Txmi 3500 Exam 3

Front 1

What is the difference between regular yarn and sewing thread?

Back 1

1) Yarns: Fiber assemblies intended for weaving, knitting, or otherwise combining into a textile fabric
2) Sewing threads: used for sewing together sections of garments or other products.

Front 2

Characteristics of sewing threads:

Back 2

1) High stability to bending
2) Good strength
3) Limited elongation
4) Minimal shrinkage
5) Good abrasion resistance

Front 3

What will be the effect of increasing twist on the following yarn characteristics?

Back 3

1) Yarn size: increasing twist decreases apparent yarn size.
2) Yarn strength: strength increases in staple yarns as twist increases up to a certain point.
3) Yarn abrasion: abrasion resistance is increased by tighter twist.

Front 4

Tex

Back 4

Weight in grams of a 1-kilometer (1,000-meter) length of yarn.

Front 5

Denier

Back 5

Weight in grams of 9,000 meters of yarn.

Front 6

Linen count/linen lea

Back 6

Number of hanks of 300 yards in 1 pound.

Front 7

Cotton count

Back 7

Number of hanks of 840 yards in 1 pound.

Front 8

Which of the following pairs of yarns is finer?

Back 8

1) 10s wool vs. 5s wool: 10s wool
2) 400 denier polyester vs. 300 denier polyester: 300 denier
3) 20s cotton vs. 10s cotton: 20s cotton
4) 20s linen vs. 20s cotton: 20s cotton

Front 9

Stretch-texturing methods:

Back 9

1) False-twist
2) Stuffer-box
3) Gear-crimping
4) Edge-crimping

Front 10

Bulk-texturing methods:

Back 10

1) Air-jet
2) Hot-fluid jet

Front 11

Textured yarn:

Back 11

A filament yarn in which the smooth, straight form of the fibers has been altered for stretch or bulk.

Front 12

Carding

Back 12

The process step in making spun yarns in which fibers are passed through intermeshing wires that separate and pull them into somewhat parallel form.

Front 13

Combing

Back 13

A process step following carding in making spun yarns in which the fibers are pulled through a comblike device into a more parallel alignment.

Front 14

______ yarns have smooth surfaces & finer diameters than do _______ yarns. Because the shorter fibers have been removed, fewer short ends show on the surface of the fabric, and the lust is increased.

Back 14

Combed, carded

Front 15

Two types of yarn made from wool fiber?

Back 15

1) Woolen yarns
2) Worsted yarns

Front 16

Woolen yarns:

Back 16

1) Soft & bulky
2) Many fiber ends
3) Fuzzy appearance & hand
4) Weak
5) Poor abrasion resistance

Front 17

Worsted yarns:

Back 17

1) Smooth, sleek, and compact
2) Fewer fiber ends on the surface
3) Better strength
4) Crisper hand

Front 18

Why are ply yarns more likely to be found in better high-priced garments than in moderate to lower cost items?

Back 18

Ply yarns are much more expensive than single yarns.

Front 19

Purposes of blending:

Back 19

1) Thorough intermixing of fibers
2) Combining fibers w/ different properties to produce yarns w/ characteristics that cannot be obtained by using one type of fiber alone.

Front 20

Shed

Back 20

The passageway between the warp yarns through which the shuttle is thrown in weaving.

Front 21

Steps in weaving:

Back 21

1) Winding yarns on the warp beam
2) Drawing-in
3) Winding yarns on the quill
4) Shedding
5) Picking
6) Beating up
7) Taking up/letting off

Front 22

Fabric count/thread count

Back 22

Number of yarns in one inch or centimeter of warp and in one inch or centimeter of filling.

Front 23

What would be the fabric count if the fabric has 75 yarns per inch in the warp and 65 yarns per inch in the filling?

Back 23

75 x 65

Front 24

Balanced weave

Back 24

When the number of yarns in the warp is similar to the number of yarns in the filling.

