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	18155 kHz
B	24900 kHz
C	14250 kHz
D	21300 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

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

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	Extra, General and Technician
B	General and Technician
C	Technician only
D	General only

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Countries in ITU Region 1
B	Any country which is not a member of the International Amateur Radio Union (IARU)
C	Countries in ITU Region 2
D	Every foreign country, unless there is a third party agreement in effect with that country

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	Only one sideband and the carrier are transmitted; the other sideband is suppressed
C	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
D	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan for the operating mode you intend to use
B	Check to see if the channel is assigned to another station
C	Identify your station by transmitting your call sign at least 3 times
D	All of these choices are correct

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Listening for novice stations
C	Closing station now
D	Operating full break-in

9. - G2D10

What is QRP operation?

Select	Answer
A	Low power transmit operation
B	Remote piloted model control
C	Transmission using Quick Response Protocol
D	Traffic relay procedure net operation

10. - G2E08

In what segment of the 20-meter band are most PSK31 operations commonly found?

Select	Answer
A	At the top of the SSB phone segment, near 14.325 MHz
B	Below the RTTY segment, near 14.070 MHz
C	In the middle of the CW segment, near 14.100 MHz
D	At the bottom of the slow-scan TV segment, near 14.230 MHz

11. - G3A12

What does the K-index indicate?

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

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are completely absorbed by the ionosphere
B	They are bent and trapped in the ionosphere to circle the Earth
C	They pass through the ionosphere
D	They are bent back to the Earth

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	The ionospheric layer involved is unstable
D	Ground waves are absorbing much of the signal

14. - G4A02

What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

Select	Answer
A	More stations can be accommodated within a given signal passband
B	It may be possible to reduce or eliminate interference from other signals
C	Accidental out of band operation can be prevented
D	Interference from impulse noise will be eliminated

15. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio frequency range square wave signals of equal amplitude
B	Two swept frequency tones
C	Two non-harmonically related audio signals
D	Two audio signals of the same frequency shifted 90 degrees

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

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Decrease high-frequency voice output to prevent out of band operation
B	Increase transmitter bass response for more natural sounding SSB signals
C	Increase the intelligibility of transmitted phone signals during poor conditions
D	Prevent distortion of voice signals

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

19. - G5A04

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

Select	Answer
A	Conductance
B	Admittance
C	Reluctance
D	Reactance

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It decreases as more parallel branches are added to the circuit
B	It equals the average of each branch current
C	It equals the sum of the currents through each branch
D	It is the sum of the reciprocal of each individual voltage drop

21. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Capacitive coupling
B	Displacement current coupling
C	Mutual inductance
D	Mutual capacitance

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	The capacitor could overheat and explode
B	All of these choices are correct
C	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
D	Incorrect polarity can cause the capacitor to short-circuit

23. - G6B01

Which of the following is an analog integrated circuit?

Select	Answer
A	Microprocessor
B	NAND Gate
C	Frequency Counter
D	Linear voltage regulator

24. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	270 degrees
B	180 degrees
C	90 degrees
D	360 degrees

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	High Efficiency
B	Low standby power
C	No need for bias
D	Low distortion

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	Phase inverter
B	Discriminator
C	Product detector
D	Mixer

27. - G8A04

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

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

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

29. - G8C12

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

Select	Answer
A	Volumetric
B	Binary
C	Viterbi
D	Varicode

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	1:5
B	2:1
C	50:1
D	5:1

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower ground reflection losses
B	Shorter Radials
C	Lower radiation resistance
D	Lower feed point impedance

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

Select	Answer
A	Approximately 6 dB higher
B	Approximately 3 dB higher
C	Approximately 1.5 dB higher
D	Approximately 9 dB higher

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A helical antenna for space reception
B	A very long and low directional receiving antenna
C	A vertical antenna
D	A broad-band mobile antenna

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should not be installed in a wet area
B	It should be installed such that it is protected against unauthorized access
C	It should not be installed higher than you can reach
D	It should limited to 10 feet in height

35. - G0B10

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

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