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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	3900 kHz
B	3750 kHz
C	1875 kHz
D	4005 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	During a declared communications emergency
B	To control a space station
C	Only when the information is of a routine, personal nature
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	56 kilobaud
B	1200 baud
C	19.6 kilobaud
D	300 baud

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	Extra, General and Technician
B	General only
C	Technician only
D	General and Technician

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Any country which is not a member of the International Amateur Radio Union (IARU)
B	Every foreign country, unless there is a third party agreement in effect with that country
C	Countries in ITU Region 2
D	Countries in ITU Region 1

6. - G2A07

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

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

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When they declare a temporary state of communication emergency
B	When they seize your equipment for use in disaster communications
C	Only when all amateur stations are instructed to stop transmitting
D	When the President's War Emergency Powers have been invoked

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	I am troubled by static
B	Stop sending
C	Send more slowly
D	Zero beat my signal

9. - G2D07

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	If you are using other than a dipole antenna, you must keep a record of the gain of your antenna
B	You must keep a record of the date, time, frequency, power level and stations worked
C	You must keep a record of all third party traffic
D	You must keep a record of the manufacturer of your equipment and the antenna used

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.150 - 14.225 MHz
B	14.070 - 14.100 MHz
C	14.275 - 14.350 MHz
D	14.000 - 14.050 MHz

11. - G3A09

What effect does a high sunspot number have on radio communications?

Select	Answer
A	High-frequency radio signals become weak and distorted
B	Frequencies above 300 MHz become usable for long-distance communication
C	Microwave communications become unstable
D	Long-distance communication in the upper HF and lower VHF range is enhanced

12. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	Path distance and location
B	Solar radiation and ionospheric disturbances
C	Time of day and season
D	All of these choices are correct

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

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	Improper action of ALC distorts the signal and can cause spurious emissions
B	When using digital modes, too much ALC activity can cause the transmitter to overheat
C	ALC will invert the modulation of the AFSK mode
D	All of these choices are correct

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. - G4C01

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

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

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 to 14.350 MHz
B	14.3455 to 14.3485 MHz
C	14.344 to 14.347 MHz
D	14.347 to 14.647 MHz

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket's wiring may be inadequate for the current drawn by the transceiver
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	The socket is not wired with an RF-shielded power cable

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Admittance
B	Reluctance
C	Reactance
D	Conductance

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.414
C	1.00
D	2.00

21. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	Additional resistance must be added in series with the primary to prevent overload
B	The secondary voltage becomes 4 times the primary voltage
C	Additional resistance must be added in parallel with the secondary to prevent overload
D	The transformer no longer functions as it is a unidirectional device

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	Large values of inductance may be obtained
D	Most of the magnetic field is contained in the core

23. - G6B14

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

Select	Answer
A	RCA Phono
B	PL-259
C	BNC
D	Type N

24. - G7A07

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

Select	Answer
A	A sine wave at half the frequency of the AC input
B	A series of DC pulses at twice 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. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Add the RF input power to the DC output power
B	Multiply the RF input power by the reciprocal of the RF output power
C	Divide the RF output power by the DC input power
D	Divide the DC input power by the DC output power

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	RF amplifier
B	Filter
C	IF amplifier
D	Carrier oscillator

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By using a transceiver's computer data interface protocol to change frequencies
C	By changing an oscillator's frequency directly with a digital control signal
D	By keying an FM transmitter with a sub-audible tone

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	Mixer
B	Reactance modulator
C	Pre-emphasis network
D	Multiplier

29. - G8C02

How many data bits are sent in a single PSK31 character?

Select	Answer
A	8
B	The number varies
C	5
D	7

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	1:5
B	5:1
C	50:1
D	2:1

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	As high as possible above the ground
B	Parallel to the antenna element
C	At the center of the antenna
D	On the surface of the Earth or buried a few inches below the ground

32. - G9C08

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

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

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. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Post a warning sign that is clearly visible to the neighbor
B	Take precautions to ensure that the antenna cannot be pointed in their direction
C	Use an antenna with a higher front-to-back ratio
D	Change to a non-polarized antenna with higher gain

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	RF exposure limits of the human body
B	Acceptable bandwidth limits
C	Acceptable modulation limits
D	Electrical safety inside the ham shack