FOA Reference Guide To Outside Plant Fiber Optics
And Study Guide To FOA Certification
Answers To Chapter Questions
Chapter 1 Quiz
True/False
Indicate whether the statement is true or false.
1. Most outside plant installations are singlemode fiber.
ANSWER: T
The longer lengths and often higher bandwidth requirements of OSP cabling mean singlemode fiber is needed.
2. Splicing is rare in premises networks.
ANSWER: T
Although
OSP networks often require splicing cables for long runs, premises
cabling is generally installed and terminated directly or uses
preterminated cables.
3. Fiber is used in long distance phone networks because it is much cheaper than copper wire.
ANSWER: T
The
higher bandwidth and longer distance capability of fiber makes it
cost only a few percent as much as copper which can carry fewer
transmissions and requires regeneration at short distances.
4.
Light from fiber optic cables is bright and easily visible.
ANSWER: F
Most
fiber optic links use light in the infrared because glass has lower
attenuation in the infrared and infrared light is invisible to the
human eye.
5. Besides causing attenuation, dirt particles can cause scratches on the polished fiber ends.
ANSWER: T
Much dirt is silica (sand) based and hard enough to scratch glass.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
6. Outside plant cabling can be installed by __________.
A. Pulling in underground in conduit
B. Direct burial
C. Aerial suspension
D. All of the above
ANSWER: D
All these methods - plus installation underwater - are used for OSP installations.
7. Underground cable generally includes a gel, powder or tape for protection from __________.
A. Pulling friction
B. Lightning strikes
C. Moisture
D. Fiber abrasion
ANSWER: C
Gel or dry powder is included in cables to block moisture from harming fibers.
8. Armored cable is used in outside plant installations to __________.
A. Prevent crushing and rodent damage
B. Protect from dig-up damage
C. Increase pulling tension
D. Conduct lightning strikes
ANSWER: A
The armor in cable makes it stronger to resist crushing and the metal prevents rodents from penetrating the cable.
9. Concatenation or the joining of two cables in a long outside plant run is almost always done by __________.
A. Mechanical splicing
B. Fusion splicing
C. Field installation of connectors
D. Splicing on pigtailled connectors
ANSWER: B
Fusion
splicing has the lowest loss and reflectance, the greatest strength and
reliability and, in large volume installations, the lowest cost.
10. Premise cables in LAN backbones may contain __________.
A. Only multimode fiber
B. Only singlemode fiber
C. Both multimode and singlemode fiber
D. Plastic optical fiber
ANSWER: C
While
most premises communications systems use multimode fibers, singlemode
fibers may be included for phone systems, CATV and higher speed LANs.
11. Premises cables must be rated for __________ to meet codes.
A. Pull strength
B. Bend radius
C. Weight in cable trays
D. Fire retardance
ANSWER: D
The
materials used in making premises cables must be chosen for fire
retardance for safety and tested by appropriate ratings groups.
12. The protective gear every VDV installer must always wear is __________.
A. Eye protection
B. Plastic apron
C. Gloves
D. Shoe covers
ANSWER: A
Most
installation processes involve eye hazards, especially from fiber
shards produced in cable preparation, splicing and termination.
13. Information on the safety of chemicals used in fiber optics are __________.
A. Available from National Institutes of Health
B. In MSDS sheets supplied by manufacturers
C. Required to be in every installer’s tool kit
D. Rarely useful
ANSWER: B
MSDS or material safety data sheets are available from manufacturers that detail specific safety issues for each chemical.
14. Always keep __________ on connectors when not connected to equipment or being tested.
A. Mating adapters
B. Strain relief boots
C. Sticky tape
D. Dust caps
ANSWER: D
Dust caps protect the end of the connector ferrule from dirt, scratches and other physical damage.
- Next: Lesson 2: Fiber Optic Jargon - The Language of Fiber Optics
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