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. - G1A05

Which of the following frequencies is in the General Class portion of the 40-meter band?

Select	Answer
A	40.200 MHz
B	7.500 MHz
C	7.250 MHz
D	40.500 MHz

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	To control a space station
D	During a declared communications emergency

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	56 kilobaud
D	300 baud

4. - G1D04

Which of the following is a requirement for administering a Technician Class license examination?

Select	Answer
A	At least three General Class or higher VEs must observe the examination
B	At least three VEs of Technician Class or higher must observe the examination
C	At least two General Class or higher VEs must be present, but only one need be Extra Class
D	At least two General Class or higher VEs must be present

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Any messages, as long as the text of the message is recorded in the station log
B	Any message, as long as the amateur operator is not paid
C	Only messages for other licensed amateurs
D	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All of these choices are correct
B	Check to see if the channel is assigned to another station
C	Follow the voluntary band plan for the operating mode you intend to use
D	Identify your station by transmitting your call sign at least 3 times

8. - G2C07

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

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

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	Band and/or frequency of the contact
B	All of these choices are correct
C	Call sign of station contacted and the signal report given
D	Date and time of contact

10. - G2E07

What segment of the 80-meter band is most commonly used for digital transmissions?

Select	Answer
A	3570 - 3600 kHz
B	3500 - 3525 kHz
C	3775 - 3825 kHz
D	3700 - 3750 kHz

11. - G3A09

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

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

12. - G3B01

How might a sky-wave signal sound if it arrives at your receiver by both short path and long path propagation?

Select	Answer
A	Signal strength increased by 3 dB
B	A well-defined echo might be heard
C	Periodic fading approximately every 10 seconds
D	The signal might be cancelled causing severe attenuation

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	All of these choices are correct
B	They have a wavering sound
C	They have high intelligibility
D	They have very large swings in signal strength

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A slow, rhythmic oscillation
B	No change will be observed
C	A pronounced dip
D	A pronounced peak

15. - G4B13

What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Select	Answer
A	Measuring the front to back ratio of an antenna
B	Determining the gain of a directional antenna
C	Measuring the turns ratio of a power transformer
D	Determining the impedance of an unknown or unmarked coaxial cable

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	7.178 to 7.181 MHz
D	7.1765 to 7.1795 MHz

18. - G4E09

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

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

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the amplitude of the applied AC increases, the reactance increases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance decreases

20. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak-to-peak value
B	The reciprocal of the RMS value
C	The RMS value
D	The peak value

21. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Capacitive coupling
B	Mutual inductance
C	Mutual capacitance
D	Displacement current coupling

22. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?

Select	Answer
A	10.5 volts
B	12 volts
C	8.5 volts
D	6 volts

23. - G6B11

What is a microprocessor?

Select	Answer
A	A microwave detector, amplifier, and local oscillator on a single integrated circuit
B	A computer on a single integrated circuit
C	A low voltage amplifier used in a microwave transmitter modulator stage
D	A low power analog signal processor used as a microwave detector

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	Half the normal output voltage of the power supply
B	Double the normal peak output voltage of the power supply
C	Equal to the normal peak output voltage of the power supply
D	One-quarter the normal 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 low only when both inputs are high
B	Output is high only when both inputs are high
C	Output is high when either or both inputs are low
D	Output is low when either or both inputs are high

26. - G7C09

Which of the following is needed for a Digital Signal Processor IF filter?

Select	Answer
A	An analog to digital converter
B	A digital to analog converter
C	A digital processor chip
D	All of the these choices are correct

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Frequency modulation
B	Amplitude modulation
C	Frequency shift keying
D	Phase modulation

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	Multiplier
C	Reactance modulator
D	Pre-emphasis network

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The number of characters that can be represented by PSK31
B	The version of the PSK protocol
C	The approximate transmitted symbol rate
D	The year in which PSK31 was invented

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	75 ohms
B	50 ohms
C	300 ohms
D	100 ohms

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	84 feet
C	42 feet
D	131 feet

32. - G9C16

How does the gain of a two-element delta-loop beam compare to the gain of a two-element quad antenna?

Select	Answer
A	3 dB lower
B	3 dB higher
C	2.54 dB higher
D	About the same

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 high losses compared to other types of antennas
D	It has poor directivity

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should limited to 10 feet in height
B	It should not be installed in a wet area
C	It should be installed such that it is protected against unauthorized access
D	It should not be installed higher than you can reach

35. - G0B04

Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

Select	Answer
A	Lack of oxygen for adequate combustion
B	Danger of engine over torque
C	Danger of carbon monoxide poisoning
D	Lack of nitrogen for adequate combustion