TEXTILE ENGINEERING AND FIBRE SCIENCE- PAGE 2
TEXTILE ENGINEERING AND FIBRE SCIENCE MCQs-PAGE 2
1:-Which one of these clothings is best suited in fire prone areas?
A:-Wool B:-Cotton C:-Silk D:-Linen
Ans: A
2:-Which of the following is the right concentration of sodium hydroxide (WN) in cold mercerizing?
A:-3-7%
B:-7—9%
C:-18-22%
D:-30-34%
Ans: C
3:-The substance removed during degumming
A:-Sericin B:-Fibroin C:-Naturalcolouring matters D:-Woolwax
Ans: A
4:-Which of the following dyes is readily soluble in water?
A:-Naphtholdyes B:-Reactive dyes C:-Disperse dyes D:-Sulphur dyes
Ans: B
5:-Term scrooping is associated with
A:-Shearing of wool B:-Dyeing with sulphur dyes C:-Treating wool with sulphuric acid D:-Treating silk with acetic acid
Ans: D
6:-lndigo is a natural dye of
A:-Vegetableorigin B:-Animalorigin C:-Mineralorigin D:-None of the above
Ans: A
7:-Cellulose Xanthate is prepared using
A:-Carbon di sulphide B:-Sulphur dioxide C:-Hydrogen sulphide D:-Sodium sulphoxylate formaldehyde
Ans: A
8:-The function of alkali in the dyeing of procion dyes
A:-Promote level dyeing B:-Dispersion of dye C:-Promote exhaustion of dye D:-Reacting dye with fiber
Ans: D
9:-A yarn characterised by the presence of imperfections or irregularities which are introduced in it deliberately
A:-Sewing thread B:-Warp yarn C:-Fancy yarn D:-Weft yarn
Ans: C
10:-Which of the following package is associated with hank yarn?
A:-Cop B:-Cone C:-Cheese D:-Bundle
Ans: D
11:-Which of the following machine have prime influence on the removal of short fibers?
A:-Hooper feeder B:-Mixing bale opener C:-Draw frame D:-Card
Ans: D
12:-Which of the following is not an object of ring frame?
A:-Twisting B:-Drafting C:-Opening D:-Winding
Ans: C
13:-Which of the following machines exercise the maximum amount of draft?
A:-Ring frame B:-Card C:-Draw frame D:-Flyframe
Ans: B
14:-Which among the following can be the cause of crackers?
A:-Excessive ballooning B:-Wider roller setting C:-Closer roller setting D:-Insufficient top roller pressure
Ans: C
15:-Shrink resistant wool is prepared by
A:-Carbonisation B:-Vulcanisation C:-Acetylation D:-Chlorination
Ans: D
16:-Which of the following holds good for card web?
A:-Majority of the fibers are having trailing hooks B:-Majority of the fibers are having Leading hooks
C:-Majority of the fibers are having double hooks D:-Majority of the fibers are having no hooks
Ans: A
17:-Number of passages recommended between carding and ring spinning
A:-Odd number B:-Even number C:-Two D:-None of the above
Ans: A
18:-Which one of the following can be the TPI of "'40"s"‘ cotton warp yarn
A:-25 B:-14 C:-60 D:-40
Ans: A
19:-In ring spun yarn
A:-sheath and core are equally twisted B:-The core is more twisted than the sheath
C:-The sheath is more twisted than core D:-None of the above
Ans: C
20:-The speed of traveller is
A:-Equalto the speed of the spindle B:-Always more than the speed of the spindle
C:-Always less than the speed of the spindle D:-Seldom less than the speed of the spindle
Ans: C
21:-The process of supplying necessary moisture to textiles is known as
A:-Weighting B:-Scouring C:-Conditioning D:-Tinting
Ans: C
22:-The ratio of actual vapour pressure to the maximum vapour pressure, expressed as a percentage is called
A:-Absolute humidity B:-Moisture regain C:-Relative humidity D:-Moisture content
Ans: C
23:-Which one of the following is the standard regain of cotton?
A:-8.5 B:-1.5C:-4 D:-13.5
Ans: A
24:-Which of the following is a natural mineral fiber
A:-Asbestos B:-Glass C:-Nylon 6 D:-Aramid
Ans: A
25:-Which of the following is a unicellular fiber?
