FUELS AND COMBUSTION QUIZ

Percentage of methane in coke oven gas may be around

25

5

15

50

TRUE ANSWER : ?
YOUR ANSWER : ?

In general, the limit of inflammability/explosion limit of fuel gases is widened by the

Use of pure oxygen for combustion instead of air

Increase in gas pressure

Increase in temperature (i.e. preheating)

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

In flue gas analysis by Orsat's apparatus, oxygen is absorbed by

Cuprous chloride

Alkaline pyragllol solution

None of these

Potassium hydroxide

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal with high __________ content, would ignite most easily.

Ash

Volatile matter

Oxygen

Fixed carbon

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not applicable to fluidised bed combustion of coal?

It achieves higher fuel combustion efficiency

Less heat transfer surface area is required in boilers

None of these

It can not burn low grade coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Cannel coal and boghead coal are the examples of

Sapropelic coals

None of these

Humic coals

Liptobiolites

TRUE ANSWER : ?
YOUR ANSWER : ?

Undercharging of coal in the by-product coke ovens results in

No change in the c.v. of coke oven gas

Increase in the c.v. of coke oven gas

Decrease in the c.v. of coke oven gas

Increase in its throughput

TRUE ANSWER : ?
YOUR ANSWER : ?

'Mixed gas' used in steel plants is a mixture of

Blast furnace gas and naphtha vapor

Coke oven gas and L.P.G

F. gas and coke oven gas

Coke oven gas and converter gas

TRUE ANSWER : ?
YOUR ANSWER : ?

For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

5

10

2

0.1

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following can be made into briquettes without the use of a binder?

Bituminous coal

None of these

Lignite

Anthracite coal

TRUE ANSWER : ?
YOUR ANSWER : ?

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