Last year question papers of GATE of Textile Engineering and Fibre Science

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[Raman Vij]

As you want to get the Last year question papers of GATE of Textile Engineering and Fibre Science so here it is for you:

Here for your reference I am giving you the syllabus of GATE of Textile Engineering and Fibre Science:

ENGINEERING MATHEMATICS

Linear Algebra: Matrices and Determinants, Systems of linear equations, Eigen values and eigen vectors.

Calculus: Limit, continuity and differentiability; Partial Derivatives; Maxima and minima; Sequences and series; Test for convergence; Fourier series.

Vector Calculus: Gradient; Divergence and Curl; Line; surface and volume integrals; Stokes, Gauss and Green’s theorems.

Diferential Equations: Linear and non-linear first order ODEs; Higher order linear ODEs with constant coefficients; Cauchy’s and Euler’s equations; Laplace transforms; PDEs –Laplace, heat and wave equations.

Probability and Statistics: Mean, median, mode and standard deviation; Random variables; Poisson, normal and binomial distributions; Correlation and regression analysis.

Numerical Methods: Solutions of linear and non-linear algebraic equations; integration of trapezoidal and Simpson’s rule; single and multi-step methods for differential equations.

TEXTILE ENGINEERING AND FIBRE SCIENCE

Textile Fibres: Classification of textile fibres; Essential requirements of fibre forming polymers; Gross and fine structure of natural fibres like cotton, wool and silk. Introduction to important bastfibres; properties and uses of natural and man-made fibres; physical and chemical methods of fibre and blend identification and blend analysis.
Molecular architecture, amorphous and crystalline phases, glass transition, plasticization, crystallization, melting, factors affecting Tg and Tm; Process of viscose and acetate preparation. Polymerization of nylon-6, nylon-66, poly (ethylene terephthalate), polyacrylonitrile and polypropylene; Melt Spinning processes, characteristic features of PET, polyamide and polypropylene spinning; wet and dry spinning of viscose and acrylic fibres; post spinning operations such as drawing, heat setting, tow-to-top conversion and different texturing methods.
Methods of investigating fibre structure e.g., Density, X-ray diffraction, birefringence, optical and electron microscopy, I.R. absorption, thermal methods (DSC, DMA/TMA, TGA); structure and morphology ofman-made fibres, mechanical properties of fibres, moisture sorption in fibres; fibre structure and property correlation.

Yarn manufacture and yarn structure & properties: Principles of opening, cleaning and mixing/blending of fibrous materials, working principle of modern opening and cleaning equipments; the technology of carding, carding of cotton and synthetic fibres; Drafting operation, roller and apron drafting principle, causes of mass irregularity introduced by drafting; roller arrangements in drafting systems; principles of cotton combing, combing cycle, mechanism and function, combing efficiency, lap preparation; recent developments in comber; Roving production, mechanism of bobbin building, roving twist; Principle of ring spinning, forces acting on yarn and traveler; ring & traveler designs; mechanism of cop formation, causes of end breakages; working principle of ring doubler and two for one twister, single and folded yarn twist, properties of double yarns, production of core spun yarn, compact spinning, principle of non conventional methods of yarn production such as rotor spinning, air jet spinning, wrap spinning, twist less spinning and friction spinning.
Yarn contraction, yarn diameter, specific volume & packing coefficient; twist strength relationship in spun yarns; fibre configuration and orientation in yarn; cause of fibre migration and its estimation, irregularity index, properties of ring, rotor and air-jet yarns.

