FOA Reference Guide To Outside Plant Fiber Optics And Study Guide To FOA Certification
Answers To Chapter Questions
Chapter 10 Quiz - OSP Installation
True/False Indicate whether the statement is true or false.
1.
One should be able to rely the contractor to not only do the
installation but to assist in the design of the network and help choose
components and vendors.
ANSWER: T The contractor should have
experience in a fiber optic project from design through final testing
and be able to assist the customer in all aspects of the project.
2. All metal components of the cabling system installed in a equipment or telecom room must be grounded and bonded.
ANSWER: T For electrical safety, all conductive parts of the system, including hardware, must be properly grounded and bonded.
3. A single outside plant link may include several types of installation, including aerial, buried and underground.
ANSWER: T It’s
not uncommon for an OSP link to have several types of installation
processes. Even underwater crossings of rivers or lakes are not
uncommon.
Multiple Choice Identify the choice that best completes the statement or answers the question.
4. __________ will facilitate installation, allow better planning for upgrades and simplify testing. A. Good workmanship B. Low loss connectors C. Safe workplace procedures D. Proper documentation ANSWER: D Good documentation helps everywhere, even after the completion of the project for restoration.
5. 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 OSP cables are installed in all these ways which are quite different in process.
6. The protective gear every VDV installer must always wear is __________. A. Eye protection B. Plastic apron C. Gloves D. Shoe covers
ANSWER: A Every
part of the installation process involves hazards to the eyes. Eye
protection is needed for all installers, particularly to prevent fiber
scraps from harming the eyes.
7. The fiberglass rod inside many fiber optic cables is for __________. A. Increasing the pulling tension B. Limit bend radius to preventing kinking C. Winding the fibers around D. Tying to messenger cables
ANSWER: B The
primary use for the fiberglass rod in the center of the cable is to
limit the bend radius to prevent kinking, but use as a strength member,
along with the aramid fiber strength members, is a secondary use.
8. To prevent the cable from twisting when pulling it __________. A. Use a swivel eye B. Pull with braided rope C. Spin the cable off the spool D. Lubricate the cable
ANSWER: A Pulling ropes sometimes unwind under tension so the swivel prevents it causing cable twists.
9. On long pulls, at intermediate points, why do you lay the cable in a ‘figure 8‘? A. Keep it from getting tangled with the pull rope B. Make it easier to spray on lubricant C. Keep workers from walking on it D. Prevent it from twisting
ANSWER: D Each
coil in the "figure 8" puts a half-twist into the cable then does a
half-twist in the opposite direction to remove any twisting.
10. Under pulling tension, the bend radius should not be less than __________. A. 5 times the cable diameter B. 10 times the cable diameter C. 20 times the cable diameter D. 50 times the cable diameter
ANSWER: C The guidelines are 20 times the cable diameter under tension, 10 times under no pulling tension.
11.
Underground cables are pulled in conduit that is buried underground,
usually ______ deep to reduce the likelihood of accidentally being dug
up. . A. 3-4 feet (1-1.2 meters) B. 1-2 feet (0.3-0.5 meter) C. 6-8 feet (2-2.5 meters) D. As deep as the local building codes allow
ANSWER: A Most
cables are installed about 3 feet or 1 meter underground to protect the
cable. A marker tape is usually buried above the cable.
12. Cable ties used on fiber optic cables __________. A. Should be tightened firmly to prevent cable movement B. Can be used to hang cables from J-hooks or cable trays C. Should be rated for the weight of the cables D. Can harm cables if too tight, so they should be hand-tightened
ANSWER: D Tightening
cable ties can put harmful stress on the fibers (or pairs in UTP copper
cables), so hand tighten them and cut off the excess length. Even
better, use soft "hook and loop" ties that can be reopened to move
cables.
13. Where the ________ is appropriate, direct burial installation allows for fast installation. A. Local permit B. Ground C. Cost D. Cable ANSWER: B Direct burial requires the ground be relatively easy to plow or trench and not have a large number of rocks.
14.
Each completed splice on an installed cable should be tested with an
__________, preferably immediately after it is spliced. A. OLTS B. OTDR C. VFL D. CD test set
ANSWER: B While
most fusion splicers give an estimate of splice loss, only an OTDR can
verify the actual loss, although it needs bidirectional testing to get
higher accuracy.
15. If at all possible, _______________ before installing any other cables on utility poles. . A. Look for other installation options B. Have the power cables shut down C. Notify the proper authorities D. Notify the owners of other cables
ANSWER: B Working
around power lines can be dangerous, even with all dielectric fiber
optic cable because the hardware may be conductive and the installer
may be in close proximity to the power cables. With notice, most power
companies will cooperate.
Multiple Response Identify one or more choices that best complete the statement or answer the question.
16.
Long cable pulls in conduit may require ______ or _______ and your
installers need to know how to ”figure 8‘ cable to prevent kinking,. A. Heavy-duty mechanical pullers B. Trucks or tractors to pull the cable C. Lubricants D. Intermediate pulls
ANSWER: C,D Lubricants reduce friction to reduce pulling tension. Intermediate pulls are used when even lubrication reaches its limits.
17.
Most fiber optic cables do not have sufficient strength to allow direct
aerial installation, but ____ or _______ can be used to install them
aerially. A. Rubber clamps B. Pole-mounted grips C. Lashing to another cable D. Lashing to messenger strands
ANSWER: C,D Regular OSP cable can be lashed to a messenger or another cable for support in aerial applications.
18.
Aerial cables are subject to continual tension as well as extra tension
caused by ______, ______ and in some areas __________. A. Temperature changes B. Wind C. Rain D. Weight of ice
ANSWER: A,B,D Under
temperature changes, the cable will expand and contract causing changes
in tension. Wind and, in cold climates, ice also affect cable loading.
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