A. Much lower
B. Much higher
C. Same
D. Either lower or higher, depends on the type of fuel
A. 1
B. 5
C. 50
D. 100
Ammonia content in raw coke oven gas is about _____________ gm/Nm3? Read More »
Fuels and Combustion A. Sulphur
B. Oxygen
C. Hydrogen
D. Carbon
A. 200 meters
B. Infinitely long
C. More than 105.7 metres
D. Equal to the height of the hot gas column producing draught
For maximum discharge through a chimney, its height should be___________________? Read More »
Fuels and Combustion A. CO
B. H2
C. CH4
D. C2H6
Which of the following has the highest flame speed ? Read More »
Fuels and Combustion A. Furnace oil, light diesel oil and tar/PCM
B. Pulverised coking coal
C. Coal middling from washeries
D. B.F. gas, coke oven gas and L.D. converter gas
A. Heat losses
B. Long flame
C. Condensation of water vapour from the fuel gas
D. None of these
Use of excess of combustion air in the combustion of fuels results in__________________? Read More »
Fuels and Combustion A. Requirement of large volume combustion chamber
B. Risk of explosion
C. Chances of clinker formation
D. Incomplete combustion of coal
A. Coke oven gas
B. Water gas
C. Natural gas
D. Producer gas
Which of the following is called “blue gas”? Read More »
Fuels and Combustion A. Decreases with increase in surface area
B. Does not vary with increase in surface area
C. Is more for low volatile coal compared to high volatile coal
D. Is accelerated by storage in large heaps with small surface to volume ratio
Rate of low temperature oxidation of coal due to bad storage conditions_______________? Read More »
Fuels and Combustion