US Amateur Radio - General (Element 3, 2015-2019) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2015-2019) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G1A09

Which of the following frequencies is within the General Class portion of the 15-meter band?

Select	Answer
A	24900 kHz
B	21300 kHz
C	14250 kHz
D	18155 kHz

2. - G1B02

With which of the following conditions must beacon stations comply?

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

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	19.6 kilobaud
C	300 baud
D	56 kilobaud

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. - 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. - 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 and the carrier are transmitted; the other sideband is suppressed
D	Only one sideband is transmitted; the other sideband and carrier are suppressed

7. - G2B10

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

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

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	BK
B	KN
C	SK
D	AR

9. - G2D08

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

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

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	Transmit a connect message on the station's published frequency
C	Respond when the station broadcasts its SSID
D	Send QRL in Morse code

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

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

Select	Answer
A	They are bent back to the Earth
B	They are amplified by interaction with the ionosphere
C	They pass through the ionosphere
D	They are bent and trapped in the ionosphere to circle the Earth

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

14. - G4A09

Why is a time delay sometimes included in a transmitter keying circuit?

Select	Answer
A	To allow time for a warning signal to be sent to other stations
B	To allow the transmitter power regulators to charge properly
C	To prevent stations from interfering with one another
D	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed

15. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	RF interference
B	Radio wave propagation
C	Standing wave ratio
D	Antenna front-to-back ratio

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

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 14.647 MHz
B	14.3455 to 14.3485 MHz
C	14.344 to 14.347 MHz
D	14.347 to 14.350 MHz

18. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.02 VDC
B	0.2 VDC
C	1.38 VDC
D	0.5 VDC

19. - G5A01

What is impedance?

Select	Answer
A	The electric charge stored by a capacitor
B	The opposition to the flow of current in an AC circuit
C	The inverse of resistance
D	The force of repulsion between two similar electric fields

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 11 watts
C	Approximately 11 milliwatts
D	Approximately 61 watts

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To prevent parasitic oscillations due to resistive losses in the primary
B	To accommodate the higher current of the primary
C	To improve the coupling between the primary and secondary
D	To insure that the volume of the primary winding is equal to the volume of the secondary winding

22. - G6A11

Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?

Select	Answer
A	A field effect transistor
B	A varistor
C	A bipolar transistor
D	A tunnel diode

23. - G6B12

Which of the following connectors would be a good choice for a serial data port?

Select	Answer
A	Type N
B	Type SMA
C	PL-259
D	DE-9

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	Half the normal output voltage of the power supply
C	Double the normal peak output voltage of the power supply
D	Equal to the normal peak output voltage of the power supply

25. - G7B03

Which of the following describes the function of a two input AND gate?

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

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Detector
B	Discriminator
C	Balanced modulator
D	IF amplifier

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	Signal distortion caused by insufficient collector current
B	The transmitter's automatic level control (ALC) is properly adjusted
C	Signal distortion caused by excessive drive
D	The transmitter's carrier is properly suppressed

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It requests a change in transmitting protocol
B	It requests the packet be retransmitted
C	It sends the packet back to the transmitting station
D	It terminates the contact

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	50 and 75 ohms
B	500 and 750 ohms
C	80 and 100 ohms
D	25 and 30 ohms

31. - G9B06

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

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

32. - G9C17

Approximately how long is each leg of a symmetrical delta-loop antenna?

Select	Answer
A	2/3 wavelength
B	1/4 wavelength
C	1/2 wavelength
D	1/3 wavelength

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	All of these choices are correct
B	Its impedance is too low for effective matching
C	It has poor directivity
D	It has high losses compared to other types of antennas

34. - G0A04

What does "time averaging" mean in reference to RF radiation exposure?

Select	Answer
A	The average amount of power developed by the transmitter over a specific 24 hour period
B	The total time of the exposure
C	The total RF exposure averaged over a certain time
D	The average time it takes RF radiation to have any long-term effect on the body

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