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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations are allowed to use the band only during emergencies
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only with Special Temporary Authorization from the FCC
B	Only when the information is of a routine, personal nature
C	During a declared communications emergency
D	To control a space station

3. - G1C02

What is the maximum transmitting power an amateur station may use on the 12-meter band?

Select	Answer
A	50 watts PEP output
B	An effective radiated power equivalent to 100 watts from a half-wave dipole
C	1500 watts PEP output
D	200 watts PEP output

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	Only the Technician band segments until your upgrade is posted in the FCC database
B	Only on the Technician band segments until your license arrives in the mail
C	On any General or Technician Class band segment
D	On any General or Technician Class band segment except 30-meters and 60-meters

5. - G1E08

Which of the following is a requirement for a non-licensed person to communicate with a foreign Amateur Radio station from a station with an FCC-granted license at which an FCC licensed control operator is present?

Select	Answer
A	All of these choices are correct
B	The foreign amateur station must be in a country with which the United States has a third party agreement
C	The control operator must have at least a General Class license
D	Information must be exchanged in English

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

Select	Answer
A	Vestigial sideband
B	Upper sideband
C	Lower sideband
D	Double sideband

7. - G2B11

What frequency should be used to send a distress call?

Select	Answer
A	Only frequencies authorized for RACES or ARES stations
B	Only frequencies that are within your operating privileges
C	Whichever frequency has the best chance of communicating the distress message
D	Only frequencies used by police, fire or emergency medical services

8. - G2C06

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

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

9. - G2D11

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

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

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	RTTY
B	Winlink
C	Skywarn
D	ARES

11. - G3A10

What causes HF propagation conditions to vary periodically in a 28 day cycle?

Select	Answer
A	The position of the Moon in its orbit
B	Long term oscillations in the upper atmosphere
C	Cyclic variation in the Earth's radiation belts
D	The Sun's rotation on its axis

12. - G3B08

What does MUF stand for?

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

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Excessive drive power
B	Insufficient drive power
C	Shorting the input signal to ground
D	Low input SWR

15. - G4B02

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

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

16. - G4C13

Which of the following can perform automatic notching of interfering carriers?

Select	Answer
A	Bandpass tuning
B	A noise limiter
C	Balanced mixing
D	A Digital Signal Processor (DSP) filter

17. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.175 to 7.178 MHz
B	7.178 to 7.184 MHz
C	7.1765 to 7.1795 MHz
D	7.178 to 7.181 MHz

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To reduce high voltage discharge from the tip of the antenna
B	To narrow the operating bandwidth of the antenna
C	To increase the "Q" of the antenna
D	To reduce the chance of damage if the antenna should strike an object

19. - G5A04

Which of the following causes opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reluctance
B	Reactance
C	Conductance
D	Admittance

20. - G5B01

What dB change represents a two-times increase or decrease in power?

Select	Answer
A	Approximately 6 dB
B	Approximately 12 dB
C	Approximately 3 dB
D	Approximately 2 dB

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	5.9 ohms
C	0.17 ohms
D	10000 ohms

22. - G6A14

Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?

Select	Answer
A	Tight tolerance
B	High stability
C	Comparatively low cost
D	High capacitance for given volume

23. - G6B16

Which of the following describes a type N connector?

Select	Answer
A	An audio connector used in surround-sound installations
B	A small bayonet connector used for data circuits
C	A threaded connector used for hydraulic systems
D	A moisture-resistant RF connector useful to 10 GHz

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. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	SSB
C	CW
D	All of these choices are correct

26. - G7C06

What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

Select	Answer
A	About the same
B	Substantially higher
C	Twice the transmission line impedance
D	Substantially lower

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 convolution
B	Frequency conversion
C	Frequency transformation
D	Frequency modulation

28. - G8B05

What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

Select	Answer
A	2300 Hz
B	500 Hz
C	31.5 Hz
D	1800 Hz

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	FSK441 and Hellschreiber
B	RTTY
C	Clover
D	JT9 and JT65

30. - G9A05

How does the attenuation of coaxial cable change as the frequency of the signal it is carrying increases?

Select	Answer
A	Attenuation increases
B	Attenuation decreases
C	Attenuation is independent of frequency
D	Attenuation reaches a maximum at approximately 18 MHz

31. - G9B06

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

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

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 6 dB higher
C	Approximately 1.5 dB higher
D	Approximately 3 dB higher

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Impedance varies periodically as a function of frequency
B	SWR varies periodically as a function of boom length
C	Gain varies logarithmically as a function of frequency
D	Length and spacing of the elements increase logarithmically from one end of the boom to the other

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes radiation poisoning
B	It causes the blood count to reach a dangerously low level
C	It heats body tissue
D	It cools body tissue

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	All wires
B	Only the two wires carrying voltage
C	Only the ground wire
D	Only the neutral wire