Fabric manufacture and Fabric Structure: Principles of cheese and cone winding processes and machines; random and precision winding; package faults and their remedies; yarn clearers and tensioners; different systems of yarn splicing; features of modern cone winding machines; different types of warping creels; features of modern beam and sectional warping machines; different sizing systems, sizing of spun and filament yarns, modern sizing machines; principles of pirn winding processes and machines; primary and secondary motions of loom, effect of their settings and timings on fabric formation, fabric appearance and weaving performance; dobby and jacquard shedding; mechanics of weft insertion with shuttle; warp and weft stop motions, warp protection, weft replenishment; functional principles of weft insertion systems of shuttle-less weaving machines, principles of multiphase and circular looms.
Principles of weft and warp knitting; basic weft and warp knitted structures. Classification, production and areas of application of nonwoven fabrics.Basic woven fabric constructions and their derivatives; crepe, cord, terry, gauze, leno and double cloth constructions. Peirce’s equations for fabric geometry; elastica model of plain woven fabrics; thickness, cover and maximum sett of woven fabrics.

Textile Testing: Sampling techniques, sample size and sampling errors. Measurement of fibre length, fineness, crimp, strength and reflectance; measurement of cotton fibre maturity and trash content; HVI and AFIS for fibre testing. Measurement of yarn count, twist and hairiness; tensile testing of fibres, yarns and fabrics; evenness testing of slivers, rovings and yarns; testing equipment for measurement test methods of fabric properties like thickness, compressibility, air permeability, drape, crease recovery, tear strength, bursting strength and abrasion resistance. FAST and Kawabata instruments and systems for objective fabric evaluation.Statistical data analysis of experimental results.Correlation analysis, significance tests and analysis of variance; frequency distributions and control charts.

Preparatory Processes: Chemistry and practice of preparatory processes for cotton, wool and silk. Mercerization of cotton.Preparatory processes for nylon, polyester and acrylic and polyester/cotton blends.

Dyeing: Classification of dyes. Dyeing of cotton, wool, silk, polyester, nylon and acrylic with appropriate dye classes. Dyeing polyester/cotton and polyester/wool blends. Batchwise and continuous dyeing machines. Dyeing of cotton knitted fabrics and machines used. Dye fibre interaction. Introduction to thermodynamics and kinetics of dyeing.Methods for determination of wash, light and rubbing fastness.Evaluation of fastness properties with the help of grey scale.

Printing: Styles of printing. Printing thickeners including synthetic thickeners. Printing auxiliaries. Printing of cotton with reactive dyes. Printing of wool, silk, nylon with acid and metal complex dyes. Printing of polyester with disperse dyes. Methods of dye fixation after printing. Resist and discharge printing of cotton, silk and polyester. Printing of polyester/cotton blends with disperse/reactive combination. Transfer printing of polyester. Developments in inkjet printing.

Finishing: Mechanical finishing of cotton. Stiff. Soft, wrinkle resistant, water repellent, flame retardant and enzyme (bio-polishing) finishing of cotton.Milling, decatizing and shrink resistant finishing of wool.Antistat finishing of synthetic fibre fabrics. Heat setting of polyester.

Energy Conservation: Minimum application techniques.

Pollution: Environment pollution during chemical processing of textiles. Treatment of textile effluents.

Question Paper


Q.1 Density of cotton fibre is approximately
(A) 1.52 denier (B) 1.52 g/tex (C) 1.52 kg/m3 (D) 1.52 g/cm3

Q.2 The byproduct obtained from polycondensation of diethylene glycol terephthalate (DGT) is
(A) Glycolic acid
(B) Water
(C) Diethylene glycol
(D) Ethylene glycol

Q.3 Ziegler Natta catalyst is used in the polymerization of
(A) PET
(B) Nylon
(C) Acetate
(D) Polypropylene

Q.4 The cross-section of spinneret used for producing hollow fibres is
(A) C-shaped
(B) Rectangular
(C) Annular concentric
(D) Triangular

Q.5 For a given yarn count made from the same fibre, rotor spun yarn is bulkier than ring spun yarn, because
(A) Rotor spun yarn is more even than ring spun yarn
(B) Navel tube peels off the fibres from rotor spun yarn surface
(C) Rotor spun yarn has large number of wrapper fibres
(D) Yarn tension in rotor spinning is lower as compared to that in ring spinning

