Fuels and Combustion

A. Preheating of fuel gases & combustion air
B. Reducing sulphur content in the fuel
C. Adopting proper fuel firing technique & fuel preparation
D. Supplying correct amount of combustion air

A. 50
B. 1000
C. 5000
D. 10000

A. H2
B. CH4
C. CO
D. None of these

A. 21% excess air has been used for combustion
B. 21% excess oxygen has been used for combustion
C. Complete combustion of fuel has taken place
D. No excess air has been used for combustion

A. 5
B. 15
C. 25
D. 50

A. Hydrolysis
B. Fermentation
C. Oxidation
D. Dehydration

A. 0.5
B. 1.5
C. 2.5
D. 3.5

A. Theoretically required amount of air
B. More than theoretically required amount of air
C. Less than theoretically required amount of air
D. Theoretically required amount of oxygen

A. 1
B. 7
C. 22
D. 46

A. Hydrogen content of coke oven gas increases due to cracking of hydrocarbons
B. Methane content in the coke oven gas decreases and carbon monoxide content increases
C. Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not
compensated by increase in CO & H2 content
D. All A., B. and C.