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	3900 kHz
B	4005 kHz
C	3750 kHz
D	1875 kHz

2. - G1B07

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

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

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	300 baud
B	19.6 kilobaud
C	56 kilobaud
D	1200 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	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
C	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
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	When a station is transmitting spread spectrum emissions
B	When operating within one mile of an FCC Monitoring Station
C	When using a band where the Amateur Service is secondary
D	All of these choices are correct

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

Select	Answer
A	Vestigial sideband
B	Upper sideband
C	Double sideband
D	Lower sideband

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	Contest operations must always yield to non-contest use of frequencies
B	Nets always have priority
C	Except during FCC declared emergencies, no one has priority access to frequencies
D	QSOs in progress always have priority

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Listening for novice stations
C	Operating full break-in
D	Closing station now

9. - G2D10

What is QRP operation?

Select	Answer
A	Remote piloted model control
B	Transmission using Quick Response Protocol
C	Low power transmit operation
D	Traffic relay procedure net operation

10. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	The mark and space frequencies may be reversed
B	All of these choices are correct
C	You may have selected the wrong baud rate
D	You may be listening on the wrong sideband

11. - G3A13

What does the A-index indicate?

Select	Answer
A	The amount of polarization of the Sun's electric field
B	The long term stability of the Earth's geomagnetic field
C	The solar radio flux at Boulder, Colorado
D	The relative position of sunspots on the surface of the Sun

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are bent back to the Earth
B	They are bent and trapped in the ionosphere to circle the Earth
C	They are completely absorbed by 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 E layer is unstable during daylight hours
B	The D layer absorbs signals at these frequencies during daylight hours
C	The F layer is unstable during daylight hours
D	The F layer absorbs signals at these frequencies during daylight hours

14. - G4A09

Why is a time delay sometimes included in a transmitter keying circuit?

Select	Answer
A	To allow the transmitter power regulators to charge properly
B	To allow time for a warning signal to be sent to other stations
C	To prevent stations from interfering with one another
D	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed

15. - G4B06

What is an advantage of a digital voltmeter as compared to an analog voltmeter?

Select	Answer
A	Faster response
B	Better precision for most uses
C	Better for measuring computer circuits
D	Better for RF measurements

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding series capacitors to the conductors
B	Adding shunt inductors to the conductors
C	Placing a ferrite choke around the cable
D	Adding an additional insulating jacket to the cable

17. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 100 times more powerful
B	It is 10 times less powerful
C	It is 20 times more powerful
D	It is 20 times less powerful

18. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full size antenna?

Select	Answer
A	Harmonic radiation may increase
B	Short antennas are more likely to cause distortion of transmitted signals
C	Operating bandwidth may be very limited
D	Short antennas can only receive circularly polarized signals

19. - G5A04

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

Select	Answer
A	Reluctance
B	Admittance
C	Conductance
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	1.414
D	2.00

21. - G5C17

What is the value in nanofarads (nF) of a 22,000 pF capacitor?

Select	Answer
A	22 nF
B	220 nF
C	0.22 nF
D	2.2 nF

22. - G6A07

What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?

Select	Answer
A	Its saturation and cutoff regions
B	Its enhancement and depletion modes
C	Its peak and valley current points
D	Its active region (between the cutoff and saturation regions)

23. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Programmable Logic
C	MMIC
D	Digital

24. - G7A02

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

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

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

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

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	RF oscillator
B	IF filter
C	Balanced modulator
D	Product detector

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

28. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	5 kHz
B	3 kHz
C	16 kHz
D	8 kHz

29. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Higher power is needed as compared to RTTY for similar error rates
B	Varicode Error Correction is used to ensure accurate message reception
C	Upper case letters make the signal stronger
D	Upper case letters use longer Varicode signals and thus slow down transmission

30. - G9A08

If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1 to 1 and 5 to 1 depending on the characteristic impedance of the line
B	1 to 1
C	5 to 1
D	Between 1 to 1 and 5 to 1 depending on the reflected power at the transmitter

31. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	32 feet
B	24 feet
C	16 feet
D	8 feet

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

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	It has poor directivity
B	All of these choices are correct
C	It has high losses compared to other types of antennas
D	Its impedance is too low for effective matching

34. - G0A07

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

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

35. - G0B06

Why must the metal enclosure of every item of station equipment be grounded?

Select	Answer
A	It ensures that hazardous voltages cannot appear on the chassis
B	It prevents a blown fuse in the event of an internal short circuit
C	It ensures that the neutral wire is grounded
D	It prevents signal overload