Fuel and Combustion MCQs

10

25

45

60

It contains large amount of volatile matter

It is stored in tall heaps

Smaller fines are stored in large quantity

All of the above

Volatile matter content increases

Carbon content decreases

Moisture content increases

Ash content increases

Reactivity with O₂

Abradability

Phosphorus content

Volatile matter content

Decreases the dew point

Increases the dew point

Reduces the combustion efficiency by limiting the permissible temperature reduction

Both B & C

Only O₂

Both O₂ and CO₂

Both O₂ and CO

All of the above

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

Sewage gas

LPG

Producer gas

Natural gas