test 2

For the yarn specification 20 cc Z 18tpi (cotton) tpi represents

A and B are correct (yarn twist and twists per inch)

When using the AATCC gray scale for staining to determine the rating of the removal of an oily stain

A rating of 1 indicates severe staining, and a rating of 5 indicates no staining

Abrasion resistance is evaluated according to an

ASTM specification

the agreement between true value of the property being tested and the average of many observations according to the test method is

Accuracy

When determining fabric durability, it is important to consider

All but B - all but cost structure, weight, finishes

Fabric testing is used to

All of the above

Mandatory testing procedures for flammability include

All of the above

Testing is performed so that

All of the above

Thickness of textile materials is important in terms of

All of the above

worth street textile rules:

All of the above Standard practices for marketing textile materials Defines basic terms for trade Standard practices for fabric parameters

When evaluating your fabric for abrasion resistance you need to be cognizant of

All of the above breakage/rupture, ____, _____

Tearing strength results can be recorded in which of the following formats?

Both A and B (single peak / highest of 5)

Which of the following is not an evaluation method for abrasion resistance testing

Carry through

Which of the following is not a type of abrasion?

Circular

Tensile test machines include all of the following except

Constant- rate- of elongation

The type of heat transfer that occurs when hot molecules mix with cool molecules is ____

Convection

the value of testing has increased due to all of the following EXCEPT?

Decreases in trade

Matching: Denier

Direct

Matching: Tex

Direct

The process of testing materials until they fail is only used in which two areas of material testing?

Durability and safety

Matching: Breaking elongations

Elongation

(1. test 2) Materials testing assess multiple performance dimensions. (T/F)

False

NFPA creates government procedures for textiles used in aircrafts (t/f?)

False

Solubility for fiber content is best for natural fibers (t/f?)

False

having separate organizations complete a company's testing refers to in-house testing. (T/F?)

False

product failure equals the consumer satisfaction (T/F?)

False

samples are small pieces of material cut or removed from larger piece of fabric (t/f?)

False

scope, safety, scientific principle, apparatus, calculators, and reports are all part of specs. (t/f?)

False

sensitivity is the highest measurement an instrument can make (T/F?)

False

trapezoid, tongue, and falling pendulum are all types of bursting strength testers (T/F?)

False

There are three types of abrasion. Which is considered the most common type

Flex abrasion

The measure of material stillness calculated using bending strength and fabric weight is

Flexural rigidity

Which tensile strength method is the most realistic for assessing consumer performance?

Grab test

in the direct yarn number system the number ____ as yarn size increases; in the indirect yarn number system the number _______.

Increases, decreases

If your company decides to have a separate organization complete laboratory testing this is referred to as,

Independent testing

Matching: Cotton

Indirect

When a material exhibits high stretch and good recovery under a small force or low load this is known as

Low-power stretch

In a stress strain curve, the breaking point is the point at which the

Material ruptures

When assessing pilling resistance, a rating of "5" on the photographic pilling standards indicates _____ pilling, a rating of "1" indicates ____ pilling.

No pilling, very severe pilling

quantitative analysis of fiber content identification may be conducted by all of the following except

Physical

What durability test determines the extent to which fiber ends or other fiber derbris breaks away from the surface and entangle with fibers still attached to the material

Pilling resistance

Matching: Fabric

Planar structure

Matching: Yield point

Point on stress curve

the degree of agreement within a set of observations or test results is the definition of

Precision

A smooth surfaced material receives a rating of 90 on the impact spray water repellency test. Based on this test result, you can determine that the fabric hand

Slight wetting on the surface

_______ testing occurs when a company that supplies a material or a product tests it to make sure it meets the requirements of the buyer

Supplier testing

A definitive procedure for identification, measurement, and evaluation of one or more characteristic or properties of a material that produces a test result is

Test Method

The amount of heat transfer insulation provided by a material exposed to an open flame is _____

Thermal protection

When a towel absorbs water, the

Towel is the absorbent and the water is the absorbate

4point inspection process is the most commonly used inspection process. (T/F?)

True

Bow and skew should be less then 1%. (T/F?)

True

Comparative testing involves testing two or more products from different competitors. (t/f?)

True

Fiber identification analysis includes both qualitative and quantitative (T/F?)

True

Textiles fiber production act labels must include generic fiber type. (t/f?)

True

dimensions of fabric specimen's depend on test methods (t/f?)

True

in general, lab testing is quick (t/f?)

True

lab testing requires trained technicians, special equipment, ad controlled environment. (T/F?)

True

most products are subjected to varying amounts of every type of abrasion (T/F?)

True

testing is analysis and evaluation of a material or product to assess performance and quality. (T/F?)

True

with standard specification calibration fabrics, operators know results of the material. (t/f?)

True

A material that is resistant to water penetration regardless of pressure or force is considered

Waterproof

Matching: Water resistance

ability to withstand penetration by water

Standard test method should be

all of the above

in laboratory testing of the fashion fabric

all of the above 1) small specimens are used 2) specimens are subject to --- 3) they are cut and prepared

Pass/ fail scales are

all of the above specs developed to meet consumer needs laws

which is not a following characteristic of laboratory testing

appropriate for forensic testing from trials

what is a reason to test textile products

both A and C are correct; - make sure material, process and products meet specs - performance and quality

fabric listed as 80 x 64 has

both b and c 80 yarns per inch in warp 64 yarns per inch in fill

if only one value listed as a minimum in a performance spec it applies to

both warp and fill

Matching: Bursting strength

capacity of material to resists force

Matching: Frosting

change in fabric color, localized

Matching: Skew

crosswise yarn forms angle other then 90 degrees

Matching: Bow

crosswise yarns forms one or more arcs

Matching: Significant figures

digits of number that represent actual measurements

Matching: Verification

done periodically with instrument in location of use

_______ is the behavioral characteristic that describes how a material fails or hangs over the three dimensional human form

drape

wear testing includes all of the following EXCEPT:

established, well-known precision

Matching: Breaking Strength

farce needed to rupture

Matching: Patent defect

flaws and irregularities perceived during inspection

Matching: threshold level

greatest irregularity accepted

Matching: Latent defect

hidden problems not apparent during visual inspection

Matching: Waterproof

material resistance penetration not matter what force

Matching: Control

materials that have known history and performance established

the condition reached by a specimen when it no longer takes up moisture from or gives up moisture to the surrounding atmosphere for _____

moisture equilibrium

the mean rating of an absorbency test was 45 seconds. From this finding, you can determine that the fabric is

not very absorbent

Matching: Grade

number value assigned to fabric based on a number, size, and defects

Specimens used in durability testing are

only A and C are correct conditioned by testing restrictive

Matching: Calibration

process of fixing, checking, or correcting

Matching: Garantee

product pledge or assurance of accuracy

Matching: Youngs modle

ratio of change In stress to change in strain

there are some limitations with material testing: which listed below is NOT a limitation

requires a participant questionnaire at the end of the test

which of the following is NOT a characteristic of laboratory testing

requires extended periods of times

Matching: Water repellency

resistance of material to surface wetting

Matching: Friction

resistance to relative motion between two fabrics

Matching: Tearing strength

resistance to start a tear

Matching: Prototype testing

sample products by small groups

Matching: Yarn number

size of yarn

Matching: Water vapor transmission

speed with which water vapor passes through materials

Matching: barre

unintentional repetitive visual pattern stripes

standard business practices for marketing textile materials that define trade terms and fabric parameters are:

worth street textile market rules