A:-Silk B:-Jute C:-Ramie D:-Cotton Ans: D
26:-Schweitzer's reagent is a mixture of copper hydroxide and
A:-Acetic acid B:-Ammonia C:-Hydrochloric acid D:-Sodium chloride
Ans: B
27:-Oxy cellulose is formed when cotton is boiled with concentrated
A:-Hydrochloric acid B:-Sodium chloride C:-Nitric acid D:-Sulphuric acid
Ans: C
28:-The process of stretching the fabric width wise to regain its original dimension is called
A:-Tentering B:-Tendering
C:-Stentering D:-None of the above
Ans: C
29:-The protein present in wool is
A:-Elastin B:-Keratin C:-Fibronectin D:-Kevlar
Ans: B
30:-The process done to compensate for the loss occurred due to boiling-off
A:-Mordanting B:-Weighting C:-Fixing D:-Sizing
Ans: B
31:-The property of wool that helps it in carbonizing is
A:-Resistance to alkali B:-Resistance to acids C:-Resistance high temperature D:-Resistance to cold weather
Ans: B
32:-The species that yield mulberry silk is
A:-Philosamia ricinis B:-Bombyx mori C:-Antheraea paphis D:-Antheraea assamia
Ans: B
33:-Which of the following is used in the coagulating bath, for the spinning of viscose rayon?
A:-Sulphuric acid B:-Acetic anhydride C:-Hydrochloric acid D:-Nitric acid
Ans: A
34:-Monomer used in the preparation of nylon 6
A:-Adipic acid B:-Caprolactum C:-Hexamethylene diamine D:-Terephthalic acid
Ans: B
35:-The chemical used in the souring of cotton
A:-Washing soda B:-Caustic potash C:-Caustic soda D:-Sulphuric acid
Ans: D
36:-Turkey red oil is
A:-Surface active substance B:-Sequestering agent C:-Bleaching agent D:-Anti mildew agent
Ans: A
37:-Singeing removes
A:-Protein fibers B:-Vegetablematter C:-Protruding fibers D:-Entangled yarns
Ans: C
38:-Bleaching agent used in continuous bleaching process
A:-Sodium hypochlorite B:-Sodium chlorite C:-Ca|cium hypochlorite D:-Hydrogen peroxide
Ans: D
39:-The term stoving is associated with
A:-Desizing B:-Burning away of protruding fibers C:-Burning of vegetable impurities D:-Bleaching with sulphur dioxide
Ans: D
40:-Which one of the following statements is wrong?
A:-The density is same for both cotton and viscose
B:-The degree of polymerization is same for both cotton and viscose
C:-Both cotton and viscose are hydrophilic fibres
D:-Both cotton and viscose are the cellulosic fibres
Ans: B
41:-Which one of the following statements is correct with respect to a textile fibre?
A:-It is transversely isotropic B:-The primary bond strength is weaker than secondary bond.
C:-Essentially it is made of short chain molecules. D:-It is having very high density.
Ans: A
42:-The ho||ow space in cotton is known as:
A:-Lumen B:-Stomas C:-Medu||a D:-Pores
Ans: A
43:-With an increase of moisture content, the strength of a Nylon filament
A:-Increases
B:-Decreases
C:-First increases then decreases
D:-First decreases then increases
Ans: B
44:-Which of the following fibers has excellent elastic recovery?
A:-Cotton B:-Polyester C:-Nylon D:-Viscose
Ans: C
45:-Which of the following fibres has excellent crease resistant?
A:-Cotton B:-Po|yster C:-Nylon D:-Viscose
Ans: B
46:-Birefringence of a fibre is the measure of
A:-Dynamic modulus B:-Density C:-Orientation D:-Crystallinity
Ans: C
47:-The presence of functional groups in a fibre can be best determined by
A:-IR spectroscopy B:-NMR spectroscopy
C:-Differential scanning calorimeter D:-X-ray spectroscopy
Ans: A
48:-Analysis of fiber structure by means of diffraction of electromagnetic waves is more compatible with x-rays than with ordinary visible light because
A:-X-rays has higher energy than ordinary light
B:-X-rays has wave lengths smaller than ordinary light
C:-|t is easy to get picture or photographs with x-rays
D:-Wave lengths are comparable with crystallite sizes of fibre
Ans: D
49:-E|ectromagnetic waves used in NMR spectroscopy is
A:-Ultra-violet rays B:-Radio waves
C:-Gamma rays D:-Infra-red rays
Ans: B
50:-The helix reversal is found in
A:-Jute B:-Wool C:-Silk D:-Cotton
Ans: D
A:-Wool B:-Cotton C:-Silk D:-Linen
Ans: A
2:-Which of the following is the right concentration of sodium hydroxide (WN) in cold mercerizing?
