Question 1

The cable is normally covered with an outer plastic sheath to reduce _______________

Accepted Answer

A)  abrasion
B)  armor
C)  friction
D)  dispersion

Question 2

How many types of buffer jackets are used in fiber buffering?

Accepted Answer

A)  three
B)  one
C)  two
D)  four

Question 3

__________ can induce a considerable amount of attenuation in optical fibers.

Accepted Answer

A)  micro-bending
B)  dispersion
C)  diffusion of hydrogen
D)  radiation exposure

Question 4

The diffusion of hydrogen into optical fiber affects the ______________

Accepted Answer

A)  transmission of optical light in the fiber
B)  spectral attenuation characteristics of the fiber
C)  core of the fiber
D)  cladding of the fiber

Question 5

What does micro-bending losses depend on?

Accepted Answer

A)  core material
B)  refractive index
C)  diameter
D)  mode and wavelength D

Question 6

. ____________ results from small lateral forces exerted on the fiber during the cabling process.

Accepted Answer

A)  attenuation
B)  micro-bending
C)  dispersion
D)  stimulated emission

Question 7

The primary function of the structural member is load bearing.

Accepted Answer

A) True 
 B)False

Question 8

The cable must be designed such that the strain on the fiber in the cable does not exceed__________

Accepted Answer

A)  0.002%
B)  0.01%
C)  0.2%
D)  0.160%

Question 9

The fiber should be________________ to avoid deterioration of the optical transmission characteristics resulting from mode-coupling-induced micro-bending.

Accepted Answer

A)  free from irregular external pressure
B)  coupled with plastic
C)  large in diameter
D)  smooth and in a steady state

Question 10

An inclusion of one or more structural members in an optical fiber so as to serve as a cable core foundation around which the buffer fibers may be wrapped is called _____________

Accepted Answer

A)  attenuation
B)  splicing
C)  buffering
D)  stranding

Question 11

A measure of amount of optical fiber emitted from source that can be coupled into a fiber is termed as

Accepted Answer

A)  radiance
B)  angular power distribution
C)  coupling efficiency
D)  power-launching

Question 12

How many categories exists in case of cable design?

Accepted Answer

A)  two
B)  three
C)  one
D)  four B

Question 13

What is the Young's modulus of Kevlar, an aromatic polyester?

Accepted Answer

A)  9 ×1010Nm?2
B)  10 ×1010Nm?2
C)  12 ×1010Nm?2
D)  13 ×1010Nm?2

Question 14

Which statistics are used for calculations of strengths of optical fibers?

Accepted Answer

A)  edwin statistics
B)  newton statistics
C)  wei-bull statistics
D)  gamma statistics

Question 15

Which of the following is not a strength member used in optical cable?

Accepted Answer

A)  steel wire
B)  germanium
C)  aramid yarns
D)  glass elements

Question 16

The losses caused due to hydrogen absorption mechanisms are in the range of

Accepted Answer

A)  20 db/km to25 db/km
B)  10 db/km to15 db/km
C)  25 db/km to50 db/km
D)  0 db/km to5 db/km

Question 17

When the stranding approach consists of individual elements (e.g. single-fiber or multi fiber loose tube buffer)  than the cable is termed as

Accepted Answer

A)  optical unit cable
B)  coaxial cable
C)  layer cable
D)  bare glass cable

Question 18

Stress corrosion must be considered while designing and testing optical fiber cables.

Accepted Answer

A) True 
 B)False  True

Question 19

How many forms of modal power distribution are considered?

Accepted Answer

A)  one
B)  two
C)  three
D)  four

Question 20

Microscopic meandering of the fiber core axis that is micro-bending is caused due to

Accepted Answer

A)  environmental effects
B)  rough edges of the fiber
C)  large diameter of core
D)  polarization

Exam 8: Various Aspects of Optical Fiber Design and Performance

The cable is normally covered with an outer plastic sheath to reduce _______________

Correct AnswerverifiedShow Answer

How many types of buffer jackets are used in fiber buffering?

Correct AnswerverifiedShow Answer

__________ can induce a considerable amount of attenuation in optical fibers.

Correct AnswerverifiedShow Answer

The diffusion of hydrogen into optical fiber affects the ______________

Correct AnswerverifiedShow Answer

What does micro-bending losses depend on?

Correct AnswerverifiedD

. ____________ results from small lateral forces exerted on the fiber during the cabling process.

Correct AnswerverifiedShow Answer

The primary function of the structural member is load bearing.

Correct AnswerverifiedShow Answer

The cable must be designed such that the strain on the fiber in the cable does not exceed__________

Correct AnswerverifiedShow Answer

The fiber should be________________ to avoid deterioration of the optical transmission characteristics resulting from mode-coupling-induced micro-bending.

Correct AnswerverifiedShow Answer

An inclusion of one or more structural members in an optical fiber so as to serve as a cable core foundation around which the buffer fibers may be wrapped is called _____________

Correct AnswerverifiedShow Answer

A measure of amount of optical fiber emitted from source that can be coupled into a fiber is termed as

Correct AnswerverifiedShow Answer

How many categories exists in case of cable design?

Correct AnswerverifiedB

What is the Young's modulus of Kevlar, an aromatic polyester?

Correct AnswerverifiedShow Answer

Which statistics are used for calculations of strengths of optical fibers?

Correct AnswerverifiedShow Answer

Which of the following is not a strength member used in optical cable?

Correct AnswerverifiedShow Answer

The losses caused due to hydrogen absorption mechanisms are in the range of

Correct AnswerverifiedShow Answer

When the stranding approach consists of individual elements (e.g. single-fiber or multi fiber loose tube buffer) than the cable is termed as

Correct AnswerverifiedShow Answer

Stress corrosion must be considered while designing and testing optical fiber cables.

Correct AnswerverifiedTrue

How many forms of modal power distribution are considered?

Correct AnswerverifiedShow Answer

Microscopic meandering of the fiber core axis that is micro-bending is caused due to

Correct AnswerverifiedShow Answer

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D

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B

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True

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