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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	4005 kHz
B	3750 kHz
C	1875 kHz
D	3900 kHz

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	They are not permitted
B	Only "10 codes" are permitted
C	Only "Q" signals are permitted
D	They may be used if they do not obscure the meaning of a message

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

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

4. - G1D01

Who may receive credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
B	Any person who can demonstrate that they once held an FCC issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
C	Anyone who held an FCC issued amateur radio license that has been expired for not less than 5 years and not more than 15 years
D	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license

5. - G1E04

Which of the following conditions require a licensed Amateur Radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All of these choices are correct
B	When a station is transmitting spread spectrum emissions
C	When operating within one mile of an FCC Monitoring Station
D	When using a band where the Amateur Service is secondary

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	Upper sideband
C	Double sideband
D	Lower sideband

7. - G2B12

When is an amateur station allowed to use any means at its disposal to assist another station in distress?

Select	Answer
A	At any time during an actual emergency
B	Only when transmitting in RACES
C	At any time when transmitting in an organized net
D	Only on authorized HF frequencies

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	Send slower
B	I acknowledge receipt
C	We have already confirmed by card
D	We have worked before

9. - G2D11

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

Select	Answer
A	An isotropic antenna
B	A quarter-wave vertical antenna
C	A directional 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	DSB
B	LSB
C	CW
D	USB

11. - G3A15

How long does it take charged particles from coronal mass ejections to affect radio propagation on the Earth?

Select	Answer
A	20 to 40 hours
B	28 days
C	14 days
D	4 to 8 minutes

12. - G3B09

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?

Select	Answer
A	180 miles
B	2,500 miles
C	12,000 miles
D	1,200 miles

13. - G3C12

Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?

Select	Answer
A	The E layer
B	The F2 layer
C	The D layer
D	The F1 layer

14. - G4A02

What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

Select	Answer
A	Interference from impulse noise will be eliminated
B	It may be possible to reduce or eliminate interference from other signals
C	More stations can be accommodated within a given signal passband
D	Accidental out of band operation can be prevented

15. - G4B12

What problem can occur when making measurements on an antenna system with an antenna analyzer?

Select	Answer
A	Connecting the analyzer to an antenna can cause it to absorb harmonics
B	Permanent damage to the analyzer may occur if it is operated into a high SWR
C	The analyzer can be damaged if measurements outside the ham bands are attempted
D	Strong signals from nearby transmitters can affect the accuracy of measurements

16. - G4C13

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

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

17. - G4D06

Where is an S meter found?

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

18. - G4E10

What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	The diode greatly increases the efficiency during times of high illumination
B	The diode prevents self-discharge of the battery though the panel during times of low or no illumination
C	The diode serves to regulate the charging voltage to prevent overcharge
D	The diode limits the current flowing from the panel to a safe value

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To reduce power supply ripple
B	To minimize radiation resistance
C	To maximize the transfer of power
D	To minimize transmitter power output

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 61 watts
B	Approximately 61 milliwatts
C	Approximately 11 watts
D	Approximately 11 milliwatts

21. - G5C10

What is the inductance of three 10 millihenry inductors connected in parallel?

Select	Answer
A	3.3 millihenrys
B	0.30 henrys
C	30 millihenrys
D	3.3 henrys

22. - G6A02

What is an advantage of the low internal resistance of nickel-cadmium batteries?

Select	Answer
A	High voltage
B	Rapid recharge
C	High discharge current
D	Long life

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	All of these choices are correct
B	Faster response time
C	Lower power consumption
D	Longer life

24. - G7A11

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

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

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	All of these choices are correct
D	CW

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	Phase inverter
B	Discriminator
C	Mixer
D	Product detector

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

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	BFO
B	Discriminator
C	Mixer
D	VFO

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 7-bit code with start, stop and parity bits
B	A 5-bit code with additional start and stop bits
C	A code using error detection and correction
D	A code using SELCAL and LISTEN

30. - G9A02

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

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

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength above ground
C	It steadily increases
D	It is unaffected by the height above ground

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	All of these choices are correct
B	It is useful for matching multiband antennas
C	It does not require that the elements be insulated from the boom
D	It does not require any inductors or capacitors

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

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

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	Its frequency
B	All of these choices are correct
C	Its power density
D	Its duty cycle

35. - G0B04

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

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

Figure G7-1