A:-3-7%
B:-7—9%
C:-18-22%
D:-30-34%
Ans: C
3:-The substance removed during degumming
A:-Sericin B:-Fibroin C:-Naturalcolouring matters D:-Woolwax
Ans: A
4:-Which of the following dyes is readily soluble in water?
A:-Naphtholdyes B:-Reactive dyes C:-Disperse dyes D:-Sulphur dyes
Ans: B
5:-Term scrooping is associated with
A:-Shearing of wool B:-Dyeing with sulphur dyes C:-Treating wool with sulphuric acid D:-Treating silk with acetic acid
Ans: D
6:-lndigo is a natural dye of
A:-Vegetableorigin B:-Animalorigin C:-Mineralorigin D:-None of the above
Ans: A
7:-Cellulose Xanthate is prepared using
A:-Carbon di sulphide B:-Sulphur dioxide C:-Hydrogen sulphide D:-Sodium sulphoxylate formaldehyde
Ans: A
8:-The function of alkali in the dyeing of procion dyes
A:-Promote level dyeing B:-Dispersion of dye C:-Promote exhaustion of dye D:-Reacting dye with fiber
Ans: D
9:-A yarn characterised by the presence of imperfections or irregularities which are introduced in it deliberately
A:-Sewing thread B:-Warp yarn C:-Fancy yarn D:-Weft yarn
Ans: C
10:-Which of the following package is associated with hank yarn?
A:-Cop B:-Cone C:-Cheese D:-Bundle
Ans: D
11:-Which of the following machine have prime influence on the removal of short fibers?
A:-Hooper feeder B:-Mixing bale opener C:-Draw frame D:-Card
Ans: D
12:-Which of the following is not an object of ring frame?
A:-Twisting B:-Drafting C:-Opening D:-Winding
Ans: C
13:-Which of the following machines exercise the maximum amount of draft?
A:-Ring frame B:-Card C:-Draw frame D:-Flyframe
Ans: B
14:-Which among the following can be the cause of crackers?
A:-Excessive ballooning B:-Wider roller setting C:-Closer roller setting D:-Insufficient top roller pressure
Ans: C
15:-Shrink resistant wool is prepared by
A:-Carbonisation B:-Vulcanisation C:-Acetylation D:-Chlorination
Ans: D
16:-Which of the following holds good for card web?
A:-Majority of the fibers are having trailing hooks B:-Majority of the fibers are having Leading hooks
C:-Majority of the fibers are having double hooks D:-Majority of the fibers are having no hooks
Ans: A
17:-Number of passages recommended between carding and ring spinning
A:-Odd number B:-Even number C:-Two D:-None of the above
Ans: A
18:-Which one of the following can be the TPI of "'40"s"‘ cotton warp yarn
A:-25 B:-14 C:-60 D:-40
Ans: A
19:-In ring spun yarn
A:-sheath and core are equally twisted B:-The core is more twisted than the sheath
C:-The sheath is more twisted than core D:-None of the above
Ans: C
20:-The speed of traveller is
A:-Equalto the speed of the spindle B:-Always more than the speed of the spindle
C:-Always less than the speed of the spindle D:-Seldom less than the speed of the spindle
Ans: C
21:-The process of supplying necessary moisture to textiles is known as
A:-Weighting B:-Scouring C:-Conditioning D:-Tinting
Ans: C
22:-The ratio of actual vapour pressure to the maximum vapour pressure, expressed as a percentage is called
A:-Absolute humidity B:-Moisture regain C:-Relative humidity D:-Moisture content
Ans: C
23:-Which one of the following is the standard regain of cotton?
A:-8.5 B:-1.5C:-4 D:-13.5
Ans: A
24:-Which of the following is a natural mineral fiber
A:-Asbestos B:-Glass C:-Nylon 6 D:-Aramid
Ans: A
25:-Which of the following is a unicellular fiber?
