# Textile Engineering and Fibre Science Syllabus for GATE 2015 Examinations

Category: Engineering Exams, Syllabus 11 0

### Textile Engineering and Fibre Science Syllabus for GATE 2015 Examinations:

(a)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 theorem.

Differential equations: linear and non linear order ODEs, high order linear ODEs with constant coefficients, Cauchy’s and Euler’s equations, Laplace transformers, PDEs – laplace, heat and wave equations.

Probability and Statistics: Mean, 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 fo trapezoidal and Simpson’s rule, single and multi-step methods for differential equations.

(b)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 bast fibres, 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-6-66, poly (ethylene terephthalate) polyacrylonitrile and polypropylene, melt spinning processes, characteristic feature 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, thermalmethods (DSC, DMA, TGA) structure and morphology of man-made fibres, mechanical properties of fibres, moisture sorption in fibres, fibre structure and property correlation.

Yarn Manufacturing 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 nad 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 style, 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 and 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 yarn production such as rotor spinning, air jet spinning, wrap spinning, twist less spinning and friction spinning.

Yarn contraction, yarn diameter, specific volume and packing coefficient, twist strength relationship in spun yarns, fibre configuration and orientation in yarn, causes of fibre migration and its estimation, irregularity index, properties or 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, feature of modern cone 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 motion, warp protection, weft replacement, functional principles of weft insertion systems of shuttle-les weaving machines, principles of multiphase and circular looms.

Principles of weft and warp knitting, basic and warp knitted structures. Classification, production and areas of application of non woven fabrics. Basic woven fabrics constructions and their derivatives, crepe, cord, terry, gauze, leno and double cloth constructions. Peirce’s equations for fabric geometry, elatica model of plain woven fabrics, thickness, cover and maximum set of woven fabrics.

Textile testing: sampling testing, sample size and sampling errors. Measurements 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, eveness testing for 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 test and analysis of variance, frequency distribution and control charts.

Preparatory processes: chemistry and practice of preparatory processes for cotton, wool and silk. Mercerization of cotton. Preparatory processes for nylon, polyster and acrylic and polyster/cotton blends.

Dyeing: classification of dyes, dyeing of cotton, wool, silk, polyster, nylon and acrylic with appropriate dye classes. Dyeing polyster/cotton and polyster/wool blends. Batchwise and continous 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 thickners. Printing auxiliaries. Printing of cotton with reactive dyes. Printing of wool, silk, nylon with acid and metal complex dyes. Printing of polyster with disperse dyes. Method of dye fixation after printing . resist and discharge printing of cotton, silk and polyster. Printing of polyster/cotton blends with disperse/ reactive combination. Transfer printing of polyster, developments in inkjet printing.

Finishing: mechanical finishing of cotton, stiff, soft wrinke resistant, water replllent, flame retardant nad enzyme (bio- polishing) finishing of cotton. Milling, decatizing  and shrink resistant finishing of wool. Antistat finishing of synthetic fibres fabrics. Heat setting of polyster.

Energy conversation: minimum application techniques

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