Textile objective type Question with answer

Caustic soda mercerization of cotton is carried out for improvement a of

a. Strength and luster b. Whiteness

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Scouring of cotton is carried out under

a. Alkaline conditions b. Acidic conditions c. Neutral conditions

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Acid dyes on nylon are held by

a. Electrostatic attraction b. hydrogen bonding

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Dyes suitable for sublimation transfer printing are

a. acid dyes

b. disperse dyes c. direct dyes

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Chemical suitable for discharge printing is

a. Zirconium sodium sulphoxylate formaldehyde b. Hydorgenperoxide

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a. Zirconium sodium sulphoxylate formaldehyde

The processes for sanforization is used for

a. Improvement in strength b. Dimensional stability

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Decatising process is used for finishing of

a. Cotton

b. polyester c.Wool

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Limiting oxygen index is determined to test the efficiency of

a. Wash and wear finishing b. Water proofing

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Jet-dyeing machine is commonly used for dyeing of

a. Wool b. Cotton c. Polyester

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Descending order of density

a. Cotton

b. Polyprolyene c. Nylon

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Cotton - 1.54–1.56 g/cm³.

Polyester - 1.45 g/cc. Nylon - 1.15 g/cm3 Polyprolyene - 0.855 g/cm3

Range of Maturity Ratio (M) of cotton is :

i. 0 to 1

ii. 0 to 100 iii. 0.2 to 1.2 iv. 0.5 to 1.5

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When twist is increased in a spun yarn, its strength

i. increases ii. decreases

iii. does not change

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The RKm of a yarn is equal to

i. g/tex ii. g/den

iii. Breaking length in Km iv. CSP

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Sectional warping is considered more practical than beam warping

i. For executing big orders

ii. For producing striped fabrics

iii. When sizing is considered necessary iv. When two fold yarn has to be used in

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Sizing gives to the yarn

i. Higher breaking strength

ii. Increased elongation at break iii. Increased pliability

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In a automatic loom

i. Weft-break is repaired automatically ii. Warp-break is repaired automatically iii. Exhausted weft bobbin is replaced

automatically

iv. Exhausted warp beam is replaced automatically

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iii. Exhausted weft bobbin is replaced automatically

During sizing, pick up will increase if

i. Sizing speed increases

ii. Squeezing pressure increase iii. Position of immersion roller is

lowered

iv. Temperature of drying cylinder decreases

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iii. Position of immersion roller is lowered

Fabric cover on a loom is improved by

i. Raising the back rest ii. Having early shedding iii. Having late picking iv. None of the above

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Drawing

i. Increases crystallinity ii. Increases birefringence iii. Decreases crystalline iv. Increase strength

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Gas-singeing machine is operated at a speed of i. 50 – 70 m/min ii.125 – 200 m/min iii.10-40 m/imn iv.80 – 120 m/min

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The desizing process mainly removes

i. Wax and tallow ii. Dirt and colour iii .Starch

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Batch-wise scouring can be carried out in

i. Winch ii. Jigger iii. Kier iv. J-Box

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The most important ingredient of a scouring composition is

i. Wetting agent ii. Alkali

iii. Emulsifying agent iv. Sodium silicate

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Wool and silk can be bleached with

i. Sodium hydrosulphite ii. Sodium perborate

iii. Hydrogen peroxide iv. Sodium hypochlorite

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Mercerization is carried out with NaOH of

i.10 – 15% Conc. ii.18 – 25% Conc. iii.5 – 10% Conc. iv.25-35% Conc.

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An optical brightener is

i. A synthetic bluing agent ii. A colorless dye

iii. A fluorescent compound iv. An optical whitener

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Uster classimat in for classifying

a.Yarn faults

b.Yarn imperfections c.Yarn irregularity

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Singeing of cotton is carried out to

a. Remove protruding fibres from fabrics surface

b. Impart luster

c. Cut long threads from fabric surface

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a. Remove protruding fibres from fabrics surface

Hydrogen peroxide bleaching is carried out of

a. room temperature b.50-60°C

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Mercerization of cotton is carried by using

a. Sodium hydroxide b. Sulphuric acid

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Dyeing of polyester is carried out by using

a. Acid dyes b. direct dyes

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Vinyl sulphone Reactive dyes are applied on cotton under a. alkaline pH b. neutral pH c. acid pH

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Acid Dyes are held on Nylon by means of

a. Electrostatic force b. Covalent bond

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The most productive method for textile printing is

a. Rotary screen-printing

b. Automatic Flat-bed screen-printing c. Block printing

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Fixation of Disperse Dyes on Polyester is carried out of

a. atmospheric steaming b. pressure steaming

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The more common agents used for discharge printing are

a. oxidizing type

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Artificial silk is

(a) Rayon

(b) Polyester (c) Acrylic

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Polyester is referred as

(a) Dupont

(b) Work horse

(c) Cellulose acetate (d) Acrylic

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Spun yarns are

(a)Smooth (b)Lustrous (c) Dull

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Filamentous yarns are

(a)Smooth (B) Dull

(c) Soft (d) Short

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Smooth

Textured yarns are

(a)Straight (b)warm

(c) continuous (d)spun

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Novelty yarns are usually

(a)Boucle yarn (b)Textured yarn (c) Ply yarn

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Spinning of yarn means

(a)Denier (b) Twisting (c) Tex

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The fabric come out from the loom is known as

a. Grey goods b Gray goods

c Mercerized good d none of the above

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Which type of weave produces lustrous surface? a. Twill b. Satin c. Jacquard d. Pile weave

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Yarn count of silk is expressed in

a. Counts b. Denier c. Skein

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Repeat size is a sum of

a)Warp floats b)Weft floats

c)Both warp & weft floats d)None of the above

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The basic elements of woven design are

a)Design & draft. b)Draft &peg plan.

c)Peg plan & denting plan. d)Design, draft, peg plan

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In straight draft : --- = ---

Design = draft. Draft = peg plan.

Peg plan = Denting plan. None of the above

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The plain Weave is variously known as ________ a) Crepe b) Grecians c) Cretonne d) Calico

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Texture is related to ____

(a) Count of yarn

(b) Relative density of threads (c) Both (a) & (b)

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