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. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	30 meters
B	12 meters
C	20 meters
D	160 meters

2. - G1B12

Who or what determines "good engineering and good amateur practice" as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The ITU
B	The IEEE
C	The FCC
D	The Control Operator

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	300 baud
D	19.6 kilobaud

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	There is no age limit
B	21 years
C	18 years
D	12 years

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Robotically controlled station
B	Locally controlled station
C	Automatically controlled digital station
D	Fail-safe digital station

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Lower sideband is more efficient than upper sideband at these frequencies
C	Current amateur practice is to use lower sideband on these frequency bands
D	Because it is fully compatible with an AM detector

7. - G2B12

When is an amateur station allowed to use any means at its disposal to assist another station in distress?

Select	Answer
A	Only when transmitting in RACES
B	At any time when transmitting in an organized net
C	At any time during an actual emergency
D	Only on authorized HF frequencies

8. - G2C03

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

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

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To provide emergency and public safety communications
B	To conduct efficient and orderly amateur licensing examinations
C	To coordinate repeaters for efficient and orderly spectrum usage
D	To encourage self-regulation and compliance with the rules by radio amateur operators

10. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	850 Hz
B	85 Hz
C	170 Hz
D	425 Hz

11. - G3A12

What does the K-index indicate?

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

12. - G3B08

What does MUF stand for?

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

13. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A left-hand circularly polarized antenna
B	A right-hand circularly polarized antenna
C	A vertical antenna
D	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A pronounced peak
B	A pronounced dip
C	A slow, rhythmic oscillation
D	No change will be observed

15. - G4B09

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

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

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	On-and-off humming or clicking
B	Distorted speech
C	A steady hum whenever the transmitter is on the air
D	Clearly audible speech

17. - G4D04

What does an S meter measure?

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

18. - G4E07

Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?

Select	Answer
A	All of these choices are correct
B	The battery charging system
C	The vehicle control computer
D	The fuel delivery system

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 transformer
C	A length of transmission line
D	A Pi-network

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 61 milliwatts
B	Approximately 61 watts
C	Approximately 11 watts
D	Approximately 11 milliwatts

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	0.07 microfarads
B	70 microfarads
C	14.3 microfarads
D	1000 microfarads

22. - G6A10

Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Heater
C	Screen Grid
D	Control grid

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Power supply and amplifier
B	Microphone and transceiver
C	Amplifier and antenna
D	Computer and transceiver

24. - G7A07

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

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

25. - G7B04

Which of the following describes the function of a two input NOR gate?

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

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	Balanced modulator
B	IF filter
C	Product detector
D	RF oscillator

27. - G8A02

What is the name of the process that changes the phase angle of an RF wave to convey information?

Select	Answer
A	Angle convolution
B	Radian inversion
C	Phase modulation
D	Phase convolution

28. - G8B03

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

Select	Answer
A	Cancellation
B	Phase inverting
C	Heterodyning
D	Synthesizing

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	High and Low
B	Dot and Dash
C	On and Off
D	Mark and Space

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The frequency of the signal and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The distance between the centers of the conductors and the radius of the conductors

31. - G9B11

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

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

32. - G9C08

What is meant by the "main lobe" of a directive antenna?

Select	Answer
A	The maximum voltage standing wave point on a radiating element
B	The magnitude of the maximum vertical angle of radiation
C	The point of maximum current in a radiating antenna element
D	The direction of maximum radiated field strength from the antenna

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Non-Varying Impedance Smoothing
B	Non-Varying Indicated SWR
C	Near Vertical Incidence sky-wave
D	Nearly Vertical Inductance System

34. - G0A09

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

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

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 16
B	AWG number 20
C	AWG number 8
D	AWG number 12