True/False Indicate whether the statement is true or false.
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1.
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Optical loss measured in dB is
always a negative number because lower power is a more negative number in a logarithmic scale like
dB.
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2.
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While we say a cable plant has
7dB lloss, the optical loss measured in dB is a negative number because lower power is a more
negative number in a logarithmic scale like dB.
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3.
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People erroneously think that
you strip the cladding from glass optical fiber becasue practically every drawing of fiber shows the
core separate from the cladding, indicating they are separate.
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4.
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Microcables with 144 fibers are
about the size of a pencil.
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5.
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A power budget is the amount of
optical loss the link electronics can tolerate - transmitter to receiver.
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6.
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Nanotrenching was a great
success for Google Fiber in Louisville, saving installation cost and providing a long-lasting
reliable installation.
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7.
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Even if one connector ferrule
end face is dirty, it will not transfer to another connector or contaminate any connector it is mated
to.
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8.
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There have been new connectors
introduced but none smaller than the current LC.
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Multiple
Choice Identify the choice
that best completes the statement or answers the question.
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9.
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If you measure a change in
optical power where the new power is 10 times higher than the first measurement, the dB difference is
_______.
a. | +10dB | b. | -10dB | c. | 0dB | d. | +10dBm |
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10.
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If you are measuring loss of a
cable plant that has 7dB loss and your meter reference is -15dBm, what will the power reading be
after the loss?
a. | -15dBm | b. | -8dBm | c. | -22dBm | d. | -15.7dBm |
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11.
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The 2-cable reference method
for making insertion loss measurements ________.
a. | Includes a connection loss when
making the “0dB” reference | b. | Measures a loss lower by the loss of the connection when setting the
“0dB” reference | c. | Has higher measurement uncertainty than a 1-cable
reference | d. | All of the above |
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12.
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When you strip optical fiber to
splce or terminate it, you are stripping off the ___________.
a. | Core | b. | Cladding | c. | Buffer coating | d. | Both the cladding and the buffer |
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13.
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LANs and data links in data
centers are moving to singlemode fiber because __________.
a. | Network speeds are too high for
multimode fiber | b. | LANs are getting bigger and links are longer | c. | Multimode fiber is in short
supply | d. | You can get more singlemode fiber in small
cables |
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14.
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What kind of fiber is
this?
a. | OM5 wideband
fiber | b. | 50/125 bend-insensitive fiber | c. | Legacy OM1 fber | d. | Singlemode |
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15.
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Signals traveling in optical
fiber are traveling at the “speed of light” indicated by the letter “C,” but
in an optical fiber that speed is really _________________.
a. | C =300,000 km/s
| b. | About 2/3C = 205,000 km/s or C/index
of refraction of glass | c. | The speed of light in a vacuum | d. | Faster than a speedling
bullet |
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16.
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Splice-on connectors use a
________ for termination.
a. | Fusion
splicer | b. | Mass fusion splicer | c. | Mechancal splice | d. | Epoxy/polish
termination |
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17.
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Regular (not bend-insensitive)
singlemode fiber is most sensitive to bending losses at ___________ wavelength.
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18.
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On high fiber count cables,
ribbon splicing wil be about ____ times faster than single fiber splicing
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Multiple
Response Identify one or
more choices that best complete the statement or answer the question.
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19.
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A link loss budget for a fiber
optic link will include _________. (Choose all that are included in a loss
budget..)
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20.
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High fiber count cables are
generally made with ________ . (Check all answers that are correct.)
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