FUELS AND COMBUSTION QUIZ

All of these

Absence of porous or friable particles

Storage in large heaps

Storage in compressed piles

CH₄

CO₂

N₂

H₂

Is generally coking

Ignites less easily than anthracite

Burns with smoky yellow flame

Both B and C

Increase in temperature (i.e. preheating)

Use of pure oxygen for combustion instead of air

Increase in gas pressure

All of these

Clarain

Micrinite

Fusinite

Liptinite

Sapropelic coals

None of these

Liptobiolites

Humic coals

3

2

5

1

Excessive power requirement of air blower

High exit flue gas temperature from the furnace

Enhanced sensible heat loss in the flue gas

Intermittant and uncontrolled combustion of the fuel

Is friable, charcoal like substance

Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

All of these

Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation

CO

None of these

H₂

CH₄