Deck 18: Fiber Optics

Question 1

The core of a fiber optic cable is composed of either ____ or plastic.

A) polyurethane
B) copper
C) silver
D) glass

Answer 1

D

Question 2

____ is generally used to examine the fiber optic connection for possible problems.

A) A magnifying glass
B) A telescope
C) The naked eye
D) A microscope

Answer 2

D

Question 3

The ____ type connector has become very popular for connecting fiber optic cables because it offers excellent alignment and has less back reflection than other types of connectors.

A) photodiode
B) threaded
C) push-pull
D) bayonet

Answer 3

C

Question 4

A type of multimode cable called ____ cable has a core made of concentric rings.

A) bandwidth
B) coaxial
C) graded
D) singular

Question 5

Briefly describe two conditions that generally account for poor connections in fiber optic systems.

Question 6

Discuss modal dispersion as it relates to single-mode and multimode cables.

Question 7

____ are preferred over other types of photo detection devices because of their speed of operation.

A) Photodiodes
B) LEDs
C) Transmitters
D) Prisms

Question 8

The ____ is the speed at which light can travel through a material.

A) optical property
B) diffractive index
C) internal reflection
D) vacuum ratio

Question 9

What are the advantages of fiber optic lighting over conventional lighting?

Question 10

Coaxial cable can carry about ____ mbps of data.

A) 0.1
B) 1.0
C) 10
D) 100

Question 11

In glass optical fibers, the index of refraction is approximately 1.46 to ____.

A) 1.48
B) 1.50
C) 1.51
D) 1.53

Question 12

Fiber optic cables are composed of three sections: the core, the ____, and the sheath.

A) jacket
B) cladding
C) skin
D) center

Question 13

What is the numerical aperture of a light source?

Question 14

____ is a measure of the range of colors that are emitted by the light source.

A) Wavelength
B) Spectral width
C) Emission variability
D) Receiving density

Question 15

There are three basic types of fiber optic connectors: the ____, the bayonet, and the push-pull.

A) LED
B) threaded
C) coaxial
D) photodiode

Question 16

Fiber optic cable is ____ electromagnetic interference.

A) totally immune to
B) highly susceptible to
C) less immune than copper wire to
D) unable to deal with

Question 17

Fiber optic lighting systems are composed of three primary sections: the ____, the cable, and the end fixtures.

A) crimp
B) illuminator
C) diode
D) battery

Question 18

The reason that light can travel through an optical fiber is because of ____.

A) linearity
B) diffraction
C) refraction
D) reflection

Question 19

With fiber optic systems, losses due to poor connection can be substantial. Losses are measured in ____.

A) meters
B) dollars
C) watts
D) decibels

Question 20

What is the oldest type of connector, and what are its limitations?