Q.6 Consider the statement, ‘off-setting the front top drafting roller towards the front is beneficial in a ring spinning machine’. Which one of the following CANNOT be the reason for the same?
(A) It reduces the hairiness of yarn
(B) It results in smooth running of top drafting roller
(C) It reduces end breaks
(D) It results in shorter spinning triangle

Q.7 20s, 30s, 40s and 50s Ne cotton yarns have the same twist per cm. The yarn having maximum fibre obliquity is
(A) 20s Ne (B) 30s Ne (C) 40s Ne (D) 50s Ne

Q.8 During roller drafting, better fibre control is achieved by flexing the fibre strand over the bottom roller. The reason for this is
(A) Enhanced fibre to fibre coefficient of friction
(B) Enhanced fiber to fibre friction
(C) Reduced slippage of top roller
(D) Reduced fibre to metal friction

TF 2011 TEXTILE ENGG. & FIBRE SCIENCE – TF
Q.9 For 2/2 twill weave, the heald shaft movement over one complete repeat will be the least in
(A) Bottom closed shed
(B) Semi open shed
(C) Centre closed shed
(D) Open shed

Q.10 In a flat bed knitting machine, the loop length is controlled by
(A) Raising cam
(B) Stitch cam
(C) Clearing cam
(D) Guard cam

Q.11 In a drum driven winder
(A) Traverse ratio is constant
(B) Traverse ratio reduces with the increase in package diameter
(C) Angle of wind increases with the increase in package diameter
(D) Angle of wind reduces with the increase in package diameter

Q.12 The power required for picking in a shuttle loom depends on
(A) Weave of the fabric (B) Number of heald shafts
(C) Reed width (D) Number of picking cams

Q.13 Out of the following, the one which is NOT a surfactant is
(A) Reducing agent (B) Wetting agent (C) Detergent (D) Dispersing agent

Q.14 The machine used for continuous processing of fabric is
(A) Winch (B) Kier
(C) J-Box (D) Jigger

Q.15 An example of a coagulant used in textile effluent treatment is
(A) Activated carbon
(B) Ferrous sulphate
(C) Hydrogen peroxide
(D) Sodium chloride

Q.16 Microbes growing on clothing derive nutrition from
(A) Atmospheric oxygen
(B) Digestion of polymer
(C) Sweat and contaminants
(D) Moisture in the air

Q.17 If the 50 % span length of a cotton fibre is 13.5 mm and the uniformity ratio is 45 %, then 2.5 % span length of this fibre in mm would be
(A) 10 (B) 15 (C) 30 (D) 35

Q.18 The nep setting on an evenness tester which will give the highest nep count is
(A) +400 % (B) +280 % (C) +200 % (D) +140 %

TF 2011 TEXTILE ENGG. & FIBRE SCIENCE – TF
Q.19 Fabrics with the same sett but different weaves are woven on a loom. The tear strength will be minimum in a fabric having
(A) Plain weave (B) 3/1 twill weave (C) 5-end satin weave (D) 2/2 matt weave

Q.20 The property of fabric which influences drape the most is
(A) Tensile
(B) Compressional
(C) Shear
(D) Surface

Q.21 Probability of occurrence of two events E1 and E2 is 0.25 and 0.5, respectively. The probability of their simultaneous occurrence is 0.14. The probability that neither E1 nor E2 occurs is
(A) 0.11 (B) 0.25 (C) 0.39 (D) 0.86

Q.22 The value of is
(A) 0 (B) n (C) ∞ (D) 1/n

Q.23 The area of an ellipse with ‘a’ and ‘b’ as the length of major and minor axis, respectively, is
(A) (B) (C) (D)

Q.24 The order and degree of the following differential equation are

(A) order 1, degree 1 (B) order 1, degree 2 (C) order 2, degree 1 (D) order 2, degree 2

Q.25 X and Y are two matrices such that XY and X+Y are both defined. The CORRECT statement from amongst the following is
(A) X and Y are square matrices of the same order
(B) X is a square matrix whereas Y is a rectangular matrix
(C) X and Y are diagonal matrices of different order
(D) X and Y are rectangular matrices

