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

2. - G1B12

Who or what determines "good engineering and good amateur practice" as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The IEEE
B	The Control Operator
C	The FCC
D	The ITU

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Only the minimum power necessary to carry out the desired communications should be used
B	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
C	Power should be limited as necessary to avoid interference to another radio service on the frequency
D	Effective radiated power cannot exceed 1500 watts

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	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
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	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

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Only messages for other licensed amateurs
B	Any messages, as long as the text of the message is recorded in the station log
C	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
D	Any message, as long as the amateur operator is not paid

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	Double sideband
B	Vestigial sideband
C	Lower sideband
D	Upper sideband

7. - G2B04

When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 to 500 Hz
B	3 to 6 kHz
C	1 to 3 kHz
D	5 to 50 Hz

8. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The speed at which the CQ was sent
B	At the standard calling speed of 5 wpm
C	A slow speed until contact is established
D	The fastest speed at which you are comfortable copying

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
B	A map that shows accurate land masses
C	A map that shows true bearings and distances from a particular location
D	A map that shows the angle at which an amateur satellite crosses the equator

10. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Joining an existing contact is not possible, PACTOR connections are limited to two stations
C	Send a NAK response continuously so that the sending station has to pause
D	Transmit a steady carrier until the PACTOR protocol times out and disconnects

11. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	A thunderstorm which affects radio propagation
C	Ripples in the ionosphere
D	A temporary disturbance in the Earth's magnetosphere

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	No HF radio frequency will support ordinary sky-wave communications over the path
B	Propagation over the path on all HF frequencies is enhanced
C	HF communications over the path are enhanced
D	Double hop propagation along the path is more common

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 F1 layer
B	The E layer
C	The D layer
D	The F2 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	Accidental out of band operation can be prevented
B	Interference from impulse noise will be eliminated
C	More stations can be accommodated within a given signal passband
D	It may be possible to reduce or eliminate interference from other signals

15. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The local oscillator of the transmitter
B	An external RF oscillator
C	The attenuated RF output of the transmitter
D	The transmitter balanced mixer output

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	On-and-off humming or clicking
B	A steady hum whenever the transmitter is on the air
C	Clearly audible speech
D	Distorted speech

17. - G4D04

What does an S meter measure?

Select	Answer
A	Conductance
B	Impedance
C	Received signal strength
D	Transmitter power output

18. - G4E01

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

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

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Reactance
B	Admittance
C	Reluctance
D	Conductance

20. - G5B09

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

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

21. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A resistor in series
B	A capacitor in series
C	An inductor in series
D	A capacitor in parallel

22. - G6A05

What is the approximate junction threshold voltage of a conventional silicon diode?

Select	Answer
A	1.0 volts
B	0.3 volts
C	0.7 volts
D	0.1 volt

23. - G6B05

What is meant when memory is characterized as non-volatile?

Select	Answer
A	The stored information is maintained even if power is removed
B	It is resistant to high temperatures
C	The stored information cannot be changed once written
D	It is resistant to radiation damage

24. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A series of DC pulses at twice the frequency of the AC input
C	A sine wave at half the frequency of the AC input
D	A steady DC voltage

25. - G7B06

What is a shift register?

Select	Answer
A	A digital mixer
B	An array of operational amplifiers used for tri-state arithmetic operations
C	An analog mixer
D	A clocked array of circuits that passes data in steps along the array

26. - G7C07

What is the simplest combination of stages that implement a superheterodyne receiver?

Select	Answer
A	HF oscillator, mixer, detector
B	RF amplifier, detector, audio amplifier
C	RF amplifier, mixer, IF discriminator
D	HF oscillator, prescaler, audio amplifier

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Phase modulation
C	Frequency shift keying
D	Frequency modulation

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	Discriminator
B	BFO
C	Mixer
D	VFO

29. - G8C08

Which of the following statements is true about PSK31?

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

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

31. - G9B12

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

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

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The number of directors versus the number of reflectors
B	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
C	The relative position of the driven element with respect to the reflectors and directors
D	The ratio of forward gain to dipole gain

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

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

34. - G0A05

What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?

Select	Answer
A	File an Environmental Impact Statement (EIS-97) with the FCC
B	Secure written permission from your neighbors to operate above the controlled MPE limits
C	Take action to prevent human exposure to the excessive RF fields
D	All of these choices are correct

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable bandwidth limits
B	Electrical safety inside the ham shack
C	RF exposure limits of the human body
D	Acceptable modulation limits