Test 1

Question 1

Rayon is a natural fiber

Answer 1

false

Question 2

What is the name of the natural mineral fiber that was used for insulation?

Answer 2

Asbesto

Question 3

Kevlar was a fiber used for bullet proof vest. How would you classify it?

Answer 3

Manufactured Organic Synthetic Polymer

Question 4

Textile fibers are separted into two main caterogies

Answer 4

Natural and Manfactured

Question 5

All manufactured fibers are synthetic

Answer 5

False

Question 6

How would you classfiy cotton?

Answer 6

Natural Cellulose

Question 7

How would you classify wool?

Answer 7

Natural protein

Question 8

How would you classify Rayon?

Answer 8

Manufactured organic natural polymer

Question 9

How would you classify Olefin?

Answer 9

Manfucated organic synthetic polymer

Question 10

How would you classify fiberglass?

Answer 10

Manufactured inorganic

Question 11

Natural protein fibers come mainly from the hair of plants

Answer 11

False

Question 12

Flax is a natural cellulose….seed,bast,or leaf fiber

Answer 12

bast fiber

Question 13

Crimp fibers have more luster

Answer 13

false

Question 14

Crimp can only be added to thermoplastic fibers

Answer 14

false

Question 15

Fibers longer than 2 inches are called

Answer 15

long staple

Question 16

are manfauctured fibers uniform?

Answer 16

yes

Question 17

Linear density can be calculated from what?

Answer 17

mass and length, diameter and mass density

Question 18

are natural fibers uniform or nonuniform?

Answer 18

nonuniform

Question 19

is micronaire used to determine the fineness of polyester fibers?

Answer 19

no

Question 20

is micronaire related to fiber maturity?

Answer 20

yes

Question 21

is micronaire related to fiber fineness?

Answer 21

yes

Question 22

is micronaire an indirect measure of the fineness of a group of cotton fibers?

Answer 22

yes

Question 23

is micronaire a measure of the resistance of air flow through a sample of fibers?

Answer 23

yes

Question 24

melt spun fibers generally have an irregular cross section

Answer 24

true

Question 25

Generally one uses the () knob first to move the specimen toward the objective lens then moves the () knob for a refined image to look at various parts of the specimen.

Answer 25

coarse focus, fine focus

Question 26

The () connects the tube and the base and is often used to carry the microscope.

Answer 26

arm

Question 27

Solution spun fibers generally have an irregular cross section.

Answer 27

true

Question 28

Fiber cross sections can assist a person with identifying the fiber.

Answer 28

true

Question 29

What is the flat surface of the microscope where the slides are placed for viewing?

Answer 29

stage

Question 30

After the specimen image passes through the objective, the image is:

Answer 30

inverted

Question 31

Birefrignence causes anisotropic materials to change color when placed between 2 polarized films

Answer 31

true

Question 32

polymer in a fiber may be partially oriented

Answer 32

true

Question 33

by heating a filmanent without drawing we can increase the polymer orientation

Answer 33

false

Question 34

when you polymerize many monomers together end to end you create a

Answer 34

polymer

Question 35

temp at which portions of polymer chains not crystallied become mobile

Answer 35

glass transition temp

Question 36

temp at which portions of polymer chains embedded in crystals become mobile

Answer 36

melting point

Question 37

temp at which a polymer begins to degrade into components

Answer 37

decomposition temp

Question 38

fibers that have been properly drawn are

Answer 38

anisotropic, more crystalline stronger

Question 39

isotropic materials exhibit birefringence

Answer 39

false

Question 40

drawing increase the

Answer 40

size of crystalline units, percent of crystalline, the orientation of the polymer chains, the orientation of crystalline units

Question 41

How are the length of manufacured fibers determined and what is that process called?

Answer 41

manufacturing process

Question 42

Which type of mount would help you the most in identifying a fiber

Answer 42

longitudinal mount with polarized light

Question 43

protein fibers

Answer 43

composed of polymers of amino acids

Question 44

cellulosic fibers

Answer 44

formed from glucose

Question 45

mineral fibers

Answer 45

composed of silica obtained from rocks or sand

Question 46

synthetic fibers

Answer 46

polymers thar originate from small, organic molecules that combine w water and air

Question 47

linear density equation (denier)

Answer 47

9000*fiber length

Question 48

linear density equation (tex)

Answer 48

1000*fiber length

Question 49

flax

Answer 49

natural cellulose

Question 50

mohair

Answer 50

natural protein

Question 51

rayon

Answer 51

manufactured cellulose

Question 52

nylon

Answer 52

manufactured synthetic

Question 53

polyester

Answer 53

manufactured synthetic

Question 54

acyrlic

Answer 54

manufactured synthetic

Question 55

metallic

Answer 55

manfucatured inorganic

Question 56

crystalline region

Answer 56

parallel to each other

Question 57

amorphous region

Answer 57

randomly oriented

Question 58

anisotropic

Answer 58

not having the same physical properties