FUELS AND COMBUSTION QUIZ

A coal with high ash content

Has higher calorific value

Is harder and stronger

Is not subjected to washing

Has low quantity of mineral matter

TRUE ANSWER : ?
YOUR ANSWER : ?

If oxygen content in the flue gas rises too high, fuel is being wasted by

Incomplete combustion

Moisture loss

Dry gas/stack gas loss

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Percentage of nitrogen in blast furnace gas may be around

5

55

80

25

TRUE ANSWER : ?
YOUR ANSWER : ?

Out of the following, which is the most important parameter for the blast furnace grade coke?

Volatile matter content

Moisture content

Ash content

CSR & CRI

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following fuels is the best for burning on chain grate stoker?

Pulverised coal

Non-caking coal

Caking coal

Coking coal

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum adiabatic flame temperature is attained, when the fuel is burnt with

Theoretically required amount of oxygen

More than theoretically required amount of air

Theoretically required amount of air

Less than theoretically required amount of air

TRUE ANSWER : ?
YOUR ANSWER : ?

Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.

5

75

25

55

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³.

10000

2500

6500

4000

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal containing high amount of volatile matter will have

Low ignition temperature

Very little ash content

Low adiabatic flame temperature

High fusion point of its ash

TRUE ANSWER : ?
YOUR ANSWER : ?

A fuel with high heat release rate will

None of these

Have high calorific value

Require smaller combustion chamber

Have high adiabatic flame temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

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