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MCQs

Total Questions : 2441 | Page 241 of 245 pages
Question 2401. During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the _______________ of the mass?
  1.    Density
  2.    Porosity
  3.    Electrical resistivity
  4.    None of these
 Discuss Question
Answer: Option A. -> Density
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2402. Mineral matter, ‘M’ and ash percentage ‘A’ in coal are roughly related as_______________?
  1.    M = 1.8 A
  2.    M = 0.5 A
  3.    M = 1.1 A
  4.    M = A
 Discuss Question
Answer: Option C. -> M = 1.1 A
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2403. Flue gas from the heating chamber of by product coke ovens is removed by________________?
  1.    Forced draft fan
  2.    Induced draft fan
  3.    Steam ejector
  4.    Natural draft
 Discuss Question
Answer: Option D. -> Natural draft
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2404. Temperature of coke oven gas just before entering into saturator (for recovery of NH3) is about ______________ °C?
  1.    30
  2.    65
  3.    120
  4.    180
 Discuss Question
Answer: Option B. -> 65
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2405. Which of the following is used for making the explosive „TNT‟ ?
  1.    Benzol
  2.    Toluene
  3.    Pyridine
  4.    Cerosote
 Discuss Question
Answer: Option B. -> Toluene
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2406. Safe condition for storage of high V.M. bituminous coal is that ___________________?
  1.    Height of the coal heap should be < 3 metres
  2.    Maximum 200 tons should be stored in a heap
  3.    Both A. and B.
  4.    Neither A. nor B.
 Discuss Question
Answer: Option C. -> Both A. and B.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2407. The function of secondary combustion air is to ______________________?
  1.    Pneumatically convey the pulverised coal
  2.    Completely burn the volatile matter
  3.    Burn the lumpy coal
  4.    None of these
 Discuss Question
Answer: Option B. -> Completely burn the volatile matter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2408. Incomplete combustion of fuel in the furnace is judged by high _____________ of the flue gases?
  1.    CO content
  2.    Dew point
  3.    CO2 content
  4.    O2 content
 Discuss Question
Answer: Option A. -> CO content
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2409. Producer gas containing least amount of tar is produced by the_________________?
  1.    Partial combustion of coal
  2.    Partial combustion of large size (< 50 mm) coke
  3.    High pressure gasification of coal (e.g. in Lurgi gasifier)
  4.    Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)
 Discuss Question
Answer: Option B. -> Partial combustion of large size (< 50 mm) coke
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2410. By-products are _____________ recovered in ‘Beehive ovens’ ?
  1.    Fully
  2.    Partially
  3.    Not at all
  4.    Negligibly
 Discuss Question
Answer: Option C. -> Not at all
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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