FUELS AND COMBUSTION QUIZ

Preheating of combustion air is done to

Increase the adiabatic flame temperature

Complete the combustion of fuel

Reduce its requirement for effecting the complete combustion

Increase the calorific value of the fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Benzene is used

As a perfume

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

As an explosive

As a motor fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

L.D. converter gas (produced in steel plant) comprises mainly of

CO₂ & H₂

CO & O₂

CO₂ & O₂

CO (upto 65%) & CO₂

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .

4500

1800

10000

800

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick the odd man out.

Pitch creosote mixture

Oil gas

Wood

Briquettes

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around __________ percent.

40

20

96

4

TRUE ANSWER : ?
YOUR ANSWER : ?

Increase in ash content of blast furnace coke

Decreases its hardness and abrasion resistance

Does not affect its consumption in the furnace

Increases its consumption in the furnace

Reduces its consumption in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most poisonous gas?

L.D. converter gas

Blast furnace gas

Coke oven gas

Producer gas

TRUE ANSWER : ?
YOUR ANSWER : ?

During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

High oxygen in flue gas

Complete combustion

Incomplete combustion

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

High pressure coal gasification is employed in __________ process.

None of these

Kopper-Totzek

Winkler

Lurgi

TRUE ANSWER : ?
YOUR ANSWER : ?

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