FUELS AND COMBUSTION QUIZ

Aromatic compounds

Paraffins

Olefins

Alphatic compounds

Theoretically required amount of air

Theoretically required amount of oxygen

More than theoretically required amount of air

Less than theoretically required amount of air

750

1100

950

500

Coal bed methane (CBM)

Natural gas

Sewage gas

Liquefied petroleum gas (LPG)

None of these

May damage its walls due to abrupt excessive swelling of coal

Increases the time of carbonisation

Produces larger size coke

Contains more volatile matter than bituminous coal

Ignites more easily than bituminous coal

Is essentially a coking coal

Burns with short, bluish, yellow-tipped flame producing very little smoke

Fussain

Neither A nor B

Vitrain

Both A & B

C₂H₆

CH₄ (upto 90%)

H₂

C₃H₈

Both steam and electrical power

Rich gas (e.g., coke oven gas)

Lean gas (e.g., B.F. gas)

Both B and C

Increase the combustion rate

Minimise the chances of clinker formation

Increase the gas production rate

Convert CO to CO₂