Q. 26 to Q. 55 carry two marks each.
Questions Q.26 to Q.30 are numerical answer type. The answer to each of these questions is either a positive whole number, or a positive real number with maximum of 3 decimal places.
Q.26 A filament yarn of 300 denier is being spun at a take up speed of 900 m/min. Assuming the density of the melt as 1.2 g/cm3, the throughput speed (cm3/min) at the spinneret would be

Q.27 The delivery rate of a roving machine is 20 m/min. Assuming the flyer speed as 1000 rpm, inner diameter of the flyer top as 1 cm, diameter of roving as 2.5 mm, and the slippage between the flyer top and roving as 50 %, the false twist (turns/m) in the roving above the flyer is

TF 2011 TEXTILE ENGG. & FIBRE SCIENCE – TF TF
Q.28 For a sizing process, the target add-on (%) and the size paste concentration (%) is 10 and 20, respectively. If the oven dry mass of the supply warp sheet is 100 kg, the mass of water in kg to be evaporated from the warp sheet during drying is

Q.29 A garment factory manufactures shirts. From the past history, it is known that 8 out of 100 collars and 5 out of 100 sleeves are defective. The probability that the assembled shirt will NOT have either of these defects is

Q.30 A yarn has mean strength of 10 N with a standard deviation of 1 N. The number of tests which must be conducted, so that at 95 % confidence level, maximum error in the estimated mean strength is 1.96 %, is

Questions Q.31 to Q.55 are multiple choice type.
Q.31 Given below are the load-elongation characteristics of two monofilament yarns A and B having the same denier and the work of rupture. Consider the following assertion [a] and reason [r].
[a] Fabrics made from these two yarns, with the same weave and sett, will have the same resistance to high impact.
[r] The work of rupture of the two fabrics is the same.
(A) [a] is right and [r] is wrong
(B) [a] is wrong and [r] is right
(C) Both [a] and [r] are right
(D) Both [a] and [r] are wrong

Q.32 Consider the following assertion [a] and reason [r] in the case of high bulk yarn.
[a] Acrylic high bulk yarn is a commercial success but not the polypropylene high bulk yarn.
[r] Amorphous orientation can be easily frozen in acrylic fibres but not in polypropylene fibres.
(A) [a] is right and [r] is wrong
(B) [a] is wrong and [r] is right
(C) Both [a] and [r] are right
(D) Both [a] and [r] are wrong

2011 TEXTILE ENGG. & FIBRE SCIENCE – TF
Q.33 atch the items in Group I with those in Group II.
Group I
Group II
P
Crystallinity
1
Sonic modulus tester
Q
Surface features
2
Infrared spectrophotometer
R
Orientation
3
Scanning electron microscope
S
Functional groups
4
Differential scanning calorimeter
M
(A) P-1, Q-2, R-3, S-4
(B) P-3, Q-2, R-1, S-4
(C) P-4, Q-3, R-1, S-2
(D) P-4, Q-3, R-2, S-1

Q.34 Determine the correctness or otherwise of the following assertion [a] and reason [r].
[a] When the bales are highly compressed, photo cells near the inclined spiked lattice of a Hopper
bale opener are set at a lower height.
[r] Position of photo cells controls the mass flow rate of tufts within the Hopper bale opener
(A) [a] is right and [r] is wrong
(B) [a] is wrong and [r] is right
(C) Both [a] and [r] are right
(D) Both [a] and [r] are wrong

Q.35 The ring rail moves up and down in a cyclic manner during formation of a cop. The combination of events occurring during upward traverse of the ring rail is
P) Traveller speed decreases
Q) Balloon tension decreases
R) More yarn is wound by the traveller
S) Balloon tension increases
(A) P, Q, S (B) P, Q, R (C) Q, R, S (D) P, R, S