A:-Silk B:-Jute C:-Ramie D:-Cotton Ans: D
26:-Schweitzer's reagent is a mixture of copper hydroxide and
A:-Acetic acid B:-Ammonia C:-Hydrochloric acid D:-Sodium chloride
Ans: B
27:-Oxy cellulose is formed when cotton is boiled with concentrated
A:-Hydrochloric acid B:-Sodium chloride C:-Nitric acid D:-Sulphuric acid
Ans: C
28:-The process of stretching the fabric width wise to regain its original dimension is called
A:-Tentering B:-Tendering
C:-Stentering D:-None of the above
Ans: C
29:-The protein present in wool is
A:-Elastin B:-Keratin C:-Fibronectin D:-Kevlar
Ans: B
30:-The process done to compensate for the loss occurred due to boiling-off
A:-Mordanting B:-Weighting C:-Fixing D:-Sizing
Ans: B
31:-The property of wool that helps it in carbonizing is
A:-Resistance to alkali B:-Resistance to acids C:-Resistance high temperature D:-Resistance to cold weather
Ans: B
32:-The species that yield mulberry silk is
A:-Philosamia ricinis B:-Bombyx mori C:-Antheraea paphis D:-Antheraea assamia
Ans: B
33:-Which of the following is used in the coagulating bath, for the spinning of viscose rayon?
A:-Sulphuric acid B:-Acetic anhydride C:-Hydrochloric acid D:-Nitric acid
Ans: A
34:-Monomer used in the preparation of nylon 6
A:-Adipic acid B:-Caprolactum C:-Hexamethylene diamine D:-Terephthalic acid
Ans: B
35:-The chemical used in the souring of cotton
A:-Washing soda B:-Caustic potash C:-Caustic soda D:-Sulphuric acid
Ans: D
36:-Turkey red oil is
A:-Surface active substance B:-Sequestering agent C:-Bleaching agent D:-Anti mildew agent
Ans: A
37:-Singeing removes
A:-Protein fibers B:-Vegetablematter C:-Protruding fibers D:-Entangled yarns
Ans: C
38:-Bleaching agent used in continuous bleaching process
A:-Sodium hypochlorite B:-Sodium chlorite C:-Ca|cium hypochlorite D:-Hydrogen peroxide
Ans: D
39:-The term stoving is associated with
A:-Desizing B:-Burning away of protruding fibers C:-Burning of vegetable impurities D:-Bleaching with sulphur dioxide
Ans: D
40:-Which one of the following statements is wrong?
A:-The density is same for both cotton and viscose
B:-The degree of polymerization is same for both cotton and viscose
C:-Both cotton and viscose are hydrophilic fibres
D:-Both cotton and viscose are the cellulosic fibres
Ans: B
41:-Which one of the following statements is correct with respect to a textile fibre?
A:-It is transversely isotropic B:-The primary bond strength is weaker than secondary bond.
C:-Essentially it is made of short chain molecules. D:-It is having very high density.
Ans: A
42:-The ho||ow space in cotton is known as:
A:-Lumen B:-Stomas C:-Medu||a D:-Pores
Ans: A
43:-With an increase of moisture content, the strength of a Nylon filament
A:-Increases
B:-Decreases
C:-First increases then decreases
D:-First decreases then increases
Ans: B
44:-Which of the following fibers has excellent elastic recovery?
A:-Cotton B:-Polyester C:-Nylon D:-Viscose
Ans: C
45:-Which of the following fibres has excellent crease resistant?
A:-Cotton B:-Po|yster C:-Nylon D:-Viscose
Ans: B
46:-Birefringence of a fibre is the measure of
A:-Dynamic modulus B:-Density C:-Orientation D:-Crystallinity
Ans: C
47:-The presence of functional groups in a fibre can be best determined by
A:-IR spectroscopy B:-NMR spectroscopy
C:-Differential scanning calorimeter D:-X-ray spectroscopy
Ans: A
48:-Analysis of fiber structure by means of diffraction of electromagnetic waves is more compatible with x-rays than with ordinary visible light because
A:-X-rays has higher energy than ordinary light
B:-X-rays has wave lengths smaller than ordinary light
C:-|t is easy to get picture or photographs with x-rays
D:-Wave lengths are comparable with crystallite sizes of fibre
Ans: D
49:-E|ectromagnetic waves used in NMR spectroscopy is
A:-Ultra-violet rays B:-Radio waves
C:-Gamma rays D:-Infra-red rays
Ans: B
50:-The helix reversal is found in
A:-Jute B:-Wool C:-Silk D:-Cotton
Ans: D
51:-For printing with reactive dye, most suitable thickener is
A:-Sodium chloride B:-Sodium hypochlorite C:-Sodium chlorite D:-Sodium alginate
Ans: D
52:-Mercerization of a cotton fabric is carried out by
A:-Sodium chloride B:-Sodium hypochlorite C:-Sodium hydroxide D:-Sodium chlorite
Ans: C
53:-For a satin weave (warp face)
A:-Picks/cm is greater than ends/cm. B:-Ends/cm is greater than picks/cm.
