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Lesson Plan: Outside Plant Fiber Optics


Lesson #6, OSP Fiber Optic CableLevel: Technician

FOA Reference Guide To Outside Plant Fiber Optics
And Study Guide To FOA Certification

FOA Reference Guide to Fiber Optics

Answers To Chapter Questions



Chapter 6 Quiz - OSP Cable

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. Any cable that contains metallic conductors must be properly grounded and bonded.

ANSWER: T
Safety concerns and local electrical codes requires any cable containing electrical conductors must be properly grounded and bonded.

 2. In order to specify a fiber optic cable properly, you need to specify installation specifications as well as environmental specifications.

ANSWER: T
The cable specifications must consider the methods of installation as well as the environment the cable will be installed in.

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 
 3. Cables which contain both multimode and singlemode fibers are called __________.
A. Mixed cables
B. Hybrid cables
C. Composite cables
D. XC cables

ANSWER: B
Hybrid cables have both SM and MM fibers. Composite cables fibers and electrical conductors (not just metallic strength members.)

 4. Cables with metallic conductors as well as fiber are called __________.
A. Mixed cables
B. Hybrid cables
C. Composite cables
D. XC cables
 
ANSWER: C
Hybrid cables have both SM and MM fibers. Composite cables fibers and electrical conductors (not just metallic strength members.)

 5. No cable should be installed indoors unless it __________.
A. Is UL listed for flame retardancy for NEC
B. Is colored orange to indicate fiber optics
C. Is enclosed in innerduct or conduit
D. The length is printed on the cable jacket

ANSWER: A
Indoor cables must be tested and rated for fire retardance to meet fiber codes.

 6. ALL outdoor cables are specifically designed to __________.
A. Include large numbers of fibers
B. Be direct buried for ease of installation
C. Prevent rodent damage to the cable
D. Prevent moisture damage to the fiber

ANSWER:  D
No matter where the cable is going to be installed outdoors, it must be designed to withstand moisture penetration.

 7.  The design of cables of small size with very large fiber counts is usually __________.
A. Loose tube
B. Ribbon
C. Tight buffer

ANSWER: B
Ribbon cables have the highest density of fibers for a given size cable.

 8. The design of cables for high pulling tension in outside plant installations is usually __________.
A. Loose tube
B. Ribbon
C. Tight buffer

ANSWER: A
Loose tube cables have the highest pulling strength.

 9. Cables should always be pulled with __________ to prevent damage.
A. Nylon rope
B. Kellums grip on the jacket
C. Tension gage
D. The cable’s  strength members

ANSWER: D
All cables are designed to be pulled by the strength members.

 10. Loose tube cable requires a __________ to terminate directly with connectors, so often pigtails are spliced-on instead.
A. Splice closure
B. Breakout kit
C. Strain relief
D. Tube stuffer

ANSWER: B
The tiny 250 micron primary buffer coating on the fibers in a loose tube cable are too fragile to handle for termination so a breakout kit (also called a furcation kit) is installed to provide protection for the fibers.

 11. The minimum long term bend radius of installed fiber optic cable is usually specified as no less than __________.
A. 12 inches
B. 1 meter
C. 10 times the cable diameter
D. 20 times the cable diameter

ANSWER: C
The usual specification is 10X the cable diameter after installation - and under no tension - or 20X the cable diameter under tension.

 12. Black polyethylene jackets are used on outdoor cables for __________.
A. Abrasion resistance
B. High tensile load
C. Sunlight and moisture resistance
D. Appearance

ANSWER: C
PE provides good protection for moisture and when colored black, protection from UV rays from the sun.

Multiple Response
Identify one or more choices that best complete the statement or answer the question.

 13. Aerial cables must be designed and installed to withstand __________.
A. Continual tension from cable weight
B. Wind
C. Ice

ANSWER: A,B,C
The weight of the cable must be sustained between mounting poles by the strength of the cable, plus wind and ice can add to the tension.

 14. Armored cable is used in outside plant installations to __________ and ________.
A. Prevent rodent damage
B. Protect from damage from crushing
C. Increase pulling tension
D. Conduct lightning strikes

ANSWER: A,B
Armor can protect against rodent penetration or crushing by materials used to bury the cable. The armor is not generally used to increase pulling tension. Nothing protects against lightning!

 

Next: Lesson 7: Splicing and Termination
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Table of Contents: The FOA Reference Guide To Fiber Optics

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