TT 105 Test #2
Wet-laid fabrics are often used in surgical gowns.
True
A tufted fabric with cut loops is composed of a backing layer, parallel rows of cut tufts and an adhesive applied to the backing layer to lock the tufted yarns in place.
True
A velvet-like fabric composed of short fibers standing vertically and glued to a bas fabric or foam is called a flocked fabric.
True
1000 m of yarn weighs 28.3 g. The linear density of the yarn is 254.7 denier.
True
A V-bed machine is different from a machine with a cylinder and dial.
True
A fabric woven on a Jacquard loom is more expensive than a fabric woven on a dobby loom.
True
A horizontal row of stitches in a knitted fabric is called a "course".
True
A new research technique used to spin nanofibers is called electrospinning.
True
A package of 100 denier yarn weighs 10 lb (4.54 kg). The length of the yarn in the package is therefore 408.6 km long.
True
A random fiber arrangement in a web can be achieved by either a wet-laid or air turbulence technique.
True
A random fiber distribution will give equal strength in all directions.
True
A rib knit can be knitted on a knitting machine with two beds or rows of needles.
True
A spunbonded fabric is produced by bonding filaments at their cross-over points.
True
A vertical column of stitches in a knitted fabric is called a "wale".
True
A web can be adhesive bonded to increase strength by using a "glue" to bind the fibers together.
True
A web is the same thing as a batt.
True
An "oriented" web has all fibers aligned in one direction.
True
An interlock knitted fabric does not tend to curl up at the edges.
True
AstroturfÒ is made on a Raschel knitting machine.
True
Bengaline and pincord fabrics are examples of unbalanced plain rib weaves.
True
Brocade and tapestry fabrics are woven on Jacquard looms.
True
Carded 100% cotton nonwovens are usually adhesive bonded or hydroentangled in order to give them high strength.
True
Corduroy and velvet fabrics are examples of cut pile weaves.
True
Crepe fabrics have a pebbly texture and are often used in table linens.
True
Dobby fabrics have a smaller motif or design than Jacquard fabrics.
True
Felting is the process in which the scales on wool fibers are entangled by applying moisture, heat, chemicals, friction and pressure.
True
Felting, needling, thermal, adhesive and stitch bonding and hydro-entanglement are techniques used to bond nonwoven webs so as to make them stronger.
True
For better thermal insulation, choose a knitted fabric rather than a woven one.
True
Gingham, plaid, chiffon, batiste, and burlap fabrics are examples of plain balanced weaves.
True
Herringbone and houndstooth fabrics are examples of broken twill weaves.
True
However, if a web is needle punched too much, web strength will decrease.
True
If the fabric count of a percale sheeting fabric is given as 250, this means that epi + PPI = 250.
True
In a dry laid web produced using air turbulence, fibers are laid in random directions.
True
In a wet-laid fabric, the fibers are arranged randomly in all directions.
True
In warp knitting, yarns are fed to the needles from a beam which contains many yarns.
True
In weft knitting, yarns are fed to the needles from individual packages of yarn.
True
Jacquard doubleknits incorporate a colored design or motif by using different colored yarns which either knit on the face or float between the two layers.
True
Jacquard looms are more expensive than dobby looms.
True
Jacquard looms run slower than plain looms.
True
Lace is usually made on a Raschel knitting machine.
True
Leno term-29fabrics are characterized by pairs of warp yarns that repeatedly cross over each other.
True
Leno weaves are used for the production of netting and sheer drapes.
True
Longer floats in a satin fabric increase fabric luster.
True
More epi increases the fabric cover and makes the fabric more opaque.
True
More ppi increases the fabric cover and makes the fabric more opaque.
True
Needle punched webs can be needled from one or both sides.
True
Needlepunch bonding machines use barbed needles to entangle the fibers in the web.
True
Non-woven fabrics are designed for function not aesthetics.
True
Non-woven fabrics are made at very high production speeds.
True
Nonwovens are often used in diapers, disposable hospital gowns, wound dressings, Bandaids® and interlinings.
True
Nonwovens tend to be highly engineered, but inexpensive.
True
One of the advantages of weft knits is that they can be shaped into fully fashioned products such as socks, hosiery, bodysuits, and shaped pattern pieces for sweaters.
True
One of the disadvantages of weft knitted fabrics is that they can ravel easily.
True
Quilted fabrics consist of a filler material sandwiched between two thin fabrics.
True
Right hand (Z), left hand (S), warp, weft, and balanced faced twills are different types of twill weaves.
True
Sateen weaves have floats in the weft direction.
True
Sateens are woven from staple spun yarns.
True
Satin fabrics are woven from multifilament yarns.
True
Single jersey fabrics are produced on a knitting machine with one set of needles.
True
Single jersey knitted fabrics have a tendency to curl up at the edges.
True
Weft yarns in a woven fabric are called picks.
True
Soft-sided luggage is often made from a woven fabric that has been coated with a polymer such as latex rubber, polyvinylchloride (PVC) or polyurethane resin.
True
Spandex is more expensive, cleaner, and more predictable than rubber; it also has a longer product life.
True
Spunbonded fabrics are made with thermoplastic filament yarns.
True
Spunbonded nonwovens are made by allowing continuous molten filaments to fuse at the contact points as they cool on a moving belt.
True
Spunlaced fabrics are produced by entangling fibers by means of high pressure water jets.
True
The direction of knitting of a weft knitted fabrics is across the width, and of a warp knitted fabric is along the length.
True
The fibers in a meltblown nonwoven tend to be very fine.
True
The plain weave is the most common and least expensive weave.
True
The projectile on a loom carries a single pick through the shed in a single motion.
True
The shuttle on a loom carries filling yarn through the sheds in many repeat reciprocating motions.
True
The strength of a nonwoven web can be increased by increasing the density of needle punching.
True
The technical face of a woven fabric is the side that is usually seen during use.
True
Thermal bonding of a web requires that a thermoplastic fiber such as nylon, polypropylene or polyester be used.
True
Tricot knitting is a type of warp knitting.
True
Twill fabrics do not have as much design potential as dobby woven fabrics.
True
TyvekÒ is made by the spunbonding process.
True
Usually there are more epi than ppi.
True
Warp faced twills (e.g. denim) have good abrasion resistance.
True
Warp knits stretch less and are more dimensionally stable than weft knits.
True
Warp knitted fabrics do not have the same appearance face and back.
True
Warp yarns in a woven fabric are called ends.
True
Webs can be entangled to make them stronger either by needling or by hydro-entangling.
True
Weft knitted fabrics can be made either in a circular tube or on a V-bed machine.
True
When a web is cross-laid, there is strength in 2 directions rather than in only one direction.
True
When fibers in a web are laid parallel to one another, there is strength in only one direction.
True
When two fabrics are joined together by an adhesive glue, film or foam, the combined fabric has been laminated.
True
Woven fabrics give better waterproof and airtight properties than a knitted fabric.
True
Yarns are used to produce fabrics; whereas threads (sewing threads) are used to join fabric parts together.
True
Fabric count is expressed as epi x PPI (but the numbers are never multiplied).
Tue