C:-Ends/cm is equal to picks/cm. D:-Ends/cm is just less than picks/cm.
Ans: B
54:-Which one of the following statements is true?
A:-G|ass is 100% crystalline fibre. B:-Po|ypropylene is 100% amorphous fibre.
C:-Cotton is 50% crystalline fibre. D:-Wool is 30% crystalline fibre.
Ans: D
55:-Water acts as catalyst for the production of
A:-Ny|on 6 B:-Acry|ic C:-Viscose D:-Po|yester
Ans: A
56:-Which of the following fibre properties is not governed by its amorphous content?
A:-Dye uptake B:-Moisture content C:-Extensibi|ity D:-Friction
Ans: D
57:-Which one of the following is the correct order in a DSC heating plot with increasing temperature?
A:-G|ass transition, crystallization, melting
B:-Me|ting, glass transition, crystallization
C:-Crysta||ization, glass transition, melting
D:-G|ass transition, melting, crystallization
Ans: A
58:-Which one of the synthetic filament properties is not controlled by the drawing?
A:-Orientation B:-Crystallinity C:-Birefringence D:-Molecular weight
Ans: D
59:-Which one of the following materials has highest strength/weight ratio?
A:-Steel B:-Nylon C:-Kevlar D:-Polyester
Ans: C
60:-Zieg|er-Natta catalyst is essential for the production of
A:-Kevlar B:-Polypropylene C:-Acry|ic D:-Cellulose triacetate
Ans: B
61:-If d is the fibre diameter, air-flow rate through a plug of fibres is proportional to
A:-‘sqrt(d)‘ B:-d C:-‘d"(2)‘ D:- ‘d"(3)‘
Ans: C
62:-For a square cut polyester staple fibre, length uniformity index is
A:-0.5 B:-0.5128 C:-0.5328 D:-1
Ans: D
63:-INSTRON® tensile tester works on‘ INSTRON"(o.)‘
A:-CRL principle B:-CRE principle C:-CRT principle D:-CRS principle
Ans: B
64:-As the time to beak increases
A:-Yarn strength decreases B:-Yarn strength increase
C:-Yarn strength does not change D:-Yarn strength first decreases and then increases
Ans: A
65:-Most suitable test for parachute fabric is
A:-Tensi|e strip strength B:-Bursting strength C:-Tearing strength D:-Tensi|e grab strength
Ans: B
66:-Three verities of cotton fibres of 4.5, 5 and 4.0 micronaire values are blended in weight proportions of 30%, 20% and 50%, respectively. The average micronaire value of mixing is
A:-4.32 B:-4.35 C:-4.40 D:-4.34
Ans: A
67:-lf the front top ro||er of a ring frame having diameter of 1 inch becomes eccentric, at what wave length of spectrogram do you expect a peak?
A:-8 cm B:-2.54 cm C:-4 cm D:-1.27 cm
Ans: A
68:-8 slivers each with a CVm of 2.8% are fed to a draw frame. If the draw frame adds a CVm of 1%, what will be the CVm of ouput sliver? A:-3.8% B:-1.1% C:-1.41% D:-1.8%
Ans: C
69:-Low strength mechanical properties are strongly correlated with
A:-Fabric thermal comfort B:-Fabric drape C:-Fabric dimensional stability D:-Fabric handle
Ans: D
70:-Which one of the following parameters has no influence on air permeability?
A:-Fabric cover factor B:-Yarn twist density C:-Fabric stiffness D:-Fabric porosity
Ans: C
71:-What is the GSM (g/mz) of a square jammed plain cloth made from 20 tex cotton yarns of 0.17 mm diameter?
A:-154 B:-164 C:-264 D:-364
Ans: B
72:-Which one of the following statements is false?
A:-Equa||y strong but more extensible yarn will lead to higher grab strength.
B:-The grab strength of a fabric is higher than its strip strength.
C:-Tear resistance of a fabric is only a fraction of its tensile resistance.
D:-The grab strength of a fabric reduces as the fabric width increases.
Ans: D
73:-Sublimation transfer printing is most suitable for
A:-Cotton B:-Polyster
C:-Silk D:-Acrylic
Ans: B
74:-Thermal resistance values of fabrics in an assembly are
A:-Mu|tip|icative B:-Substractive C:-Additive D:-Average
Ans: C
75:-Shear stress vs. shear strain curve of a fabric shows
A:-Linearity with hysteresis B:-Non|inearity with hysteresis
C:-Linearity without hysteresis D:-Non|inearity with hysteresis
Ans: B
76:-Self-twist spinning is most suitable for
A:-Cotton B:-Jute
C:-Flax D:-Wool
Ans: D
77:-For same count, rotor yarn TM is
A:-2 times greater than that of ring yarn. B:-10-15 % greater than ring yarn.