Front 25

Unbalanced weave

Back 25

Weaves with more yarns in the warp than in the filling.

Front 26

__________ fabrics usually exhibit so-called rib effects created when number finer warp yarns cross over coarser filling yarns.

Back 26

Unbalanced

Front 27

Costs increase more rapidly as the number of picks (filling yarns) per inch increases; therefore, fabrics w/ ________ weaves or those w/ more yarns in the filling than in the warp are more costly to manufacture.

Back 27

balanced

Front 28

When warp and filling yarns intersect at right angles, the fabric is said to be . . .

Back 28

true on grain or grain perfect.

Front 29

When the yarns do not lie in the proper position, the fabric is said to be . . .

Back 29

off-grain.

Front 30

T/F: The extent to which a fabric is on true grain is an indicator of fabric quality.

Back 30

TRUE

Front 31

Effect of being off-grain?

Back 31

1) Plaids and stripes do not match
2) Does not drape properly
3) Pant legs twist

Front 32

Warp/end

Back 32

The yarn running lengthwise in a woven fabric.

Front 33

Filling/pick

Back 33

Yarn running from selvage to selvage at right angles to the warp in a woven fabric.

Front 34

In a weave diagram, what does a darkened square represent? A light square?

Back 34

1) Darkened square = warp
2) Light square = filling

Front 35

What is the importance of selvage in a fabric?

Back 35

Prevent loose yarn ends from fraying or raveling.

Front 36

Plain weave:

Back 36

Yarns at right angles pass over and under each other.

Front 37

Characteristics of plain weave:

Back 37

1) Wears well
2) Ravels less
3) Wrinkles more
4) Less absorbent
5) Easy care

Front 38

Twill weave:

Back 38

Each warp or filling yarn floats across two or more filling or warp yarns.

Front 39

Characteristics of twill weave:

Back 39

1) Drapes well
2) Shows less soil but harder to clean
3) Strong
4) Good abrasion resistance
5) Softer
6) Wrinkles less
7) Sheds soil readily
8) Wind resistant

Front 40

Satin weave:

Back 40

Each warp yarn floats over 4 filling yarns and interlaces with a fifth filling yarn.

Front 41

Characteristics of satin weave:

Back 41

1) Snags and abrades easily
2) High thread count
3) Low air permeability
4) Resists wrinkling
5) Yarn slippage
6) High luster
7) Smooth & slippery
8) Sheds dirty easily

Front 42

What is the difference between satin fabric and sateen fabric?

Back 42

1) Satin: warp floats, filament yarns, manufactured fibers, long floats
2) Sateen: filling floats, staple yarns, cotton, short floats

Front 43

Three reasons why fabrics w/ the same weave can still have different appearances:

Back 43

1) Drape
2) Shrinkage
3) Surface properties

Front 44

The fabric stretches more in the ____ direction than in the warp or filling direction.

Back 44

Bias

Front 45

How can a jacquard loom create intricate patterns in a woven fabric?

Back 45

It controls each warp yarn separately by threading it through a loop in the end of a leash or cord.

Front 46

Texturing

Back 46

Modifying the feel and bulk of filament yarns.

Front 47

Simple yarns

Back 47

Yarns w/ uniform size and regular surface.

Front 48

Cord yarns

Back 48

Two or more ply yarns.

Front 49

Filament yarns

Back 49

Long, continuous strands of fiber.

Front 50

Monofilament yarns

Back 50

Yarns made from a single filament.

Front 51

Multifilament yarns

Back 51

Yarns with many filaments.

Front 52

Stape/spun yarns

Back 52

Yarns made from staple-length fibers.

Front 53

Single yarn

Back 53

Staple fibers twisted together.

Front 54

Ply yarns

Back 54

Two or more single yarns.

Front 55

Novelty yarns

Back 55

Yarns made to create interesting decorative effects in the fabric.

Front 56

Complex yarns

Back 56

Yarns with more than one part.