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. - G1A14

In what ITU region is operation in the 7.175 to 7.300 MHz band permitted for a control operator holding an FCC issued General Class license?

Select	Answer
A	All three regions
B	Region 2
C	Region 1
D	Region 3

2. - G1B06

When is an amateur station permitted to transmit secret codes?

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

3. - G1C09

What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

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

4. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?

Select	Answer
A	Whenever you operate on any amateur frequency
B	Whenever you operate using Technician frequency privileges
C	Whenever you operate using General Class frequency privileges
D	A special identifier is not required as long as your General Class license application has been filed with the FCC

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
B	Only during an FCC declared general state of communications emergency
C	Only if the 10-meter repeater control operator holds at least a General Class license
D	Under no circumstances

6. - G2A05

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

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

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	As a common courtesy, move your contact to another frequency
C	Tell the interfering stations to change frequency
D	Increase power to overcome interference

8. - G2C01

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

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

9. - G2D07

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third party traffic
B	You must keep a record of the manufacturer of your equipment and the antenna used
C	If you are using other than a dipole antenna, you must keep a record of the gain of your antenna
D	You must keep a record of the date, time, frequency, power level and stations worked

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Long Path propagation
B	Overmodulation
C	Backscatter propagation
D	Insufficient modulation

11. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At any point in the solar cycle
B	At the summer solstice
C	Only at the minimum point of the solar cycle
D	Only at the maximum point of the solar cycle

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

Select	Answer
A	They are bent and trapped in the ionosphere to circle the Earth
B	They are bent back to the Earth
C	They are amplified by interaction with the ionosphere
D	They pass through the ionosphere

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

Select	Answer
A	The F layer absorbs signals at these frequencies during daylight hours
B	The E layer is unstable during daylight hours
C	The D layer absorbs signals at these frequencies during daylight hours
D	The F layer is unstable during daylight hours

14. - G4A10

What is the purpose of an electronic keyer?

Select	Answer
A	Automatic transmit/receive switching
B	Computer interface for PSK and RTTY operation
C	Automatic generation of strings of dots and dashes for CW operation
D	VOX operation

15. - G4B15

What type of transmitter performance does a two-tone test analyze?

Select	Answer
A	Percentage of frequency modulation
B	Percentage of suppression of carrier and undesired sideband for SSB
C	Linearity
D	Percentage of carrier phase shift

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	The ground rod is resonant
C	Insulated wire has been used for the ground wire
D	Flat braid rather than round wire has been used for the ground wire

17. - G4D06

Where is an S meter found?

Select	Answer
A	In a conductance bridge
B	In an SWR bridge
C	In a receiver
D	In a transmitter

18. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To allow automatic band changing
B	To electrically lengthen a physically short antenna
C	To increase the power handling capacity of a whip antenna
D	To allow remote tuning

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Ohm
C	Farad
D	Siemens

20. - G5B12

What would be the RMS voltage across a 50 ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	245 volts
C	692 volts
D	346 volts

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To improve the coupling between the primary and secondary
B	To accommodate the higher current of the primary
C	To insure that the volume of the primary winding is equal to the volume of the secondary winding
D	To prevent parasitic oscillations due to resistive losses in the primary

22. - G6A15

Which of the following is an advantage of an electrolytic capacitor?

Select	Answer
A	Tight tolerance
B	Inexpensive RF capacitor
C	Much less leakage than any other type
D	High capacitance for a given volume

23. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

Select	Answer
A	RJ-11
B	PL-259
C	Octal
D	DB-25

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	All of these choices are correct
B	High frequency operation allows the use of smaller components
C	Fewer circuit components are required
D	Faster switching time makes higher output voltage possible

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class A
B	Class AB
C	Class C
D	Class B

26. - G7C11

What is meant by the term "software defined radio" (SDR)?

Select	Answer
A	A radio in which most major signal processing functions are performed by software
B	A radio that uses crystal filters designed using software
C	A radio that provides computer interface for automatic logging of band and frequency
D	A computer model that can simulate performance of a radio to aid in the design process

27. - G8A06

What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?

Select	Answer
A	Simpler receiving equipment can be used
B	Audio fidelity is improved
C	Available transmitter power can be used more effectively
D	Greater modulation percentage is obtainable with lower distortion

28. - G8B01

What receiver stage combines a 14.250 MHz input signal with a 13.795 MHz oscillator signal to produce a 455 kHz intermediate frequency (IF) signal?

Select	Answer
A	Mixer
B	BFO
C	VFO
D	Discriminator

29. - G8C01

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

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

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	50 and 75 ohms
B	500 and 750 ohms
C	80 and 100 ohms
D	25 and 30 ohms

31. - G9B12

What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?

Select	Answer
A	16 feet
B	8 feet
C	21 feet
D	11 feet

32. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Loading coils in series with the element
B	Larger diameter elements
C	Tapered-diameter elements
D	Closer element spacing

33. - G9D07

Which of the following describes a log periodic antenna?

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

34. - G0A09

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

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

35. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To shut off the power supply if too much voltage is produced
C	To prevent unauthorized changes to the circuit that would void the manufacturer's warranty
D	To shut down the unit if it becomes too hot