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. - G1A09

Which of the following frequencies is within the General Class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	18155 kHz
C	21300 kHz
D	24900 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only when the information is of a routine, personal nature
B	During a declared communications emergency
C	Only with Special Temporary Authorization from the FCC
D	To control a space station

3. - G1C11

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

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

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	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
B	The applicant must pass the current element 2 exam
C	They must have a letter from the FCC showing they once held an amateur or commercial license
D	There are no requirements other than being able to show a copy of the expired license

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

6. - G2A07

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

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
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. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When the President's War Emergency Powers have been invoked
B	When they declare a temporary state of communication emergency
C	Only when all amateur stations are instructed to stop transmitting
D	When they seize your equipment for use in disaster communications

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	KN
B	AR
C	SK
D	BK

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Direction finding used to locate stations violating FCC Rules
B	Identification of different call signs
C	Identification of out of band operation
D	Hunters have an opportunity to transmit on non-amateur frequencies

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

11. - G3A12

What does the K-index indicate?

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

12. - G3B11

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

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

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The long path azimuth of a distant station
C	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
D	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions

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. - G4B05

Why is high input impedance desirable for a voltmeter?

Select	Answer
A	It decreases battery consumption in the meter
B	It improves the frequency response
C	It decreases the loading on circuits being measured
D	It improves the resolution of the readings

16. - G4C07

What is one good way to avoid unwanted effects of stray RF energy in an amateur station?

Select	Answer
A	Install an RF filter in series with the ground wire
B	Use a ground loop for best conductivity
C	Install a few ferrite beads on the ground wire where it connects to your station
D	Connect all equipment grounds together

17. - G4D04

What does an S meter measure?

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

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	"Picket Fencing" signal variation
B	The antenna system
C	FCC rules limiting mobile output power on the 75-meter band
D	The wire gauge of the DC power line to the transceiver

19. - G5A04

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

Select	Answer
A	Conductance
B	Admittance
C	Reactance
D	Reluctance

20. - G5B06

What is the output PEP from a transmitter if an oscilloscope measures 200 volts peak-to-peak across a 50 ohm dummy load connected to the transmitter output?

Select	Answer
A	353.5 watts
B	1.4 watts
C	100 watts
D	400 watts

21. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	Additional resistance must be added in series with the primary to prevent overload
B	The transformer no longer functions as it is a unidirectional device
C	Additional resistance must be added in parallel with the secondary to prevent overload
D	The secondary voltage becomes 4 times the primary voltage

22. - G6A16

What will happen to the resistance if the temperature of a resistor is increased?

Select	Answer
A	It will change depending on the resistor's reactance coefficient
B	It will stay the same
C	It will change depending on the resistor's temperature coefficient
D	It will become time dependent

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A family of multiple circuit connectors suitable for audio and control signals
B	A special connector for microwave interfacing
C	A special watertight connector for use in marine applications
D	A DC power connector rated for currents between 30 and 50 amperes

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	One-half the normal peak output voltage of the power supply
B	One-half the normal output voltage of the power supply
C	Two times the normal peak output voltage of the power supply
D	Equal to the normal output voltage of the power supply

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is high only when both inputs are high
B	Output is high when either or both inputs are low
C	Output is low only when both inputs are high
D	Output is low when either or both inputs are high

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	Mixer
B	Discriminator
C	Product detector
D	Phase inverter

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient bandwidth
B	Insufficient audio
C	Excessive bandwidth
D	Frequency drift

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Heterodyning
B	Phase inverting
C	Cancellation
D	Synthesizing

29. - G8C05

In the PACTOR protocol, what is meant by an NAK response to a transmitted packet?

Select	Answer
A	The entire file has been received correctly
B	The receiver is requesting the packet be retransmitted
C	The receiver is reporting the packet was received without error
D	The receiver is busy decoding the packet

30. - G9A15

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	The higher the transmission line loss, the more the SWR will read artificially high
B	Transmission line loss does not affect the SWR measurement
C	The higher the transmission line loss, the more the SWR will read artificially low
D	The higher the transmission line loss, the more accurate the SWR measurement will be

31. - G9B04

What is the radiation pattern of a dipole antenna in free space in the plane of the conductor?

Select	Answer
A	It is a circle (equal radiation in all directions)
B	It is a figure-eight off both ends of the antenna
C	It has a pair of lobes on one side of the antenna and a single lobe on the other side
D	It is a figure-eight at right angles to the antenna

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

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Gain varies logarithmically as a function of frequency
B	Length and spacing of the elements increase logarithmically from one end of the boom to the other
C	SWR varies periodically as a function of boom length
D	Impedance varies periodically as a function of frequency

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	All of these choices are correct
B	Turn off the transmitter and disconnect the feed line
C	Ensure that you and the antenna structure are grounded
D	Wear a radiation badge

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	High voltages can cause lead-tin solder to disintegrate suddenly
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	RF energy can convert the lead into a poisonous gas
D	Tin in the solder can "cold flow" causing shorts in the circuit