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Specialty Wiring > Intro Exam > Flashcards

Intro Exam Flashcards

1
Q

What does index of refraction mean?

A

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

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2
Q

Core diameter of MMF

A

50mm to 62.5mm

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3
Q

Cor diameter of SMF

A

9 microns

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4
Q

Wavelength of MMF

A

850nm -1300nm

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5
Q

Wavelength of SMF

A

1301nm - 1550nm

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6
Q

MMF patch cord color

A

Orange

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7
Q

SMF patch cord color

A

Yellow

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8
Q

What is attenuation?

A

Loss in Db

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9
Q

5 benefits of fiber

A

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

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10
Q

What is Modal dispersion?

A

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

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11
Q

What are the 3 layers of fiber?

A

Buffer coat, cladding, core.

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12
Q

What is the purpose of the buffer coat?

A

To identify and protect the fiber

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13
Q

What does OFNP mean?

A

Optical fiber non-conductive plenum

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14
Q

What does OFCR mean?

A

Optical fiber conductive riser

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15
Q

What are the optical fiber colors in order?

A

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

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16
Q

Optical power is measured in?

A

dBm

17
Q

Optical loss is measured in?

A

dB

18
Q

What makes up a fiber data link?

A

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

19
Q

What does 62.5/125 mean?

A

Core size/cladding size
(This is MMF)

20
Q

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

A

Reduced modal dispersion

21
Q

What is single mode fiber used for?

A

Long distance telecommunications

22
Q

What is step index multimode fiber used for?

A

Efficient source power coupling

23
Q

What is graded index multimode fiber used for?

A

Data communications

24
Q

What is the largest cause of attenuation in fiber?

A

Scattering

25
Q

Where is fiber used?

A

LAN
CatV (community antenna television)
Telecom

26
Q

What does FTTC mean?

A

Fiber to the curb

27
Q

What does FTTH mean?

A

Fiber to the home

28
Q

What is a intrinsic loss?

A

Defects in the fiber

29
Q

What is a extrinsic loss?

A

Defects from handling fiber

30
Q

What does TIA stand for?

A

Telecommunications Industry Association

31
Q

What does EIA stand for?

A

Electronic Industries Alliance

32
Q

What safety PPE needs to be worn when handling fiber?

A

Glasses
Long sleeve shirt
Pants
Closed toe shoes

33
Q

How to be safe working with fiber.

A

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

Specialty Wiring (1 decks)

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