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Assignment 14

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

T2B07 What could cause your FM signal to interfere with stations on nearby frequencies?
a.
Microphone gain too high, causing over-deviation
c.
Incorrect CTCSS Tone
b.
SWR too high
d.
All of these choices are correct
 

 2. 

T4A04 Where must a filter be installed to reduce harmonic emissions from your station?
a.
Between the transmitter and the antenna
c.
At the station power supply
b.
Between the receiver and the transmitter
d.
At the microphone
 

 3. 

T4A09 Which of the following could you use to cure distorted audio caused by RF current flowing on the shield of a microphone cable?
a.
Band-pass filter
c.
Preamplifier
b.
Low-pass filter
d.
Ferrite choke
 

 4. 

T4A10 What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver’s receive audio?
a.
The ignition system
c.
The electric fuel pump
b.
The alternator
d.
Anti-lock braking system controllers
 

 5. 

T4A12 What could be happening if another operator reports a variable high-pitched whine on the audio from your mobile transmitter?
a.
Your microphone is picking up noise from an open window
c.
You need to adjust your squelch control
b.
You have the volume on your receiver set too high
d.
Noise on the vehicle’s electrical system is being transmitted along with your speech audio
 

 6. 

T4B01 What may happen if a transmitter is operated with the microphone gain set too high?
a.
The output power might be too high
c.
The frequency might vary
b.
The output signal might become distorted
d.
The SWR might increase
 

 7. 

T4B05 Which of the following would reduce ignition interference to a receiver?
a.
Change frequency slightly
c.
Turn on the noise blanker
b.
Decrease the squelch setting
d.
Use the RIT control
 

 8. 

T6D12 Which of the following is a common reason to use shielded wire?
a.
To decrease the resistance of DC power connections
c.
To prevent coupling of unwanted signals to or from the wire
b.
To increase the current carrying capability of the wire
d.
To couple the wire to other signals
 

 9. 

T7B01 What can you do if you are told your FM handheld or mobile transceiver is over-deviating?
a.
Talk louder into the microphone
c.
Change to a higher power level
b.
Let the transceiver cool off
d.
Talk farther away from the microphone
 

 10. 

T7B02 What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?
a.
The receiver is unable to reject strong signals outside the AM or FM band
c.
The audio amplifier of the transmitter is overloaded
b.
The microphone gain of the transmitter is turned up too high
d.
The deviation of an FM transmitter is set too low
 

 11. 

T7B03 Which of the following may be a cause of radio frequency interference?
a.
Fundamental overload
c.
Spurious emissions
b.
Harmonics
d.
All of these choices are correct
 

 12. 

T7B04 Which of the following is a way to reduce or eliminate interference by an amateur transmitter to a nearby telephone?
a.
Put a filter on the amateur transmitter
c.
Reduce the SWR on the transmitter transmission line
b.
Reduce the microphone gain
d.
Put a RF filter on the telephone
 

 13. 

T7B05 How can overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated?
a.
Block the amateur signal with a filter at the antenna input of the affected receiver
c.
Switch the transmitter from FM to SSB
b.
Block the interfering signal with a filter on the amateur transmitter
d.
Switch the transmitter to a narrow-band mode
 

 14. 

T7B06 Which of the following actions should you take if a neighbor tells you that your station’s transmissions are interfering with their radio or TV reception?
a.
Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel
c.
Tell them that your license gives you the right to transmit and nothing can be done to reduce the interference
b.
Immediately turn off your transmitter and contact the nearest FCC office for assistance
d.
Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated
 

 15. 

T7B07 Which of the following may be useful in correcting a radio frequency interference problem?
a.
Snap-on ferrite chokes
c.
Band-reject and band-pass filters
b.
Low-pass and high-pass filters
d.
All of these choices are correct
 

 16. 

T7B08 What should you do if something in a neighbor’s home is causing harmful interference to your amateur station?
a.
Work with your neighbor to identify the offending device
c.
Check your station and make sure it meets the standards of good amateur practice
b.
Politely inform your neighbor about the rules that prohibit the use of devices which cause interference
d.
All of these choices are correct
 

 17. 

T7B09 What is a Part 15 device?
a.
An unlicensed device that may emit low powered radio signals on frequencies used by a licensed service
c.
A device for long distance communications using special codes sanctioned by the International Amateur Radio Union
b.
A type of amateur radio that can legally be used in the citizen’s band
d.
A type of test set used to determine whether a transmitter is in compliance with FCC regulation 91.15
 

 18. 

T7B10 What might be the problem if you receive a report that your audio signal through the repeater is distorted or unintelligible?
a.
Your transmitter may be slightly off frequency
c.
You could be in a bad location
b.
Your batteries may be running low
d.
All of these choices are correct
 

 19. 

T7B11 What is a symptom of RF feedback in a transmitter or transceiver?
a.
Excessive SWR at the antenna connection
c.
Reports of garbled, distorted, or unintelligible transmissions
b.
The transmitter will not stay on the desired frequency
d.
Frequent blowing of power supply fuses
 

 20. 

T7B12 What might be the first step to resolve cable TV interference from your ham radio transmission?
a.
Add a low pass filter to the TV antenna input
c.
Add a preamplifier to the TV antenna input
b.
Add a high pass filter to the TV antenna input
d.
Be sure all TV coaxial connectors are installed properly
 



 
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