141. Which of the following is a single stage, fixed bed high pressure coal gasification process?
Winkler process
Kopper-Totzek process
Lurgi Process
None of these
✅ The correct answer is option C.
Fuel and Combustion MCQs
142. Sulphur in metallurgical coal
Contributes to its heating value
Affects the quality of steel produced as cracks develop on the surface while rolling the steel
Both A and B
Neither A nor B
✅ The correct answer is option C.
143. During its calorific value determination by bomb calorimeter, coal is combusted by
Air
Oxygen
Oxygen enriched air
None of these
✅ The correct answer is option B.
144. Undercharging of coal in the by-product coke ovens results in
Decrease in the c.v. of coke oven gas
Increase in its throughput
Increase in the c.v. of coke oven gas
No change in the c.v. of coke oven gas
✅ The correct answer is option A.
145. A coal having high amount of volatile matter
Would require smaller combustion chamber
Produces very little of tar and gas on carbonisation
Ignites easily and burns with long smoky flame
All of the above
✅ The correct answer is option D.
146. Presence of force moisture in coal is most disadvantageous during its
Transportation and handling
Washing
Pulverisation
Storage
✅ The correct answer is option C.
147. Blast furnace gas constitutes mainly of
N₂ & CH₄
N₂ & H₂
N₂ & CO
CH₄ & CO₂
✅ The correct answer is option C.
148. Ignition temperature of a fuel in air is __________ that in pure oxygen.
More than
Less than
Equal to
Either more or less; depends on the type of fuel
✅ The correct answer is option A.
149. Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.
550
750
950
1150
✅ The correct answer is option C.
150. Most of the coking coals are
Anthracite
Bituminous
Lignite
None of these
✅ The correct answer is option B.