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 if they do not cause harmful interference to primary users
B	Amateur stations are allowed to use the band only during emergencies
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 may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	When it is transmitted on frequencies above 1215 MHz
B	At any time, as long as it produces no spurious emissions
C	When it is an incidental part of a manned space craft retransmission
D	When it is unintentionally transmitted from the background at the transmitter

3. - G1C02

What is the maximum transmitting power an amateur station may use on the 12-meter band?

Select	Answer
A	200 watts PEP output
B	1500 watts PEP output
C	An effective radiated power equivalent to 100 watts from a half-wave dipole
D	50 watts PEP output

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Wireless Telecommunications Bureau
C	The Federal Communications Commission
D	A Volunteer Examiner Coordinator

5. - G1E05

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

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

6. - G2A05

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

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

7. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	A person holding an FCC issued amateur operator license or an appropriate government official
B	Only a RACES net control operator
C	Only a person holding an FCC issued amateur operator license
D	Any control operator when normal communication systems are operational

8. - G2C01

Which of the following describes full break-in telegraphy (QSK)?

Select	Answer
A	Transmitting stations can receive between code characters and elements
B	An operator must activate a manual send/receive switch before and after every transmission
C	Automatic keyers are used to send Morse code instead of hand keys
D	Breaking stations send the Morse code prosign BK

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	All of these choices are correct
B	Band and/or frequency of the contact
C	Date and time of contact
D	Call sign of station contacted and the signal report given

10. - G2E10

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

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

11. - G3A08

Which of the following effects can a geomagnetic storm have on radio propagation?

Select	Answer
A	Improved chances of UHF ducting
B	Improved ground-wave propagation
C	Degraded high-latitude HF propagation
D	Improved high-latitude HF propagation

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Check the strength of TV signals from Western Europe
B	Listen for signals from an international beacon in the frequency range you plan to use
C	Send a series of dots on the band and listen for echoes from your signal
D	Check the strength of signals in the MF AM broadcast band

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	They have high intelligibility
B	They have very large swings in signal strength
C	They have a wavering sound
D	All of these choices are correct

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Low input SWR
B	Excessive drive power
C	Shorting the input signal to ground
D	Insufficient drive power

15. - G4B13

What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Select	Answer
A	Measuring the front to back ratio of an antenna
B	Determining the impedance of an unknown or unmarked coaxial cable
C	Measuring the turns ratio of a power transformer
D	Determining the gain of a directional antenna

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

17. - G4D03

Which of the following can be the result of an incorrectly adjusted speech processor?

Select	Answer
A	Splatter
B	Excessive background pickup
C	Distorted speech
D	All of these choices are correct

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the battery using heavy gauge wire
B	To the alternator or generator using heavy gauge wire
C	To the alternator or generator using resistor wire
D	To the battery using resistor wire

19. - G5A11

Which of the following describes one method of impedance matching between two AC circuits?

Select	Answer
A	Increase the power output of the first circuit
B	Reduce the power output of the first circuit
C	Insert a circulator between the two circuits
D	Insert an LC network between the two circuits

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	25.9 percent
B	12.2 percent
C	20.5 percent
D	10.9 percent

21. - G5C10

What is the inductance of three 10 millihenry inductors connected in parallel?

Select	Answer
A	0.30 henrys
B	3.3 henrys
C	30 millihenrys
D	3.3 millihenrys

22. - G6A16

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

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

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Lower power consumption
B	Longer life
C	All of these choices are correct
D	Faster response time

24. - G7A08

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

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

25. - G7B04

Which of the following describes the function of a two input NOR gate?

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

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	Product detector
C	Discriminator
D	Phase inverter

27. - G8A05

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

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

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	60 kHz
B	416.7 Hz
C	5 kHz
D	101.75 Hz

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By transmitting redundant information with the data
B	By using a parity bit with each character
C	By controlling transmitter output power for optimum signal strength
D	By using the varicode character set

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

31. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It peaks at about 1/8 wavelength from the end
B	It steadily increases
C	It is unaffected by the location of the feed point
D	It steadily decreases

32. - G9C08

What is meant by the "main lobe" of a directive antenna?

Select	Answer
A	The direction of maximum radiated field strength from the antenna
B	The point of maximum current in a radiating antenna element
C	The maximum voltage standing wave point on a radiating element
D	The magnitude of the maximum vertical angle of radiation

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To prevent out of band operation
B	To notch spurious frequencies
C	To provide balanced feed point impedance
D	To permit multiband operation

34. - G0A11

What precaution should you take if you install an indoor transmitting antenna?

Select	Answer
A	Make sure that MPE limits are not exceeded in occupied areas
B	Make sure the antenna is properly shielded
C	Locate the antenna close to your operating position to minimize feed line radiation
D	Position the antenna along the edge of a wall to reduce parasitic radiation

35. - G0B13

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

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