Fuel and Combustion MCQs

Briquettes

Wood

Oil gas

Pitch creosote mixture

Give less yield of tar and gas on carbonisation

Burn with a small non-smoky flame

Have a very high calorific value

None of these

High amount/current of combustion air

Low amount/current of combustion air

Preheated secondary air

Very little excess air

Burning on travelling grate

Coke making

Burning on firebars

All of the above

Micrinite

Clarain

Fusinite

Liptinite

MgO & Na₂CO₃

MgSO₄ & BaCl₂

BaSO₄ & NaCl

MgCO₃ & NaCl

Producer gas

Water gas

Coke oven gas

Blast furnace gas

Require smaller combustion chamber

Have high calorific value

Have high adiabatic flame temperature

None of these

Amount of heat liberated

Flame temperature

Flue gas temperature

Any of the above

Much lower

Much higher

Same

Either lower or higher, depends on the type of fuel