Q.36 Match the items in Group I with those in Group II.
Group I
Group II
P
Ring spinning
1
Real twist, mechanical twisting, low fibre migration, aerodynamic drafting
Q
Rotor spinning
2
False twist, aerodynamic twisting, low fibre migration, roller drafting
R
Air-vortex spinning
3
Real twist, mechanical twisting, high fibre migration, roller drafting
S
Air-jet spinning
4
Real twist, aerodynamic twisting, high fibre migration, roller drafting
(A) P-3, Q-2, R-1, S-4
(B) P-4, Q-3, R-2, S-1
(C) P-3, Q-1, R-4, S-2
(D) P-3, Q-2, R-4, S-1

Q.37 For a 5/3 twill weave, if the rotational speeds of the crank shaft, bottom shaft and tappet shaft are X, Y and Z respectively, then X:Y:Z would be
(A) 1:4:8 (B) 8:4:1 (C) 2:1:1 (D) 2:1:8

TF 2011 TEXTILE ENGG. & FIBRE SCIENCE – TF
Q.38 In air-jet weaving, the acceleration of the weft yarn will be maximum when the yarn is
(A) Coarser and more hairy
(B) Coarser and less hairy
(C) Finer and less hairy
(D) Finer and more hairy

Q.39 For a plain woven fabric, the diameters of warp and weft yarns are 0.2 mm and 0.3 mm, respectively. The crimp in warp yarn is 9 % and pick spacing is 0.4 mm. The fabric thickness in mm is
(A) 0.32 (B) 0.50 (C) 0.64 (D) 0.75

Q.40 Match the items in Group I with those in Group II.
Group I
Group II
P
Sodium formaldehyde sulphoxylate
1
Hygroscopic agent
Q
Urea
2
Mild oxidizing agent
R
Resist salt
3
Thickener
S
Carboxy methyl cellulose (CMC)
4
Reducing agent
(A) P-2, Q-3, R-1, S-4 (B) P-4, Q-1, R-3, S-2
(C) P-3, Q-4, R-2, S-1 (D) P-4, Q-1, R-2, S-3

Q.41 Determine the correctness or otherwise of the following assertion [a] and the reason [r].
[a] Phosphorus and nitrogen based agents act as vapour phase flame retardants for cotton.
[r] Phosphorus yields phosphoric acid and hinders formation of levoglucosan while nitrogen has a synergistic effect.
(A) [a] is right and [r] is wrong
(B) [a] is wrong and [r] is right
(C) Both [a] and [r] are right
(D) Both [a] and [r] are wrong

Q.42 Match the items in Group I with those in Group II.
Group I
Group II
P
Crabbing
1
Cut and remove projecting fibres
Q
Decatising
2
Moisture, heat, mechanical action
R
Milling
3
Perforated drum with saturated steam
S
Cropping
4
Winding, treatment with hot water
(A) P-4, Q-3,R-2,S-1 (B) P-3, Q-4, R-2, S-1
(C) P-2,Q-3, R-4, S-1 (D) P-4, Q-3, R-1, S-2

Q.43 The coarsest yarn amongst the following is
(A) 100 Ne (B) 50 denier (C) 50 dtex (D) 200 Nm

TF 2011 TEXTILE ENGG. & FIBRE SCIENCE – TF
Q.44 Two cotton fibre varieties X and Y having linear density of 3.1 and 3.9 (micrograms/25.4 mm), respectively, are tested on an airflow instrument. The highest flow rate is obtained in the case of
(A) Fibre X with maturity ratio 0.9
(B) Fibre X with maturity ratio 1.0
(C) Fibre Y with maturity ratio 0.9
(D) Fibre Y with maturity ratio 1.0

Q.45 Warp and weft yarns with diameters of 0.4 mm and 0.6 mm, respectively, are used to produce plain woven fabric with end spacing of 0.8 mm and pick spacing of 1.2 mm. Assuming the degree of flattening to be 0.8 in both warp and weft yarns, the approximate fabric cover would be
(A) 0.56 (B) 0.66 (C) 0.76 (D) 0.86

Q.46 If the error in the measurement of the diameter of a yarn is 0.5 %, the error in the estimated cross-sectional area of this yarn would be
(A) 0.25 % (B) 1.0 % (C) 2.5 % (D) 5.0 %

