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 may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band
C	Amateur stations are allowed to use the band only during emergencies
D	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station

2. - G1B11

How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?

Select	Answer
A	All of these choices are correct
B	In conformance with good engineering and good amateur practice
C	In conformance with Amateur Radio custom
D	In conformance with the rules of the IARU

3. - G1C03

What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	1.8 kHz
B	3 kHz
C	2.8 kHz
D	5.6 kHz

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

5. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	No third party traffic maybe be transmitted
B	The station initiating the contact must be under local or remote control
C	The interrogating transmission must be made by another automatically controlled station
D	The control operator of the interrogating station must hold an Extra Class license

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

8. - G2C11

What does the Q signal "QRV" mean?

Select	Answer
A	I am quitting for the day
B	There is interference on the frequency
C	You are sending too fast
D	I am ready to receive messages

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
B	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	DSB
B	LSB
C	USB
D	CW

11. - G3A08

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

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

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

14. - G4A05

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

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

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

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding an additional insulating jacket to the cable
B	Adding shunt inductors to the conductors
C	Placing a ferrite choke around the cable
D	Adding series capacitors to the conductors

17. - G4D04

What does an S meter measure?

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

18. - G4E07

Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?

Select	Answer
A	The vehicle control computer
B	The battery charging system
C	The fuel delivery system
D	All of these choices are correct

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance decreases

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	8.75 watts
B	2500 watts
C	5000 watts
D	625 watts

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. - G6A05

What is the approximate junction threshold voltage of a conventional silicon diode?

Select	Answer
A	1.0 volts
B	0.1 volt
C	0.3 volts
D	0.7 volts

23. - G6B08

How is an LED biased when emitting light?

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

24. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 11
C	Symbol 1
D	Symbol 7

25. - G7B03

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

Select	Answer
A	Output is low when either or both inputs are high
B	Output is high only when 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. - G7C09

Which of the following is needed for a Digital Signal Processor IF filter?

Select	Answer
A	A digital processor chip
B	All of the these choices are correct
C	A digital to analog converter
D	An analog to digital converter

27. - G8A04

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

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

28. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Mixer interference
B	Quadrature noise
C	Image response
D	Intermediate interference

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The version of the PSK protocol
B	The year in which PSK31 was invented
C	The approximate transmitted symbol rate
D	The number of characters that can be represented by PSK31

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	300 ohms
B	50 ohms
C	100 ohms
D	75 ohms

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	84 feet
C	131 feet
D	42 feet

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The relative position of the driven element with respect to the reflectors and directors
C	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
D	The number of directors versus the number of reflectors

33. - G9D05

What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

Select	Answer
A	It allows quick selection of vertical or horizontal polarization
B	It allows simultaneous vertical and horizontal polarization
C	It narrows the main lobe in elevation
D	It narrows the main lobe in azimuth

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

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	Solder has too high a dielectric constant to provide adequate lightning protection
B	A soldered joint will likely be destroyed by the heat of a lightning strike
C	The resistance of solder is too high
D	Solder flux will prevent a low conductivity connection

Figure G7-1