Optical Fibers_1 Objective Questions:


Que 1. Multi mode step index fiber has

a) Large core diameter & large numerical aperture
b) Large core diameter and small numerical aperture
c) Small core diameter and large numerical aperture
d) Small core diameter & small numerical aperture

Ans: a

Que 2. A multi mode step index fiber has a large core diameter of range
 
a) 100 to 300 µm
b) 100 to 300 nm
c) 200 to 500 µm
d) 200 to 500 nm

Ans: a

Que 3. Multi mode graded index fibers are manufactured from materials with
 
a) Lower purity
b) Higher purity than multimode step index fibers.
c) No impurity
d) Impurity as same as multimode step index fibers.

Ans: b

Que 4. Multi mode step index fibers have a bandwidth of
   
a) 2 to 30 MHz km
b) 6 to 50 MHz km
c) 10 to 40 MHz km
d) 8 to 40 MHz km

Ans: b

Que 5. Zeroes are defined as:
 
1) Roots of the denominator of the closed loop transfer function
2) Roots of the numerator of the closed loop transfer function
3) Parts of the numerator
4) Parts of the denominator

Ans: 2

Que 6. The performance characteristics of multi mode graded index fibers are_
 
a) Better than multimode step index fibers.
b) Same as multimode step index fibers.
c) Lesser than multimode step index fibers
d) Negligible

Ans: a

Que 7. Multi mode graded index fibers have overall buffer jackets same as multi mode step index fibers but have core diameters
 
a) Larger than multimode step index fibers.
b) Smaller than multimode step index fibers.
c) Same as that of multimode step index fibers.
d) Smaller than single mode step index fibers.

Ans: b

Que 8.  In single mode fibers, the most beneficial index profile is
 
a) Step index
b) Graded index
c) Step and graded index
d) Coaxial cable

Ans: b

Que 9. When optical fibers are to be installed in a working environment, the most important parameter to be considered is
 
a) Transmission property of the fiber
b) Mechanical property of the fiber
c) Core cladding ratio of the fiber
d) Numerical aperture of the fiber
 
Ans: b

Que 10. Optical fibers for communication use are mostly fabricated from

a) Plastic
b) Silica or multi component glass
c) Ceramics
d) Copper
 
Ans: b

These are most asked Optical Fibers mcqs with answers and most important Optical Fibers  interview and Viva question.
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