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	12 meters
B	160 meters
C	20 meters
D	30 meters

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. - G1C01

What is the maximum transmitting power an amateur station may use on 10.140 MHz?

Select	Answer
A	1500 watts PEP output
B	200 watts PEP output
C	2000 watts PEP output
D	1000 watts PEP output

4. - G1D01

Who may receive credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
B	Anyone who held an FCC issued amateur radio license that has been expired for not less than 5 years and not more than 15 years
C	Any person who can demonstrate that they once held an FCC issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
D	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC

5. - G1E09

What language must be used when identifying your station if you are using a language other than English in making a contact using phone emission?

Select	Answer
A	English only
B	Any language recognized by the United Nations
C	The language being used for the contact
D	English, Spanish, French, or German

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Frequency modulation
B	Double sideband
C	Single sideband
D	Phase modulation

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	Change to a different frequency
D	Acknowledge the station in distress and determine what assistance may be needed

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Matching the speed of the transmitting station
B	Sending without error
C	Matching your transmit frequency to the frequency of a received signal
D	Operating split to avoid interference on frequency

9. - G2D08

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

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

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Skywarn
B	RTTY
C	Winlink
D	ARES

11. - G3A13

What does the A-index indicate?

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

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

Select	Answer
A	Select a frequency just below the critical frequency
B	Select a frequency just above the critical frequency
C	Select a frequency just above the LUF
D	Select a frequency just below the MUF

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 sunspot maximum
D	The communication is during a sudden ionospheric disturbance

14. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To balance the transmitter audio frequency response
C	To reduce distortion due to excessive drive
D	To reduce harmonic radiation

15. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Complex waveforms can be measured
B	Input impedance is much lower
C	Complex impedances can be easily measured
D	An oscilloscope uses less power

16. - G4C07

What is one good way to avoid unwanted effects of stray RF energy in an amateur station?

Select	Answer
A	Install an RF filter in series with the ground wire
B	Use a ground loop for best conductivity
C	Connect all equipment grounds together
D	Install a few ferrite beads on the ground wire where it connects to your station

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

Select	Answer
A	It increases peak power
B	It increases average power
C	It reduces intermodulation distortion
D	It reduces harmonic distortion

18. - G4E06

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

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

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Farad
B	Siemens
C	Ampere
D	Ohm

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	10.9 percent
B	25.9 percent
C	20.5 percent
D	12.2 percent

21. - G5C04

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

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

22. - G6A05

What is the approximate junction threshold voltage of a conventional silicon diode?

Select	Answer
A	0.3 volts
B	0.1 volt
C	1.0 volts
D	0.7 volts

23. - G6B12

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

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

24. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	270 degrees
B	90 degrees
C	180 degrees
D	360 degrees

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The time delay of the lag circuit
B	The number of stages in the divider
C	The number of stages in the counter
D	The inductance and capacitance in the tank circuit

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	IF amplifier
B	Balanced modulator
C	Discriminator
D	Detector

27. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	Antenna inductance or capacitance
B	Transmit audio or microphone gain
C	Attenuator level
D	The RF clipping level

28. - G8B08

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

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

29. - G8C02

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

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

30. - G9A01

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

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

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter Radials
B	Lower ground reflection losses
C	Lower radiation resistance
D	Lower feed point impedance

32. - G9C06

What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?

Select	Answer
A	The reflector element must be approximately 5 percent longer than the driven element
B	There must be an open circuit in the driven element at the point opposite the feed point
C	The driven element must be fed with a balun transformer
D	The reflector element must be approximately 5 percent shorter than the driven element

33. - G9D05

What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

Select	Answer
A	It allows quick selection of vertical or horizontal polarization
B	It narrows the main lobe in azimuth
C	It narrows the main lobe in elevation
D	It allows simultaneous vertical and horizontal polarization

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	Its duty cycle
B	Its frequency
C	All of these choices are correct
D	Its power density

35. - G0B07

Which of these choices should be observed when climbing a tower using a safety belt or harness?

Select	Answer
A	Never lean back and rely on the belt alone to support your weight
B	All of these choices are correct
C	Confirm that the belt is rated for the weight of the climber and that it is within its allowable service life
D	Ensure that all heavy tools are securely fastened to the belt D-ring