Free Printable Optical Communication Unit-1 Quiz

1.

Major Advantages of Optical fiber

a)

High Bandwidth, high Loss

b)

Low Bandwidth, Low Loss

c)

High Bandwidth, Low Loss

2.

Refractive index FORMULA?

a)

n=c

b)

n=v

c)

n=v/c

d)

n=c/v

3.

Multimode 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

4.

At what speed an optical fiber can transmit data to a very long distance

a)

15GB/second

b)

10GB/second

c)

20GB/second

d)

5GB/second

5.

Which of the following is a content of an Optical fiber?

a)

Jacket

b)

Core

c)

Buffer

d)

All of the above

6.

The performance characteristics of multimode graded index fibers are ___________

a)

Better than multimode step index fibers

b)

Same as multimode step index fibers

c)

Lesser than multimode step index

d)

Negligible

7.

Multimode step index fiber has a large core diameter of range is ___________

a)

a) 100 to 300 μm

b)

b) 100 to 300 nm

c)

c) 200 to 500 μm

d)

d) 200 to 500 nm

8.

Single mode fiber was designed to support

a)

Attenuation

curve

b)

Fibre

as zero dispersion

c)

Early

large haul transmission

d)

Negative

dispersion

9.

Multi

mode fibers are used in

a)

LANS

b)

WANS

c)

MANS

d)

WLANS

10.

Glass

fibre initial strength at

a)

100°F(520°c)

b)

100°F(540°c)

c)

100°F(560°c)

d)

100°F(500°c)

11.

How many propagation modes are present in single mode fibers?

a)

1

b)

2

c)

3

d)

4

12.

Non-zero dispersion fiber(NZDF) has zero dispersion near_____

a)

1450nm

b)

1680nm

c)

1540nm

d)

1650nm

13.

The refractive index of a medium is defined as the ratio of the velocity of _____ in a vacuum to the velocity of _____ in the medium.

a)

Air, Light

b)

Light,Air

c)

Air, Air

d)

Light, Light

14.

Refractive index of air and silica

a)

n=1.00 and n=1.45

b)

n=2.45

and n=1.33

c)

n=1.45

and n=1.00

d)

n=2.00

and n=3.45

15.

The core diameter of single mode fiber is

a)

9 or 10 to 125 nm

b)

50 to 125nm

c)

100 to 140 nm

d)

all the above

16.

The

refractive indexes of the core and cladding of a silica fiber are 1.55 and 1.52. what is the critical angle and

Numerical Aperture

a)

NA =

0.40, Φc=75.7

b)

NA =

0.30, Φc=78.7

c)

NA =

35.6, Φc=40.4

d)

NA =

0.77, Φc=20.5

17.

Which among the following do/does not support/s the soot formation process?

a)

VAD

b)

MCVD

c)

PCVD

d)

All of the above

Optical Communication Unit-1 Quiz

Total questions: 17

Worksheet time: 14mins

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