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self test
1.
A physics principle that became the
theoretical foundation of optical fiber communications holds that ______ in a
______ medium can carry more information over longer distances.
a.
|
Light; coaxial
|
b.
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Electrical signals;
glass
|
c.
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Light;
glass
|
d.
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Electrical signals;
copper
|
- Single-mode fiber was the first type of fiber to be
commercialized.
a.
|
True
|
b.
|
False
|
- What are the three primary steps in the optical fiber
manufacturing process?
a.
|
Letdown,
compilation, and draw
|
b.
|
Assembly,
consolidation, and pull
|
c.
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Letdown,
consolidation, and draw
|
d.
|
Assembly,
compilation, and pull
|
- Which of the following is not a characteristic of the fiber
produced by the OVD process?
a.
|
Less attenuation
|
b.
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Infinite
flexibility
|
c.
|
Exceptional strength
|
d.
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Fewer flaws
|
- Fiber curl is exhibited by all fibers.
a.
|
True
|
b.
|
False
|
- Attenuation is which of the following?
a.
|
The inherent
curvature along a specific length of optical fiber
|
b.
|
The wavelength above
which a single-mode fiber supports only one mode or ray of light
|
c.
|
The
reduction of signal strength over the length of the light-carrying medium
|
d.
|
Smearing an optical
signal that results from the many discrete wavelength components traveling at
different rates
|
- Controlling the ____________ at which light waves are
transmitted makes it possible to control how efficiently they reach their
destination.
a.
|
Speed
|
b.
|
Angle
|
c.
|
Time
|
d.
|
Rate
|
- Dispersion is which of the following?
a.
|
The inherent
curvature along a specific length of optical fiber
|
b.
|
The wavelength above
which a single-mode fiber supports only one mode or ray of light
|
c.
|
The reduction of
signal strength over the length of the light-carrying medium
|
d.
|
Smearing an
optical signal that results from the many discrete wavelength components
traveling at different rates
|
- The longer the fiber is, the shorter the effective cutoff
wavelength will be.
a.
|
True
|
b.
|
False
|
- Mechanical splicing is the predominant choice of operators
for joining fibers.
a.
|
True
|
b.
|
False
|