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	20 meters
B	12 meters
C	160 meters
D	30 meters

2. - G1B08

When choosing a transmitting frequency, what should you do to comply with good amateur practice?

Select	Answer
A	Insure that the frequency and mode selected are within your license class privileges
B	Monitor the frequency before transmitting
C	All of these choices are correct
D	Follow generally accepted band plans agreed to by the Amateur Radio community

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Only the minimum power necessary to carry out the desired communications should be used
B	Effective radiated power cannot exceed 1500 watts
C	Power should be limited as necessary to avoid interference to another radio service on the frequency
D	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz

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 two General Class or higher VEs must be present
C	At least three General Class or higher VEs must observe the examination
D	At least three VEs of Technician Class or higher must observe the examination

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Only during an FCC declared general state of communications emergency
B	Under no circumstances
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Only if the 10-meter repeater control operator holds at least a General Class license

6. - G2A08

Which of the following is a recommended way to break into a contact when using phone?

Select	Answer
A	Say "Break Break Break" and wait for a response
B	Say your call sign during a break between transmissions by the other stations
C	Say "CQ" followed by the call sign of either station
D	Say "QRZ" several times followed by your call sign

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

8. - G2C07

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

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

9. - G2D11

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

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

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send an email to the system control operator
B	Respond when the station broadcasts its SSID
C	Send QRL in Morse code
D	Transmit a connect message on the station's published frequency

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

Select	Answer
A	80 meters and 160 meters
B	15 meters, 12 meters and 10 meters
C	30 meters and 20 meters
D	60 meters and 40 meters

12. - G3B07

What does LUF stand for?

Select	Answer
A	The Longest Universal Function for communications between two points
B	The Lowest Usable Frequency for communications between two points
C	The Lowest Usable Frequency during a 24 hour period
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 E layer
B	The F1 layer
C	The D layer
D	The F2 layer

14. - G4A02

What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

Select	Answer
A	It may be possible to reduce or eliminate interference from other signals
B	More stations can be accommodated within a given signal passband
C	Accidental out of band operation can be prevented
D	Interference from impulse noise will be eliminated

15. - G4B12

What problem can occur when making measurements on an antenna system with an antenna analyzer?

Select	Answer
A	Connecting the analyzer to an antenna can cause it to absorb harmonics
B	Permanent damage to the analyzer may occur if it is operated into a high SWR
C	Strong signals from nearby transmitters can affect the accuracy of measurements
D	The analyzer can be damaged if measurements outside the ham bands are attempted

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?

Select	Answer
A	A CW signal at a nearly pure audio frequency
B	Severely distorted audio
C	A chirpy CW signal
D	On-and-off humming or clicking

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Decrease high-frequency voice output to prevent out of band operation
B	Increase transmitter bass response for more natural sounding SSB signals
C	Prevent distortion of voice signals
D	Increase the intelligibility of transmitted phone signals during poor conditions

18. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full size antenna?

Select	Answer
A	Harmonic radiation may increase
B	Short antennas are more likely to cause distortion of transmitted signals
C	Short antennas can only receive circularly polarized signals
D	Operating bandwidth may be very limited

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 61 watts
B	Approximately 11 milliwatts
C	Approximately 11 watts
D	Approximately 61 milliwatts

21. - G5C04

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

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

22. - G6A15

Which of the following is an advantage of an electrolytic capacitor?

Select	Answer
A	Much less leakage than any other type
B	Tight tolerance
C	High capacitance for a given volume
D	Inexpensive RF capacitor

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A special watertight connector for use in marine applications
B	A DC power connector rated for currents between 30 and 50 amperes
C	A special connector for microwave interfacing
D	A family of multiple circuit connectors suitable for audio and control signals

24. - G7A08

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

Select	Answer
A	All of these choices are correct
B	High frequency operation allows the use of smaller components
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	An analog mixer
B	An array of operational amplifiers used for tri-state arithmetic operations
C	A clocked array of circuits that passes data in steps along the array
D	A digital mixer

26. - G7C10

How is Digital Signal Processor filtering accomplished?

Select	Answer
A	By using direct signal phasing
B	By converting the signal from analog to digital and using digital processing
C	By converting the signal from digital to analog and taking the difference of mixing products
D	By differential spurious phasing

27. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency transformation
B	Frequency conversion
C	Frequency modulation
D	Frequency convolution

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	Multiplier
C	Reactance modulator
D	Mixer

29. - G8C03

What part of a data packet contains the routing and handling information?

Select	Answer
A	Header
B	Preamble
C	Directory
D	Footer

30. - G9A11

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

Select	Answer
A	2:1
B	0:0
C	1:1
D	50:50

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

32. - G9C20

What is meant by the terms dBi and dBd when referring to antenna gain?

Select	Answer
A	dBi refers to an isotropic antenna, dBd refers to a dipole antenna
B	dBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna
C	dBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna
D	dBi refers to an isometric antenna, dBd refers to a discone antenna

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They present low impedance on all design frequencies
B	They must be fed with open wire line
C	They have poor harmonic rejection
D	They must be used with an antenna tuner

34. - G0A11

What precaution should you take if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Locate the antenna close to your operating position to minimize feed line radiation
C	Make sure the antenna is properly shielded
D	Make sure that MPE limits are not exceeded in occupied areas

35. - G0B05

Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?

Select	Answer
A	All of these choices are correct
B	Current flowing from one or more of the voltage-carrying wires to the neutral wire
C	Current flowing from one or more of the voltage-carrying wires directly to ground
D	Overvoltage on the voltage-carrying wires