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TMS 211 > Test 1 > Flashcards

Test 1 Flashcards

1
Q

Rayon is a natural fiber

A

false

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2
Q

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

A

Asbesto

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3
Q

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

A

Manufactured Organic Synthetic Polymer

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4
Q

Textile fibers are separted into two main caterogies

A

Natural and Manfactured

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5
Q

All manufactured fibers are synthetic

A

False

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6
Q

How would you classfiy cotton?

A

Natural Cellulose

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7
Q

How would you classify wool?

A

Natural protein

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8
Q

How would you classify Rayon?

A

Manufactured organic natural polymer

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9
Q

How would you classify Olefin?

A

Manfucated organic synthetic polymer

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10
Q

How would you classify fiberglass?

A

Manufactured inorganic

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11
Q

Natural protein fibers come mainly from the hair of plants

A

False

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12
Q

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

A

bast fiber

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13
Q

Crimp fibers have more luster

A

false

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14
Q

Crimp can only be added to thermoplastic fibers

A

false

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15
Q

Fibers longer than 2 inches are called

A

long staple

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16
Q

are manfauctured fibers uniform?

A

yes

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17
Q

Linear density can be calculated from what?

A

mass and length, diameter and mass density

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18
Q

are natural fibers uniform or nonuniform?

A

nonuniform

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19
Q

is micronaire used to determine the fineness of polyester fibers?

A

no

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20
Q

is micronaire related to fiber maturity?

A

yes

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21
Q

is micronaire related to fiber fineness?

A

yes

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22
Q

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

A

yes

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23
Q

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

A

yes

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24
Q

melt spun fibers generally have an irregular cross section

A

true

25
Q

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.

A

coarse focus, fine focus

26
Q

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

A

arm

27
Q

Solution spun fibers generally have an irregular cross section.

A

true

28
Q

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

A

true

29
Q

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

A

stage

30
Q

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

A

inverted

31
Q

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

A

true

32
Q

polymer in a fiber may be partially oriented

A

true

33
Q

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

A

false

34
Q

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

A

polymer

35
Q

temp at which portions of polymer chains not crystallied become mobile

A

glass transition temp

36
Q

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

A

melting point

37
Q

temp at which a polymer begins to degrade into components

A

decomposition temp

38
Q

fibers that have been properly drawn are

A

anisotropic, more crystalline stronger

39
Q

isotropic materials exhibit birefringence

A

false

40
Q

drawing increase the

A

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

41
Q

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

A

manufacturing process

42
Q

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

A

longitudinal mount with polarized light

43
Q

protein fibers

A

composed of polymers of amino acids

44
Q

cellulosic fibers

A

formed from glucose

45
Q

mineral fibers

A

composed of silica obtained from rocks or sand

46
Q

synthetic fibers

A

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

47
Q

linear density equation (denier)

A

9000*fiber length

48
Q

linear density equation (tex)

A

1000*fiber length

49
Q

flax

A

natural cellulose

50
Q

mohair

A

natural protein

51
Q

rayon

A

manufactured cellulose

52
Q

nylon

A

manufactured synthetic

53
Q

polyester

A

manufactured synthetic

54
Q

acyrlic

A

manufactured synthetic

55
Q

metallic

A

manfucatured inorganic

56
Q

crystalline region

A

parallel to each other

57
Q

amorphous region

A

randomly oriented

58
Q

anisotropic

A

not having the same physical properties

TMS 211 (4 decks)

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