C:-Same as ring yarn. D:-10-15% lower than ring yarn.
Ans: B
78:-In case of Mélange yarn production, with the increase of shade depth
A:-Yarn quality deteriorates B:-Yarn quality remains same
C:-Yarn quality improves D:-Yarn quality firstly improves and then deteriorates
Ans: A
79:-In case of air-vortex spinning
A:-All fibres start from the centre of the yarn and run outside.
B:-All fibres start from the surface of the yarn and run inside.
C:-Core fibres are parallel and the sheath fibres are wrapped over the core fibres
D:-Core fibres have a twist direction which is different from the sheath fibres
Ans: A
80:-In comparison with the ring spun yarn, air-jet spun yarn is
A:-Weaker, stiffer and harder B:-Stronger, softer and smoother
C:-Weaker, bulkier and harsher D:-Stronger, hairier and evener
Ans: A
81:-Feed per nip of comber is around
A:-2 mm B:-6 mm C:-12 mm D:-18 mm
Ans: B
82:-Self-cleaning action in a comber
A:-Increases with batt weight B:-Decreases with batt weight
C:-Does not change with batt weight D:-Decrease with fibre disorientation
Ans: A
83:-Qua|ity of combing is better in
A:-Forward feed B:-Backward feed
C:-Mixed feed D:-Differential feed
Ans: B
84:-Which machine in the spinning line is termed as necessary evil for producing ring spun yarn?
A:-Card B:-Comber C:-Ring frame D:-Speed frame
Ans: D
85:-Pressure bar in draw frame is used to
A:-App|y pressure to the front top ro||er. B:-App|y pressure to the middle top ro||er.
C:-Contro| the long fibre movement. D:-Contro| the short fibre movement.
Ans: D
86:-Yarn tension during winding is proportional to the
A:-‘(Yarn tex)"(2)‘
B:-‘sqrt(Yarn tex)‘
C:-Yarn tex
D:-‘ (1)/(Yarn tex)‘
Ans: C
87:-A 3.5 crossing drum means there are
A:-1.75 turns in a double traverse B:-3.5 turns in a double traverse
C:-7 turns in a double traverse D:-10.5 turns in a double traverse
Ans: C
88:-A loom is weaving the design of 1 up 2 down twi||. If the loom is running at 240 rpm, the speed of tappet shaft will be
A:-60 rpm B:-120 rpm
C:-80 rpm D:-240 rpm
Ans: C
89:-AJacquard design is repeating on 20 cm along length and 12 cm along width. If the fabric has 30 ends and 24 picks per cm, the Jacquard capacity is
A:-240 B:-580
C:-360 D:-480
Ans: C
90:-A loom of 500 cm width is running at 800 picks/min. The weft insertion rate of the loom is
A:-800 m/min B:-4000 m/min
C:-500 m/min D:-5000 m/min
Ans: B
91:-On a Sulzer® projectile loom, the number of projectiles depends on
A:-Projecti|e mass B:-Torsion-bar arrangement
C:-Loom width D:-Projecti|e length
Ans: C
92:-Which one of the following phenomena cannot be described by Poisson distribution
A:-Number of warp breakage on a loom B:-Number of fabric defects / square meter
C:-Number of fibres in the yarn cross-section D:-Strength of the warp yarn
Ans: D
93:-If 1 Km of yarn produces 900 m fabric, the yarn crimp in the fabric is
A:-10%
B:-9%
C:-11.1%
D:-10.9%
Ans: C
94:-Indigo is a
A:-Vat dye
B:-Cationic dye
C:-Acid dye
D:-Disperse dye
Ans: A
95:-Dyeing of acrylic is carried out by using
A:-Vat dye
B:-Cationic dye
C:-Acid dye
D:-Disperse dye
Ans: B
96:-Acid dyes are held on fabric by means of
A:-Covalent bond
B:-Vander wall force
C:-Electrostatic force
D:-Electromagnetic force
Ans: C
A:-Sodium chloride B:-Sodium hypochlorite C:-Sodium chlorite D:-Sodium alginate
Ans: D
52:-Mercerization of a cotton fabric is carried out by
A:-Sodium chloride B:-Sodium hypochlorite C:-Sodium hydroxide D:-Sodium chlorite
Ans: C
53:-For a satin weave (warp face)
A:-Picks/cm is greater than ends/cm. B:-Ends/cm is greater than picks/cm.
