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MCQs

Total Questions : 126 | Page 13 of 13 pages
Question 121. The strength of 100 g/m2 fabric obtained by testing 4 cm wide strip is 0.4 kN. The tenacity (cN/tex)
of the fabric is ______.
  1.    10
  2.    100
  3.    1000
  4.    10000
 Discuss Question
Answer: Option A. -> 10


-NA-


Question 122. A square plain jammed woven fabric of 0.5 mm thickness is to be produced from polyester yarns.
Assuming circular yarn cross-section, the number of picks per cm in the fabric on the loom is
approximately
  1.    13
  2.    18
  3.    23
  4.    28
 Discuss Question
Answer: Option C. -> 23


-NA-


Question 123. On a winding machine, if the winding speed is increased from 1000 m/min to 1200 m/min, the
percentage increase in the yarn tension will be approximately
  1.    12
  2.    24
  3.    36
  4.    44
 Discuss Question
Answer: Option D. -> 44


-NA-


Question 124. Choose the correct alternative from amongst A, B, C and D Mercerization of cotton results inP    Increase in tensile strengthQ   Increase in dye uptakeR   Modification of crystal structureS   Decrease in moisture regain
  1.    P,Q,R
  2.    Q,R,S
  3.    P,S,R
  4.    P,Q,S
 Discuss Question
Answer: Option A. -> P,Q,R


-NA-


Question 125. In the case of reactive dyeing of cotton, the exhaustion is 70% and reaction efficiency is 80%.
Assuming that the initial dye concentration is 2% on the weight of fabric, the amount of unreacted
dye on the fabric expressed as a percentage of fabric weight would be
  1.    0.14
  2.    0.28
  3.    0.35
  4.    0.42
 Discuss Question
Answer: Option B. -> 0.28


-NA-


Question 126. Consider the following assertion [a] and reason [r] and choose the most appropriate answer [a] Controlled reduction treatments are commercially used for shrink resist finishing of wool [r] Reduction disrupts the disulphide bonds, which are responsible for wool shrinkage
  1.    [a]
  2.    [a]
  3.    [a]
  4.    [a]
 Discuss Question
Answer: Option C. -> [a]


-NA-


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