TAMIL NADU PUBLIC SERVICE COMMISSION
                                       ASSISTANT DIRECTOR OF HANDLOOMS AND TEXTILES
                                           TEXTILE TECHNOLOGY (DEGREE STANDARD)
 
Unit I: Fibre Identification and Blend analysis
i) Textile fibre Classification.
ii) Fine, gross structure and properties of fibres
iii) Microscopic, physical and chemical test methods for fibre identification;
blend analysis
iv) Morphology characterization – Density, XRD, Electron microscopy
v) Thermal characterization methods - DSC, DMA / TMA, TGA
Unit II: Physical Properties of Fibres
i) Mechanical – Tensile, Elastic recovery,Time Effect, Bending,Twisting &
Compression
ii) Optical - Absorption and dichroism, Reflection and lustre.
iii) Electrical and Thermal Properties - Dielectric property, Static Electricity,
Structural changes in fibres on thermal treatment

Unit III: Synthetic Fibre Spinning and Post Spinning Operations
i) Requirements of fibre forming polymers
ii) Spinning of Polymers - Melt Spinning, Wet spinning, Dry spinning
iii) Post Spinning Operations – Drawing, Crimping, Heat setting, Tow-to-top
conversion, Texturing methods
Unit IV: Spinning:
i) Principles of opening, cleaning and mixing/blending of fibrous materials
ii) Draft and Drafting, Irregularity introduced by drafting
iii) Roller arrangements in drafting systems;
iv) Combing cycle, combing efficiency, lap preparation;
v) Mechanism of roving bobbin building, roving twist;
vi) Ring Cop formation, forces acting on yarn and traveller;
vii) Single and folded yarn twist, production of core spun / compact spun yarn.
viii) Alternate Spinning systems - rotor spinning, air jet spinning, friction
spinning.
ix) Principles of long staple spinning – Jute, Wool

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