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. - G1A05

Which of the following frequencies is in the General Class portion of the 40-meter band?

Select	Answer
A	7.250 MHz
B	40.200 MHz
C	40.500 MHz
D	7.500 MHz

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. - 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	19.6 kilobaud
C	1200 baud
D	56 kilobaud

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

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	Lower sideband
C	Upper sideband
D	Vestigial sideband

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	Report the interference to your local Amateur Auxiliary Coordinator
B	Tell the interfering stations to change frequency
C	As a common courtesy, move your contact to another frequency
D	Increase power to overcome interference

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	We have already confirmed by card
B	We have worked before
C	I acknowledge receipt
D	Send slower

9. - G2D05

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country is a member of the International Amateur Radio Union
B	When the contact is with amateurs in any country as long as the communication is conducted in English
C	Only when the foreign country has a formal third party agreement filed with the FCC
D	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

10. - G2E04

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

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

11. - G3A12

What does the K-index indicate?

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

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

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is through ground waves which absorb most of the signal energy
B	Only a small part of the signal energy is scattered into the skip zone
C	Signals are scattered from the magnetosphere which is not a good reflector
D	Propagations is through ducts in F region which absorb most of the energy

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 reduce distortion due to excessive drive
C	To increase overall efficiency
D	To balance the transmitter audio frequency response

15. - G4B13

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

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

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	The ground rod is resonant
B	Flat braid rather than round wire has been used for the ground wire
C	Insulated wire has been used for the ground wire
D	The ground wire has high impedance on that frequency

17. - G4D03

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

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

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

19. - G5A01

What is impedance?

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

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. - G5C06

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

Select	Answer
A	2370 volts
B	26.7 volts
C	540 volts
D	5.9 volts

22. - G6A18

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	Large values of inductance may be obtained
B	All of these choices are correct
C	Most of the magnetic field is contained in the core
D	The magnetic properties of the core may be optimized for a specific range of frequencies

23. - G6B14

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

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

24. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 4
B	Symbol 11
C	Symbol 1
D	Symbol 5

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class C
C	Class A
D	Class B

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Relatively high power output
B	Variable frequency with the stability of a crystal oscillator
C	Relatively low power consumption
D	Wide tuning range and no need for band switching

27. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Phase modulation
B	Multiplex modulation
C	Amplitude modulation
D	Pulse modulation

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is always half the symbol rate
B	Lower symbol rates require wider bandwidth
C	Higher symbol rates require wider bandwidth
D	Symbol rate and bandwidth are not related

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It sends the packet back to the transmitting station
B	It terminates the contact
C	It requests the packet be retransmitted
D	It requests a change in transmitting protocol

30. - G9A11

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 50 ohm impedance?

Select	Answer
A	1:1
B	0:0
C	2:1
D	50:50

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It is unaffected by the height above ground
B	It steadily increases
C	It steadily decreases
D	It peaks at about 1/8 wavelength above ground

32. - G9C08

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

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

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Impedance varies periodically 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	Gain varies logarithmically as a function of frequency

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Use an antenna with a higher front-to-back ratio
B	Change to a non-polarized antenna with higher gain
C	Post a warning sign that is clearly visible to the neighbor
D	Take precautions to ensure that the antenna cannot be pointed in their direction

35. - G0B11

Which of the following is good practice for lightning protection grounds?

Select	Answer
A	Lightning grounds must be connected to all ungrounded wiring
B	They must be bonded to all buried water and gas lines
C	Bends in ground wires must be made as close as possible to a right angle
D	They must be bonded together with all other grounds

Figure G7-1