Q.47 The acceleration (a) of a cotton tuft flowing through a duct in a straight line follows the relationship
where acceleration (a) is in cm/s2 and time (t) is in s. The velocity (cm/s) of the tuft when acceleration is zero is
(A) 160 (B) 180 (C) 200 (D) 220

Common Data Questions
Common Data for Questions 48 and 49:
Consider the following data for a synthetic fibre.
Density of amorphous region (ρa ) as 1.33 g/cm3, density of crystalline region (ρc ) as 1.45 g/cm3, density of fibre (ρf ) as 1.36 g/cm3 and diameter of the fibre as 14 micron.
Q.48 Denier of the fibre is approximately
(A) 1 (B) 2 (C) 3 (D) 4

Q.49 Density of the above fibre increased by 2.2 % when drawn. The corresponding change (%) in crystallinity is approximately
(A) 50 (B) 100 (C) 150 (D) 200

Common Data for Questions 50 and 51:
A card with a doffer of diameter 60 cm, fed with a lap of 395 ktex delivers sliver of 3.95 ktex. The draft between the doffer and the coiler calender roller is 1.4.

Q.50
The total draft of the card is
(A) 71 (B) 140 (C) 100 (D) 171

Q.51 If the doffer speed is 50 rpm, the approximate production rate of the card in kg/h would be
(A) 6 (B) 22 (C) 31 (D) 88

TF 2011 TEXTILE ENGG. & FIBRE SCIENCE – TF TF
Linked Answer Questions
Statement for Linked Answer Questions 52 and 53:
For a shuttle loom, the radius of crank and length of the connecting rod to the sley are 10 cm and 40 cm, respectively.

Q.52
The value of sley eccentricity is
(A) 0.25 (B) 0.50 (C) 1.0 (D) 4.0

Q.53 The ratio of sley acceleration at the front centre and back centre of the loom is
(A) 0.25 (B) – 0.60 (C) – 1.67 (D) 4.0

Statement for Linked Answer Questions 54 and 55:
Four percent add on (owf) of a finish is required on a fabric having a weight of 0.60 kg/m. Consider the wet pick up as 80 %, speed of the fabric as 90 m/min and density of liquor as 1.2 g/ml.
Q.54 Concentration (%) of the finish required in the bath is
(A) 0.2 (B) 3.2 (C) 5.0 (D) 32

Q.55 Finish consumed in kg/min is
(A) 2.16 (B) 2.70 (C) 5.00 (D) 5.40

2011
General Aptitude (GA) Questions
Choose the most appropriate word or phrase from the options given below to complete the following sentence.
The environmentalists hope ________ the lake to its pristine condition.
Choose the word from the options given below that is most nearly opposite in meaning to the given word:
Polemical
(A) imitative
(C) truthful
Despite the mixture’s ______ nature, we found that by lowering its temperature in the laboratory we could dramatically reduce its tendency to vaporize.
(A) acerbic
(B) resilient
(C) volatile
(D) heterogeneous
(D) m days
Q. 61 to Q. 65 carry two marks each.
2011
(A) 0
E600: Experimental Techniques for Engineers
The registration data for the M.Tech class shows that 100 students have taken M600, 200 students have taken C600, and 60 students have taken E600. What is the maximum possible number of students in the class who have taken all the above three subjects?
(A) 20
(C) 11
Q.64
The lowest contribution among all the above factors to the overall quality of services delivered by the company is
(A) 10%
(B) 20%
(C) 24%
(D) 40%
2011
Q.65
In order to develop to full potential, a baby needs to be physically able to respond to the environment.
It can be inferred from the passage that
(A) Full physical potential is needed in order for a baby to be able to respond to the environment.
(B) It is necessary for a baby to be able to physically respond to the environment for it to develop
its full potential.
(C) Response to the environment of physically able babies needs to be developed to its full
potential.
(D) A physically able baby needs to develop its full potential in order to respond to its environment.