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. - G1A04

Which of the following amateur bands is restricted to communication on only specific channels, rather than frequency ranges?

Select	Answer
A	60 meters
B	11 meters
C	30 meters
D	12 meters

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	At any time, as long as it produces no spurious emissions
B	When it is an incidental part of a manned space craft retransmission
C	When it is transmitted on frequencies above 1215 MHz
D	When it is unintentionally transmitted from the background at the transmitter

3. - G1C06

Which of the following is a limitation on transmitter power on the 1.8 MHz band?

Select	Answer
A	200 watts PEP output
B	1000 watts PEP output
C	1500 watts PEP output
D	1200 watts PEP output

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	365 days
C	30 days
D	180 days

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Fail-safe digital station
B	Robotically controlled station
C	Automatically controlled digital station
D	Locally controlled station

6. - G2A07

Which of the following statements is true of the single sideband voice mode?

Select	Answer
A	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
B	Only one sideband is transmitted; the other sideband and carrier are suppressed
C	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands
D	Only one sideband and the carrier are transmitted; the other sideband is suppressed

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
B	Listen for 2 minutes before calling CQ
C	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
D	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response

8. - G2C11

What does the Q signal "QRV" mean?

Select	Answer
A	I am ready to receive messages
B	I am quitting for the day
C	You are sending too fast
D	There is interference on the frequency

9. - G2D05

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country is a member of the International Amateur Radio Union
B	When the contact is with amateurs in any country as long as the communication is conducted in English
C	Only when the foreign country has a formal third party agreement filed with the FCC
D	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Winlink
B	ARES
C	Skywarn
D	RTTY

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
B	All of these choices are correct.
C	A zero sunspot number indicate radio propagation is not possible on any band
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

12. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	Path distance and location
B	Solar radiation and ionospheric disturbances
C	All of these choices are correct
D	Time of day and season

13. - G3C02

Where on the Earth do ionospheric layers reach their maximum height?

Select	Answer
A	Where the Sun has just set
B	Where the Sun is rising
C	Where the Sun is overhead
D	Where the Sun is on the opposite side of the Earth

14. - G4A15

Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?

Select	Answer
A	The transmitter signal is distorted
B	All of these choices are correct
C	The VOX circuit does not un-key the transmitter
D	Frequent connection timeouts

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

16. - G4C09

How can a ground loop be avoided?

Select	Answer
A	Connect all ground conductors in series
B	Connect the AC neutral conductor to the ground wire
C	Avoid using lock washers and star washers when making ground connections
D	Connect all ground conductors to a single point

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 2 times
C	Approximately 8 times
D	Approximately 1.5 times

18. - G4E09

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

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

19. - G5A04

Which of the following causes opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Conductance
B	Admittance
C	Reluctance
D	Reactance

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	1.00
B	0.707
C	2.00
D	1.414

21. - G5C06

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

Select	Answer
A	2370 volts
B	26.7 volts
C	5.9 volts
D	540 volts

22. - G6A13

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

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

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Microphone and transceiver
B	Amplifier and antenna
C	Power supply and amplifier
D	Computer and transceiver

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Quartz crystals
B	Diodes
C	Capacitors and inductors
D	Transformers and transducers

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	No need for bias
B	Low standby power
C	Low distortion
D	High Efficiency

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	Substantially lower
B	Twice the transmission line impedance
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 modulation
B	Amplitude modulation
C	Frequency shift keying
D	Phase modulation

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	60 kHz
B	416.7 Hz
C	5 kHz
D	101.75 Hz

29. - G8C04

Which of the following describes Baudot code?

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

30. - G9A05

How does the attenuation of coaxial cable change as the frequency of the signal it is carrying increases?

Select	Answer
A	Attenuation decreases
B	Attenuation is independent of frequency
C	Attenuation reaches a maximum at approximately 18 MHz
D	Attenuation increases

31. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It peaks at about 1/8 wavelength from the end
B	It steadily decreases
C	It steadily increases
D	It is unaffected by the location of the feed point

32. - G9C04

Which statement about a three-element, single-band Yagi antenna is true?

Select	Answer
A	The reflector is normally the longest element
B	All of the elements must be the same length
C	The director is normally the longest element
D	The reflector is normally the shortest element

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

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

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	High duty cycle transmitters are exempt from RF exposure requirements
B	A higher transmitter duty cycle permits greater short-term exposure levels
C	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
D	A lower transmitter duty cycle permits greater short-term exposure levels

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	Solder has too high a dielectric constant to provide adequate lightning protection
B	A soldered joint will likely be destroyed by the heat of a lightning strike
C	Solder flux will prevent a low conductivity connection
D	The resistance of solder is too high