FUELS AND COMBUSTION QUIZ

Methane content in the coke oven gas decreases and carbon monoxide content increases

Hydrogen content of coke oven gas increases due to cracking of hydrocarbons

All of these

Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content

Height of the chimney

Neither A nor B

Density of the chimney gases

Both A & B

Ifits carbon content is very low

If its hydrogen/hydrogen compound content is zero

Under no circumstances

If its ash content is zero

Pitch-cresosote mixture (PCM)

Benzol

Ethylene

Napthalene

Increases its calorific value

Decreases its calorific value

Is not possible on commerical scale

Does not alter its calorific value

3.5

1.5

0.5

2.5

Ash disposal problem

Excessive fly-ash discharge from the stack

High power consumption in its transportation

Erosion of induced draft fan blades

8

12

22

36

>71%

In between 37 & 71%

< 37%

None of these

48

18

8

80