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

A. CO
B. H2
C. CH4
D. C2H6

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

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

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

A. 15-30
B. 1-2
C. 70-100
D. 150-200

A. Carbonisation
B. Oxidation
C. Coalification
D. Gasification