Intro Exam

Question 1

What does index of refraction mean?

Answer 1

It is a ratio of speed of light in a vacuum
speed of light in glass

Question 2

Core diameter of MMF

Answer 2

50mm to 62.5mm

Question 3

Cor diameter of SMF

Answer 3

9 microns

Question 4

Wavelength of MMF

Answer 4

850nm -1300nm

Question 5

Wavelength of SMF

Answer 5

1301nm - 1550nm

Question 6

MMF patch cord color

Answer 6

Orange

Question 7

SMF patch cord color

Answer 7

Yellow

Question 8

What is attenuation?

Answer 8

Loss in Db

Question 9

5 benefits of fiber

Answer 9

1) More information
2) Faster
3) Farther
4) Not subject to EMI
5) More secure

Question 10

What is Modal dispersion?

Answer 10

Occurs in step index MMF, multiple rays arrive at different times, causing distortion.

Question 11

What are the 3 layers of fiber?

Answer 11

Buffer coat, cladding, core.

Question 12

What is the purpose of the buffer coat?

Answer 12

To identify and protect the fiber

Question 13

What does OFNP mean?

Answer 13

Optical fiber non-conductive plenum

Question 14

What does OFCR mean?

Answer 14

Optical fiber conductive riser

Question 15

What are the optical fiber colors in order?

Answer 15

Blue
Orange
Green
Brown
Slate
White
Red
Black
Yellow
Violet
Rose
Aqua

Question 16

Optical power is measured in?

Answer 16

dBm

Question 17

Optical loss is measured in?

Answer 17

dB

Question 18

What makes up a fiber data link?

Answer 18

A light source (transmitter)
The fiber
A light detector (reciever)
Connectors (ferrule)

Question 19

What does 62.5/125 mean?

Answer 19

Core size/cladding size
(This is MMF)

Question 20

In graded index optical fiber the index profile approximates a parabola. What is the benefit to this?

Answer 20

Reduced modal dispersion

Question 21

What is single mode fiber used for?

Answer 21

Long distance telecommunications

Question 22

What is step index multimode fiber used for?

Answer 22

Efficient source power coupling

Question 23

What is graded index multimode fiber used for?

Answer 23

Data communications

Question 24

What is the largest cause of attenuation in fiber?

Answer 24

Scattering

Question 25

Where is fiber used?

Answer 25

LAN CatV (community antenna television) Telecom

Question 26

What does FTTC mean?

Answer 26

Fiber to the curb

Question 27

What does FTTH mean?

Answer 27

Fiber to the home

Question 28

What is a intrinsic loss?

Answer 28

Defects in the fiber

Question 29

What is a extrinsic loss?

Answer 29

Defects from handling fiber

Question 30

What does TIA stand for?

Answer 30

Telecommunications Industry Association

Question 31

What does EIA stand for?

Answer 31

Electronic Industries Alliance

Question 32

What safety PPE needs to be worn when handling fiber?

Answer 32

Glasses Long sleeve shirt Pants Closed toe shoes

Question 33

How to be safe working with fiber.

Answer 33

1) Use tape bed when stripping fiber 2) Bring enclosed container for fiber scraps 3) Use rubber mat to work on 4) Do not look down fiber unless your sure no light is going down the glass 5) tape unterminated ends 6) work in well ventilated areas 7) do not smoke, eat or drink when working with fiber. 8) do not rub eyes, face or any other exposed skin when working with fiber