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	30 meters
B	60 meters
C	11 meters
D	12 meters

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
B	All of these choices are correct
C	The FCC must have declared a state of emergency
D	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event

3. - G1C05

Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	100 watts PEP output
D	2000 watts PEP output

4. - G1D11

If a person has an expired FCC issued amateur radio license of General Class or higher, what is required before they can receive a new license?

Select	Answer
A	There are no requirements other than being able to show a copy of the expired license
B	They must have a letter from the FCC showing they once held an amateur or commercial license
C	The applicant must pass the current element 2 exam
D	The applicant must be able to produce a copy of a page from a call book published in the USA showing his or her name and address

5. - G1E01

Which of the following would disqualify a third party from participating in stating a message over an amateur station?

Select	Answer
A	The third party is speaking in a language other than English
B	The third party is not a U.S. citizen
C	The third party's amateur license has been revoked and not reinstated
D	The third party is a licensed amateur

6. - G2A05

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

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

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

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Stop sending
B	I am troubled by static
C	Send more slowly
D	Zero beat my signal

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To encourage self-regulation and compliance with the rules by radio amateur operators
B	To coordinate repeaters for efficient and orderly spectrum usage
C	To provide emergency and public safety communications
D	To conduct efficient and orderly amateur licensing examinations

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.000 - 14.050 MHz
B	14.150 - 14.225 MHz
C	14.070 - 14.100 MHz
D	14.275 - 14.350 MHz

11. - G3A10

What causes HF propagation conditions to vary periodically in a 28 day cycle?

Select	Answer
A	The Sun's rotation on its axis
B	Cyclic variation in the Earth's radiation belts
C	The position of the Moon in its orbit
D	Long term oscillations in the upper atmosphere

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 pass through the ionosphere
C	They are amplified by interaction with the ionosphere
D	They are bent back to the Earth

13. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The ionospheric layer involved is unstable
B	Ground waves are absorbing much of the signal
C	Energy is scattered into the skip zone through several different radio wave paths
D	The E-region is not present

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced dip
C	A pronounced peak
D	No change will be observed

15. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All of these choices are correct
B	Receiver
C	Transmitter
D	Antenna and feed line

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Reverse-biased diode
B	Bypass inductor
C	Bypass capacitor
D	Forward-biased diode

17. - G4D04

What does an S meter measure?

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

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 automatic band changing
C	To increase the power handling capacity of a whip antenna
D	To allow remote tuning

19. - G5A13

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A transformer
B	All of these choices are correct
C	A length of transmission line
D	A Pi-network

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

Select	Answer
A	625 watts
B	5000 watts
C	8.75 watts
D	2500 watts

21. - G5C05

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

Select	Answer
A	150 ohms
B	175 ohms
C	1500 ohms
D	90 ohms

22. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase efficiency
B	To decrease plate resistance
C	To reduce grid-to-plate capacitance
D	To increase the control grid resistance

23. - G6B14

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

Select	Answer
A	Type N
B	RCA Phono
C	PL-259
D	BNC

24. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 5
B	Symbol 1
C	Symbol 2
D	Symbol 4

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Divide the RF output power by the DC input power
C	Add the RF input power to the DC output power
D	Multiply the RF input power by the reciprocal of the RF output power

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	Product detector
B	Discriminator
C	Phase inverter
D	Mixer

27. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency conversion
B	Frequency transformation
C	Frequency convolution
D	Frequency modulation

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It is required by FCC rules
C	It minimizes power consumption in the receiver
D	It results in the best signal to noise ratio

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Varicode
B	Viterbi
C	Binary
D	Volumetric

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

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	84 feet
C	42 feet
D	131 feet

32. - G9C03

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

Select	Answer
A	The director is normally the shortest element
B	The driven element is the longest element
C	Low feed point impedance increases bandwidth
D	The reflector is normally the shortest element

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Polarization diversity
B	Higher gain per element than a Yagi antenna
C	Wide bandwidth
D	Harmonic suppression

34. - G0A09

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

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

35. - G0B12

What is the purpose of a power supply interlock?

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

Figure G7-1