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. - G1A10

Which of the following frequencies is available to a control operator holding a General Class license?

Select	Answer
A	All of these choices are correct
B	28.020 MHz
C	28.350 MHz
D	28.550 MHz

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 coordinated with the National Beacon Organization
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 posted on the Internet or published in a national periodical

3. - G1C08

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

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

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	21 years
B	There is no age limit
C	18 years
D	12 years

5. - G1E06

Which of the following applies in the event of interference between a coordinated repeater and an uncoordinated repeater?

Select	Answer
A	The licensee of the uncoordinated repeater has primary responsibility to resolve the interference
B	Both repeater licensees share equal responsibility to resolve the interference
C	The frequency coordinator bears primary responsibility to resolve the interference
D	The licensee of the coordinated repeater has primary responsibility to resolve the interference

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It occupies less bandwidth
B	It allows "hands free" operation
C	It provides more power output
D	The received signal is more natural sounding

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	Report the interference to your local Amateur Auxiliary Coordinator
B	Increase power to overcome interference
C	As a common courtesy, move your contact to another frequency
D	Tell the interfering stations to change frequency

8. - G2C01

Which of the following describes full break-in telegraphy (QSK)?

Select	Answer
A	An operator must activate a manual send/receive switch before and after every transmission
B	Transmitting stations can receive between code characters and elements
C	Automatic keyers are used to send Morse code instead of hand keys
D	Breaking stations send the Morse code prosign BK

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 ITU requires a log of all international contacts
C	The ITU requires a log of all international third party traffic
D	The log provides evidence of operation needed to renew a license without retest

10. - G2E03

What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?

Select	Answer
A	Failure to establish a connection between stations
B	Frequent retries or timeouts
C	Long pauses in message transmission
D	All of these choices are correct

11. - G3A10

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

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

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

13. - G3C06

What is a characteristic of HF scatter signals?

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

14. - G4A08

What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum SWR on the antenna
B	Minimum plate current without exceeding maximum allowable grid current
C	Highest plate voltage while minimizing grid current
D	Maximum power output without exceeding maximum allowable plate current

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 field strength meter
B	A wavemeter
C	A sidetone monitor
D	An oscilloscope

16. - G4C07

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

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

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz below the edge of the segment
B	At least 3 kHz above the edge of the segment
C	Your displayed carrier frequency may be set at the edge of the segment
D	At least 1 kHz above the edge of the segment

18. - G4E09

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

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

19. - G5A08

Why is impedance matching important?

Select	Answer
A	To ensure that there is less resistance than reactance in the circuit
B	To ensure that the resistance and reactance in the circuit are equal
C	So the load will draw minimum power from the source
D	So the source can deliver maximum power to the load

20. - G5B01

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

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

21. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A capacitor in series
B	An inductor in series
C	A resistor in series
D	A capacitor in parallel

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	All of these choices are correct
B	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
C	Incorrect polarity can cause the capacitor to short-circuit
D	The capacitor could overheat and explode

23. - G6B15

What is the main reason to use keyed connectors instead of non-keyed types?

Select	Answer
A	Higher current carrying capacity
B	Reduced chance of incorrect mating
C	All of these choices are correct
D	Prevention of use by unauthorized persons

24. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 7
B	Symbol 2
C	Symbol 1
D	Symbol 11

25. - G7B02

Which of the following is an advantage of using the binary system when processing digital signals?

Select	Answer
A	The binary number system is most accurate
B	Binary numbers are more compatible with analog circuitry
C	Binary "ones" and "zeros" are easy to represent by an "on" or "off" state
D	All of these choices are correct

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Mixer
B	Product detector
C	Discriminator
D	Phase inverter

27. - G8A05

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

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

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It minimizes power consumption in the receiver
C	It is required by FCC rules
D	It results in the best signal to noise ratio

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	High and Low
B	Dot and Dash
C	Mark and Space
D	On and Off

30. - G9A11

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

Select	Answer
A	0:0
B	50:50
C	2:1
D	1:1

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It increases
B	It reaches a maximum at an angle of 45 degrees
C	It stays the same
D	It decreases

32. - G9C15

Approximately how long is each side of the reflector element of a quad antenna?

Select	Answer
A	Slightly more than 1/2 wavelength
B	Slightly less than 1/4 wavelength
C	Slightly less than 1/2 wavelength
D	Slightly more than 1/4 wavelength

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They present low impedance on all design frequencies
C	They must be fed with open wire line
D	They must be used with an antenna tuner

34. - G0A09

What type of instrument can be used to accurately measure an RF field?

Select	Answer
A	An SWR meter with a peak-reading function
B	A receiver with an S meter
C	A calibrated field strength meter with a calibrated antenna
D	An oscilloscope with a high-stability crystal marker generator

35. - G0B13

What must you do when powering your house from an emergency generator?

Select	Answer
A	Disconnect the incoming utility power feed
B	All of these choices are correct
C	Insure that the generator is not grounded
D	Insure that all lightning grounds are disconnected

Figure G7-1