Sail E0 Webinar

MCQs

Total Questions : 2441 | Page 4 of 245 pages
Question 31. Rate of low temperature oxidation of coal due to bad storage conditions
  1.    Decreases with increase in surface area
  2.    Does not vary with increase in surface area
  3.    Is more for low volatile coal compared to high volatile coal
  4.    Is accelerated by storage in large heaps with small surface to volume ratio
 Discuss Question
Answer: Option D. -> Is accelerated by storage in large heaps with small surface to volume ratio
Question 32. Which of the following is not endothermic?
  1.    Cracking
  2.    Reforming
  3.    Gasification
  4.    Partial oxidation
 Discuss Question
Answer: Option D. -> Partial oxidation
Question 33. During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the
  1.    Incomplete combustion
  2.    Complete combustion
  3.    High oxygen in flue gas
  4.    None of these
 Discuss Question
Answer: Option B. -> Complete combustion
Question 34. Which of the following is a primary fuel?
  1.    Blast furnace coke
  2.    Gasoline
  3.    Natural gas
  4.    Wood charcoal
 Discuss Question
Answer: Option C. -> Natural gas
Question 35. Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ?
  1.    Blast furnace gas
  2.    Natural gas
  3.    Producer gas
  4.    Water gas
 Discuss Question
Answer: Option B. -> Natural gas
Question 36. During combustion of coal on grate, clinker formation is increased by the
  1.    Use of thick fire bed
  2.    Low fusion point of ash (< 1100° C)
  3.    Use of preheated primary air
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 37. A good quality coal should have
  1.    Low fusion point of ash
  2.    High ash content
  3.    High sulphur
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 38. Which of the following has the highest flame speed?
  1.    CO
  2.    H₂
  3.    CH₄
  4.    C₂H₆
 Discuss Question
Answer: Option B. -> H₂
Question 39. A good coking coal should have high __________ content.
  1.    Ash
  2.    Sulphur & phosphorus
  3.    Moisture
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 40. Coke oven gas is stripped of its H₂S and mercaptans content by
  1.    Absorption in wash oil
  2.    Adsorption on bog iron bed
  3.    Bubbling it through dilute sulphuric acid
  4.    Adsorption on silica gel
 Discuss Question
Answer: Option B. -> Adsorption on bog iron bed

Latest Videos

Latest Test Papers