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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations are allowed to use the band only during emergencies
B	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band
C	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
D	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users

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 ITU
C	The Control Operator
D	The FCC

3. - G1C06

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

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

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	21 years
B	18 years
C	12 years
D	There is no age limit

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 using a band where the Amateur Service is secondary
B	All of these choices are correct
C	When operating within one mile of an FCC Monitoring Station
D	When a station is transmitting spread spectrum emissions

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	Lower sideband
C	Vestigial sideband
D	Upper sideband

7. - G2B01

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

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

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Sending without error
B	Matching the speed of the transmitting station
C	Matching your transmit frequency to the frequency of a received signal
D	Operating split to avoid interference on frequency

9. - G2D04

Which of the following describes an azimuthal projection map?

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

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send QRL in Morse code
B	Transmit a connect message on the station's published frequency
C	Respond when the station broadcasts its SSID
D	Send an email to the system control operator

11. - G3A01

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

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

12. - G3B12

What factor or factors affect the MUF?

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

13. - G3C07

What makes HF scatter signals often sound distorted?

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

14. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

Select	Answer
A	To reduce harmonic radiation
B	To balance the transmitter audio frequency response
C	To reduce distortion due to excessive drive
D	To increase overall efficiency

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

16. - G4C09

How can a ground loop be avoided?

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

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 to 14.647 MHz
B	14.347 to 14.350 MHz
C	14.3455 to 14.3485 MHz
D	14.344 to 14.347 MHz

18. - G4E11

Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

Select	Answer
A	A large energy storage system is needed to supply power when the wind is not blowing
B	All of these choices are correct
C	The voltage and current ratings of such systems are not compatible with amateur equipment
D	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent

19. - G5A01

What is impedance?

Select	Answer
A	The force of repulsion between two similar electric fields
B	The electric charge stored by a capacitor
C	The opposition to the flow of current in an AC circuit
D	The inverse of resistance

20. - G5B11

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

Select	Answer
A	1.414
B	0.707
C	1.00
D	2.00

21. - G5C03

Which of the following components should be added to an existing resistor to increase the resistance?

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

22. - G6A16

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

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

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Beyond cutoff
B	At the Zener voltage
C	Forward Biased
D	Reverse Biased

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Fewer circuit components are required
B	High frequency operation allows the use of smaller components
C	Faster switching time makes higher output voltage possible
D	All of these choices are correct

25. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	SSB
C	All of these choices are correct
D	CW

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	Phase inverter
D	Product detector

27. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	The RF clipping level
B	Transmit audio or microphone gain
C	Antenna inductance or capacitance
D	Attenuator level

28. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	All of these choices are correct
B	Some modes have high duty cycles which could exceed the transmitter's average power rating.
C	To aid in tuning your transmitter
D	To allow time for the other station to break in during a transmission

29. - G8C05

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

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

30. - G9A15

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

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

31. - G9B12

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

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

32. - G9C04

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

Select	Answer
A	All of the elements must be the same length
B	The director is normally the longest element
C	The reflector 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 present low impedance on all design frequencies
C	They must be fed with open wire line
D	They must be used with an antenna tuner

34. - G0A07

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

Select	Answer
A	A higher 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 lower transmitter duty cycle permits greater short-term exposure levels

35. - G0B13

What must you do when powering your house from an emergency generator?

Select	Answer
A	Insure that the generator is not grounded
B	Disconnect the incoming utility power feed
C	All of these choices are correct
D	Insure that all lightning grounds are disconnected