FUELS AND COMBUSTION QUIZ

Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

CO content

Dew point

CO₂ content

O₂ content

TRUE ANSWER : ?
YOUR ANSWER : ?

The gasification reaction represented by, C + H₂O = CO + H₂, is

Exothermic

Catalytic

Endothermic

Autocatalytic

TRUE ANSWER : ?
YOUR ANSWER : ?

Higher efficiency in the combustion of solid fuel can not be achieved by

Adopting efficient-fuel firing technique & equipment

Supplying correct quantity of combustion air

Keeping the flue gas exhaust temperature very high

Proper fuel preparation

TRUE ANSWER : ?
YOUR ANSWER : ?

The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

CO₂, CO, O₂

O₂, CO₂, CO

CO, O₂, CO₂

CO₂, O₂, CO

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in the oxygen content of the coal, its __________ decreases.

Caking power

Both A & B

Neither A nor B

Calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Preheating of coal charge for the coke ovens reduces the

All of these

Yield of gas and tar

Time of carbonisation

Fuel consumption in coking

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

Same as

Higher than

Lower than

Not related to

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature oxidation of coal during storage does not decrease its

None of these

Caking power

Calorific value

Oxygen content

TRUE ANSWER : ?
YOUR ANSWER : ?

Largest constituent of blast furnace gas is

H₂

CO₂

CO

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.

Moving

Fluidised

Fixed

Entrained

TRUE ANSWER : ?
YOUR ANSWER : ?

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