Download PTU B.Tech 2020 March Textile 7th and 8th Sem Technical Textiles Question Paper

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Roll No. [] [] [] Total No. of Pages : 02

Total No. of Questions : 09

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B.Tech. (Textile Engg.) (2011 Onwards) (Sem.-8)

TECHNICAL TEXTILES

Subject Code : BTTE-804

M.Code : 72373

Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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1. Answer briefly :
   1. Industrial filter fabrics are predominantly surface filters.
   2. Evaluation of nonwoven pores through critical bubble pressure technique is useful for characterization of fabric for filtration.
   3. Mostly the type of fabric suitable for air filtration is not suitable for liquid filtration.
   4. HVAC filters works in different principle than industrial filter.
   5. Textile structural composite-materials are used in making many sports goods.

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   6. In liquid filtration, the combination of spun yarn and filament yarn in a twill/satin wove construction is better than plain woven fabric composed of either of the above type of yarn.
   7. Depending on the hydraulic situation Ogy pore size geotextiles should be reduced from 5Dy, towards Dy as the ground situation deteriorates.
   8. Under the soil, enhancement of fabric strength is higher in case of nonwoven fabric than woven fabric geotextiles.
   9. Melt blown nonwoven fabric offers higher filtration efficiency.
   10. Layered fabric construction in sports uniform can perform well in regulating moisture over the skin.

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SECTION-B

1. Discuss about the construction and composition of a sports garment used at very cold climate. 5
2. Discuss the effect of particle size, dust concentration and filtration velocity on the filtration performance of industrial filter bag house. 5

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3. Discuss how a geotextiles under the railway track usually satisfy many functional requirements. 5
4. Differentiate between reverse jet and pulse jet filtration in terms of mechanism, working and their suitability. 5
5. Discuss the composition/constructions of the following :
   1. Sutures 2
   2. Wound dressing material 3

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SECTION-C

1. Define the following parameters and state their significance for geotextiles :
   1. Permittivity
   2. Transmitivity
   3. Oos
   4. Creep

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   5. Shear angle
2. Discuss the manufacturing process of tyre cord and also state its quality characteristics.
3. 1. State the characteristics to be tested to evaluate the suitability geotextile material for the following application :
      1. Embankment stability 2.5
      2. Retaining wall 2.5

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   2. Show the arrangement of the apparatus for testing permittivity and transmitivity of geotextile material. State the impact of thickness on the above characteristics. 5

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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