C:-Ends/cm is equal to picks/cm. D:-Ends/cm is just less than picks/cm.
Ans: B
54:-Which one of the following statements is true?
A:-G|ass is 100% crystalline fibre. B:-Po|ypropylene is 100% amorphous fibre.
C:-Cotton is 50% crystalline fibre. D:-Wool is 30% crystalline fibre.
Ans: D
55:-Water acts as catalyst for the production of
A:-Ny|on 6 B:-Acry|ic C:-Viscose D:-Po|yester
Ans: A
56:-Which of the following fibre properties is not governed by its amorphous content?
A:-Dye uptake B:-Moisture content C:-Extensibi|ity D:-Friction
Ans: D
57:-Which one of the following is the correct order in a DSC heating plot with increasing temperature?
A:-G|ass transition, crystallization, melting
B:-Me|ting, glass transition, crystallization
C:-Crysta||ization, glass transition, melting
D:-G|ass transition, melting, crystallization
Ans: A
58:-Which one of the synthetic filament properties is not controlled by the drawing?
A:-Orientation B:-Crystallinity C:-Birefringence D:-Molecular weight
Ans: D
59:-Which one of the following materials has highest strength/weight ratio?
A:-Steel B:-Nylon C:-Kevlar D:-Polyester
Ans: C
60:-Zieg|er-Natta catalyst is essential for the production of
A:-Kevlar B:-Polypropylene C:-Acry|ic D:-Cellulose triacetate
Ans: B
61:-If d is the fibre diameter, air-flow rate through a plug of fibres is proportional to
A:-‘sqrt(d)‘ B:-d C:-‘d"(2)‘ D:- ‘d"(3)‘
Ans: C
62:-For a square cut polyester staple fibre, length uniformity index is
A:-0.5 B:-0.5128 C:-0.5328 D:-1
Ans: D
63:-INSTRON® tensile tester works on‘ INSTRON"(o.)‘
A:-CRL principle B:-CRE principle C:-CRT principle D:-CRS principle
Ans: B
64:-As the time to beak increases
A:-Yarn strength decreases B:-Yarn strength increase
C:-Yarn strength does not change D:-Yarn strength first decreases and then increases
Ans: A
65:-Most suitable test for parachute fabric is
A:-Tensi|e strip strength B:-Bursting strength C:-Tearing strength D:-Tensi|e grab strength
Ans: B
66:-Three verities of cotton fibres of 4.5, 5 and 4.0 micronaire values are blended in weight proportions of 30%, 20% and 50%, respectively. The average micronaire value of mixing is
A:-4.32 B:-4.35 C:-4.40 D:-4.34
Ans: A
67:-lf the front top ro||er of a ring frame having diameter of 1 inch becomes eccentric, at what wave length of spectrogram do you expect a peak?
A:-8 cm B:-2.54 cm C:-4 cm D:-1.27 cm
Ans: A
68:-8 slivers each with a CVm of 2.8% are fed to a draw frame. If the draw frame adds a CVm of 1%, what will be the CVm of ouput sliver? A:-3.8% B:-1.1% C:-1.41% D:-1.8%
Ans: C
69:-Low strength mechanical properties are strongly correlated with
A:-Fabric thermal comfort B:-Fabric drape C:-Fabric dimensional stability D:-Fabric handle
Ans: D
70:-Which one of the following parameters has no influence on air permeability?
A:-Fabric cover factor B:-Yarn twist density C:-Fabric stiffness D:-Fabric porosity
Ans: C
71:-What is the GSM (g/mz) of a square jammed plain cloth made from 20 tex cotton yarns of 0.17 mm diameter?
A:-154 B:-164 C:-264 D:-364
Ans: B
72:-Which one of the following statements is false?
A:-Equa||y strong but more extensible yarn will lead to higher grab strength.
B:-The grab strength of a fabric is higher than its strip strength.
C:-Tear resistance of a fabric is only a fraction of its tensile resistance.
D:-The grab strength of a fabric reduces as the fabric width increases.
