Fuel and Combustion MCQs

Preheating of fuel gases & combustion air

Reducing sulphur content in the fuel

Adopting proper fuel firing technique & fuel preparation

Supplying correct amount of combustion air

High volatile matter

Low ash

High calorific value

High ash

15 to 25

35 to 45

55 to 75

75

25-80

0-15

15-25

>100

Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)

Adiabatic flame temperature

Heat release rate (thus requiring smaller combustion chamber)

All of the above

Its pulverisation (as it requires more power)

Combustion of fire slacks on the grates

Handling (e.g. when emptying wagons)

None of these

Decolourisation of sugar

Solvent recovery from air and gases

Absorption of gases and vapor

Electrode manufacture

Blast furnace gas

Coke oven gas

Water gas

Carburetted water gas

Non-luminous

Luminous

Yellow

Unburnt gases

Blast furnace gas

Hydrogen

Acetylene

Coke oven gas