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MCQs

Total Questions : 61 | Page 3 of 7 pages
Question 21. A process of production of water gas is carried out at ________
  1.    140-200°C
  2.    200-400°C
  3.    650-750°C
  4.    900-1000°C
 Discuss Question
Answer: Option D. -> 900-1000°C
Answer: (d).900-1000°C
Question 22. What is the maximum permissible amount of ash on carbonization after coal is washed?
  1.    2%
  2.    6%
  3.    14%
  4.    21%
 Discuss Question
Answer: Option B. -> 6%
Answer: (b).6%
Question 23. How is biogas prepared?
  1.    Decantation
  2.    Filtration
  3.    Fermentation
  4.    Sublimation
 Discuss Question
Answer: Option C. -> Fermentation
Answer: (c).Fermentation
Question 24. What is the solid residue that remains after heating of coal in the absence of air?
  1.    Resin
  2.    Coke
  3.    Powder
  4.    Whisker
 Discuss Question
Answer: Option B. -> Coke
Answer: (b).Coke
Question 25. What is the level of fineness to be achieved in crushed coal?
  1.    10-20%
  2.    25-40%
  3.    50-60%
  4.    70-80%
 Discuss Question
Answer: Option D. -> 70-80%
Answer: (d).70-80%
Question 26. Polyamide polymers with amide group –CONH is known as ________
  1.    Teflon
  2.    Resin
  3.    Nylon
  4.    Coke
 Discuss Question
Answer: Option C. -> Nylon
Answer: (c).Nylon
Question 27. Which of the following is a drawback of Nylon?
  1.    Moisture absorption
  2.    Easily Abrasive
  3.    Low Electric strength
  4.    Oil receptive
 Discuss Question
Answer: Option A. -> Moisture absorption
Answer: (a).Moisture absorption
Question 28. What is the melting point of Nylon 6?
  1.    264°C
  2.    223°C
  3.    211°C
  4.    200°C
 Discuss Question
Answer: Option B. -> 223°C
Answer: (b).223°C
Question 29. What is the amount of moisture absorption of Nylon at 65% relative humidity?
  1.    2%
  2.    4%
  3.    8%
  4.    11%
 Discuss Question
Answer: Option B. -> 4%
Answer: (b).4%
Question 30. What is the percentage of elongation of Nylon 6,6?
  1.    30%
  2.    60%
  3.    85%
  4.    200%
 Discuss Question
Answer: Option B. -> 60%
Answer: (b).60%

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