FUELS AND COMBUSTION QUIZ

Badly affects the quality of steel

Is not undersirable

Increases its caking power

Reduces its calorific value

Decreases

Either A or B, depends on other factors

Remains same

Increases

12.5

10

20

0

The one which is present in the residue after combustion

That present in volatile matters

Hundred minus the percentage of volatile matter, ash and moisture

The total quantity of carbon present in the coal

Wet packed scrubber

Electrostatic precipitator

Washing with monoethanolamine

Cyclone separator

As a perfume

For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)

As a motor fuel

As an explosive

All of these

It is stored in tall heaps

It contains large amount of volatile matter

Smaller fines are stored in large quantity

1350

1400

1100

1250

Non-caking

High ash

Caking

Pulverised

Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air

None of these

Supply of excess air

Supply of excess fuel