11.5
0.5
23
12
✅ The correct answer is option A.
Engineering
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3372. Anthracite can be used for
Recarbonising steel
Making carbon electrodes
Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
All of the above
✅ The correct answer is option D.
3373. The shift conversion reaction taking place during water gas manufacture is given by
C + H₂O ⟷ CO + H₂
C + 2H₂O ⟷ CO₂ + 2H₂
CO + H₂O ⟷ CO₂ + H₂
None of these
✅ The correct answer is option C.
3374. Insitu theory and drift theory are related to the
Origin of petroleum oil
Origin of coal
Coalification
Variation of coal quality with depth
✅ The correct answer is option B.
3375. Preheating of a gaseous fuel results in increased
Flame length
Flame temperature
Quantity of flue gas
Ignition temperature
✅ The correct answer is option B.
3376. A coal with high __________ content, would ignite most easily.
Fixed carbon
Volatile matter
Ash
Oxygen
✅ The correct answer is option B.
3377. Blast furnace gas compared to coke oven gas has
Lower ignition temperature
Narrower limit of inflammability
Higher calorific value
Lower theoretical flame temperature
✅ The correct answer is option D.
3378. Carbon Content by weight in air dried wood may be about __________ percent.
10
25
50
80
✅ The correct answer is option C.
3379. __________ present in coal is not determined in its ultimate analysis.
Fixed carbon
Total carbon
Hydrogen
Nitrogen
✅ The correct answer is option A.
3380. Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called
Back draughting
Banking
Under pressurising
None of these
✅ The correct answer is option B.