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