361. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of
Pitch
Fuel oil
Blast furnace gas
Bituminous coal
✅ The correct answer is option B.
Fuel and Combustion MCQs
362. Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal?
Vitrain
Clarain
Durain
Fussain
✅ The correct answer is option A.
363. Main constituents of purified Lurgi gas are
H₂, CmHn & CO₂
CO, H₂ & CH₄
CO₂, O₂ & CO
N₂, H₂ & CO₂
✅ The correct answer is option B.
365. Low temperature oxidation of stored coal results in the
Decrease in its caking power & calorific value
Decrease in its carbon & hydrogen content
Increase in its oxygen content
All of the above
✅ The correct answer is option D.
366. ‘Wind loss’ resulting from unscientific storage of coal may be the order of about __________ percent.
2.5
7.5
10.5
14.5
✅ The correct answer is option A.
367. Which of the following is the most poisonous gas?
Coke oven gas
Producer gas
Blast furnace gas
L.converter gas
✅ The correct answer is option D.
368. Higher percentage of ash in coal meant for the production of metallurgical grade coke
Decreases the hardness of coke
Decreases the abrasion resistance of coke
Causes brittleness in steel
None of these
✅ The correct answer is option D.
369. Bomb calorimeter can be used to determine the __________ of the coal.
Sulphur content
Calorific value
Both A & B
Neither A nor B
✅ The correct answer is option C.
370. Calorific value of
Light paraffinic fuel oils is equal to that of equivalent olefins
N-paraffin is lower than that of iso-paraffins of the same compounds
Light paraffinic fuel oils is higher than that of equivalent olefins
Light paraffinic fuel oils is lower than that of equivalent olefins
✅ The correct answer is option C.