cools body tissue
D	It heats body tissue

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	Only the two wires carrying voltage
B	Only the ground wire
C	Only the neutral wire
D	All wires