Name: module 1 lesson
Score: 0 / 14 points (0%)
OSP Basic Overview
After taking the test, you may print your answers for reference or to turn in as homework.
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1
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.
POINTS: 0 / 1