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

2. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	200 watts PEP output
B	100 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

4. - G1D05

Which of the following must a person have before they can be an administering VE for a Technician Class license examination?

Select	Answer
A	An FCC General Class or higher license and VEC accreditation
B	Possession of a properly obtained telegraphy license
C	Notification to the FCC that you want to give an examination
D	Receipt of a CSCE for General Class

5. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	The station initiating the contact must be under local or remote control
C	No third party traffic maybe be transmitted
D	The control operator of the interrogating station must hold an Extra Class license

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Lower sideband is more efficient than upper sideband at these frequencies
C	Because it is fully compatible with an AM detector
D	Current amateur practice is to use lower sideband on these frequency bands

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Approximately 3 kHz
B	Approximately 6 kHz
C	Approximately 10 kHz
D	Between 150 and 500 Hz

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	Key clicks
C	Chirpy or unstable signal
D	100 percent copy

9. - G2D11

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

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

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	USB
B	DSB
C	LSB
D	CW

11. - G3A08

Which of the following effects can a geomagnetic storm have on radio propagation?

Select	Answer
A	Improved chances of UHF ducting
B	Improved ground-wave propagation
C	Degraded high-latitude HF propagation
D	Improved high-latitude HF propagation

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 Maximum Usable Frequency for communications between two points
D	The Minimum Usable Frequency during a 24 hour period

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	They have high intelligibility
D	All of these choices are correct

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Q Multiplier
B	SWR Bridge
C	Balanced modulator
D	Antenna coupler or antenna tuner

15. - G4B14

What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

Select	Answer
A	When adjusting tuned circuits
B	When measuring the frequency of an oscillator
C	When testing logic circuits
D	When high precision is desired

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	The ground wire has high impedance on that frequency
B	Insulated wire has been used for the ground wire
C	The ground rod is resonant
D	Flat braid rather than round wire has been used for the ground wire

17. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 4 times
B	Approximately 8 times
C	Approximately 1.5 times
D	Approximately 2 times

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The antenna system
B	FCC rules limiting mobile output power on the 75-meter band
C	The wire gauge of the DC power line to the transceiver
D	"Picket Fencing" signal variation

19. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of direct current caused by resistance
B	A large spark produced at switch contacts when an inductor is de-energized
C	A property of ideal resistors in AC circuits
D	Opposition to the flow of alternating current caused by capacitance or inductance

20. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	12 volts
B	34 volts
C	24 volts
D	8.5 volts

21. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	The secondary voltage becomes 4 times the primary voltage
B	Additional resistance must be added in series with the primary to prevent overload
C	Additional resistance must be added in parallel with the secondary to prevent overload
D	The transformer no longer functions as it is a unidirectional device

22. - G6A11

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

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

23. - G6B11

What is a microprocessor?

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

24. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 1
B	Symbol 4
C	Symbol 11
D	Symbol 5

25. - G7B07

What are the basic components of virtually all sine wave oscillators?

Select	Answer
A	A frequency multiplier and a mixer
B	A filter and an amplifier operating in a feedback loop
C	An amplifier and a divider
D	A circulator and a filter operating in a feed-forward loop

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

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. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Mixer interference
B	Intermediate interference
C	Quadrature noise
D	Image response

29. - G8C09

What does the number 31 represent in "PSK31"?

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

30. - G9A13

What standing wave ratio will result when connecting a 50 ohm feed line to an antenna that has a purely resistive 300 ohm feed point impedance?

Select	Answer
A	3:1
B	1.5:1
C	You cannot determine SWR from impedance values
D	6:1

31. - G9B01

What is one disadvantage of a directly fed random-wire HF antenna?

Select	Answer
A	It produces only vertically polarized radiation
B	You may experience RF burns when touching metal objects in your station
C	It is more effective on the lower HF bands than on the higher bands
D	It must be longer than 1 wavelength

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	2.54 dB higher
C	About the same
D	3 dB higher

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Non-Varying Indicated SWR
B	Near Vertical Incidence sky-wave
C	Nearly Vertical Inductance System
D	Non-Varying Impedance Smoothing

34. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on computer modeling
B	By measurement of field strength using calibrated equipment
C	All of these choices are correct
D	By calculation based on FCC OET Bulletin 65

35. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	All of these choices are correct
B	Make sure all circuits that supply power to the tower are locked out and tagged
C	Notify the electric company that a person will be working on the tower
D	Unground the base of the tower

Figure G7-1