Home / GATE 2017-2018 / GATE Textile and Fibre :: Practice Test Paper 1

GATE 2017-2018 :: GATE Textile and Fibre

  1. Sizing of single cotton yarn leads to an increase in
  2. A.
    Strength and extensibility but decrease in bending rigidity and hairiness
    B.
    Strength and bending rigidity but decrease in extensibility and hairiness
    C.
    Strength and hairiness but decrease in extensibility and bending rigidity
    D.
    Bending rigidity and extensibility but decrease in strength and hairiness

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  3. The strength utilization of yarn in a woven fabric is
  4. A.
    Always more than 1.0
    B.
    Always less than 1.0
    C.
    Always equal to 1.0
    D.
    Either more or less than 1.0

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  5. Yarns Y1 and Y2 have the same strength when tested at 200 mm gauge length. If mass unevenness CV (%) of yarns Y1 and Y2 are 10 and 20 respectively, the ratio of the strength of yarns Y1 and Y2 when tested at 500 mm gauge length is
  6. A.
    More than 1.0
    B.
    Less than 1.0
    C.
    Equal to 1.0
    D.
    Either more or less than 1.0

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  7. Consider the following Assertion [a] and Reason [r] 
    [a] In the case of dyeing of cotton with reactive dyes, formation of hydrolyzed dye is a major problem. 
    [r] In an alkaline medium, the reactive dye reacts with the hydroxyl groups irrespective of whether these are from cellulose or water. 
    Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
  8. A.
    [a]
    B.
    [a]
    C.
    [a]
    D.
    [a]

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  9. Consider the following Assertion [a] and Reason [r] 
    [a] In the case of durable press finishing of cotton fabrics, while the citric acid can be used as a crosslinking agent, oxalic acid cannot be. 
    [r] The mechanism of crosslinking requires formation of anhydride in the intermediate step. 
    Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
  10. A.
    [a]
    B.
    [a]
    C.
    [a]
    D.
    [a]

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  11. Consider the following Assertion [a] and Reason [r] 
    [a] In the case of minimum application technique, compared to the conventional rolls of a typical padding mangle, Roberto rolls substantially reduce the wet pick up. 
    [r] The Roberto rolls are connected to vacuum pump to facilitate removal of liquor from the fabric. 
    Determine the correctness or otherwise of the above Assertion [a] and Reason [r]
  12. A.
    [a]
    B.
    [a]
    C.
    [a]
    D.
    [a]

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  13. Four polyester and four cotton carded slivers of the same count and mass CV of 4.16 % are drawn together keeping a draft of 8 on a breaker drawframe. Two slivers from breaker drawframe are further drawn along with the four cotton carded slivers keeping a draft of 6 on a finisher drawframe. 
    The polyester (%) in the final sliver is approximately
  14. A.
    8
    B.
    17
    C.
    25
    D.
    33

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  15. Four polyester and four cotton carded slivers of the same count and mass CV of 4.16 % are drawn together keeping a draft of 8 on a breaker drawframe. Two slivers from breaker drawframe are further drawn along with the four cotton carded slivers keeping a draft of 6 on a finisher drawframe.
    The mass CV (%) of the final sliver is approximately
  16. A.
    0.6
    B.
    1.24
    C.
    1.86
    D.
    2.33

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  17. A fabric is woven from 38 tex yarns of 0.65 packing coefficient and 1.54 g/cm3 fibre density. The fabric has 30 ends per cm and 25 picks per cm. Assume that warp is jammed.
    The thickness of the above fabric (mm) is approximately
  18. A.
    0.05
    B.
    0.25
    C.
    0.50
    D.
    0.75

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  19. The thermal conductivity of a nonwoven fabric is given by 
    λ = 0.03 + 0.00005ρ + 0.15/ρ 
    where λ is the thermal conductivity of the fabric in W/(m⋅K), ρ is the bulk density of the fabric in kg/m3, and ρ∈[10,200].
    Thermal conductivity is minimum when the bulk density is approximately
  20. A.
    10
    B.
    20
    C.
    55
    D.
    200

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