Ans: D
73:-Sublimation transfer printing is most suitable for
A:-Cotton B:-Polyster
C:-Silk D:-Acrylic
Ans: B
74:-Thermal resistance values of fabrics in an assembly are
A:-Mu|tip|icative B:-Substractive C:-Additive D:-Average
Ans: C
75:-Shear stress vs. shear strain curve of a fabric shows
A:-Linearity with hysteresis B:-Non|inearity with hysteresis
C:-Linearity without hysteresis D:-Non|inearity with hysteresis
Ans: B
76:-Self-twist spinning is most suitable for
A:-Cotton B:-Jute
C:-Flax D:-Wool
Ans: D
77:-For same count, rotor yarn TM is
A:-2 times greater than that of ring yarn. B:-10-15 % greater than ring yarn.
C:-Same as ring yarn. D:-10-15% lower than ring yarn.
Ans: B
78:-In case of Mélange yarn production, with the increase of shade depth
A:-Yarn quality deteriorates B:-Yarn quality remains same
C:-Yarn quality improves D:-Yarn quality firstly improves and then deteriorates
Ans: A
79:-In case of air-vortex spinning
A:-All fibres start from the centre of the yarn and run outside.
B:-All fibres start from the surface of the yarn and run inside.
C:-Core fibres are parallel and the sheath fibres are wrapped over the core fibres
D:-Core fibres have a twist direction which is different from the sheath fibres
Ans: A
80:-In comparison with the ring spun yarn, air-jet spun yarn is
A:-Weaker, stiffer and harder B:-Stronger, softer and smoother
C:-Weaker, bulkier and harsher D:-Stronger, hairier and evener
Ans: A
81:-Feed per nip of comber is around
A:-2 mm B:-6 mm C:-12 mm D:-18 mm
Ans: B
82:-Self-cleaning action in a comber
A:-Increases with batt weight B:-Decreases with batt weight
C:-Does not change with batt weight D:-Decrease with fibre disorientation
Ans: A
83:-Qua|ity of combing is better in
A:-Forward feed B:-Backward feed
C:-Mixed feed D:-Differential feed
Ans: B
84:-Which machine in the spinning line is termed as necessary evil for producing ring spun yarn?
A:-Card B:-Comber C:-Ring frame D:-Speed frame
Ans: D
85:-Pressure bar in draw frame is used to
A:-App|y pressure to the front top ro||er. B:-App|y pressure to the middle top ro||er.
C:-Contro| the long fibre movement. D:-Contro| the short fibre movement.
Ans: D
86:-Yarn tension during winding is proportional to the
A:-‘(Yarn tex)"(2)‘
B:-‘sqrt(Yarn tex)‘
C:-Yarn tex
D:-‘ (1)/(Yarn tex)‘
Ans: C
87:-A 3.5 crossing drum means there are
A:-1.75 turns in a double traverse B:-3.5 turns in a double traverse
C:-7 turns in a double traverse D:-10.5 turns in a double traverse
Ans: C
88:-A loom is weaving the design of 1 up 2 down twi||. If the loom is running at 240 rpm, the speed of tappet shaft will be
A:-60 rpm B:-120 rpm
C:-80 rpm D:-240 rpm
Ans: C
89:-AJacquard design is repeating on 20 cm along length and 12 cm along width. If the fabric has 30 ends and 24 picks per cm, the Jacquard capacity is
A:-240 B:-580
C:-360 D:-480
Ans: C
90:-A loom of 500 cm width is running at 800 picks/min. The weft insertion rate of the loom is
A:-800 m/min B:-4000 m/min
C:-500 m/min D:-5000 m/min
Ans: B
91:-On a Sulzer® projectile loom, the number of projectiles depends on
A:-Projecti|e mass B:-Torsion-bar arrangement
C:-Loom width D:-Projecti|e length
Ans: C
92:-Which one of the following phenomena cannot be described by Poisson distribution
A:-Number of warp breakage on a loom B:-Number of fabric defects / square meter
C:-Number of fibres in the yarn cross-section D:-Strength of the warp yarn
Ans: D
93:-If 1 Km of yarn produces 900 m fabric, the yarn crimp in the fabric is
A:-10%
B:-9%
C:-11.1%
D:-10.9%
Ans: C
94:-Indigo is a
A:-Vat dye
B:-Cationic dye
C:-Acid dye
D:-Disperse dye
Ans: A
95:-Dyeing of acrylic is carried out by using
A:-Vat dye
B:-Cationic dye
C:-Acid dye
D:-Disperse dye
Ans: B
96:-Acid dyes are held on fabric by means of
A:-Covalent bond
B:-Vander wall force
C:-Electrostatic force
D:-Electromagnetic force
Ans: C