Less moisture content
High fusion point of its ash
High bulk density
Lower ash content
✅ The correct answer is option B.
Fuel and Combustion MCQs
Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.
300
2000
5000
10000
✅ The correct answer is option B.
Ammonia content in raw coke oven gas is about __________ gm/Nm³.
1
15
50
100
✅ The correct answer is option B.
Benzol is used
As a motor fuel blend
For producing benzene, tolune & xylene by its distillation
Both A & B
Neither A nor B
✅ The correct answer is option C.
Fusion point of coal ash increases with increase in its __________ content.
Iron sulphate
Iron silicate
Lime and magnesia
All of the above
✅ The correct answer is option D.
High amount of sulphur and phosphorous in coke causes
Decrease in its calorific value
Increase in its strength
Brittleness of steel made by using it
None of these
✅ The correct answer is option C.
Coke oven gas compared to blast furnace gas is
More explosive and inflammable
Less poisonous
Lighter
All of the above
✅ The correct answer is option D.
Coke made in narrower by-product coke ovens (as compared to wider ovens) is
Less reactive
Stronger
Smaller in size
All of the above
✅ The correct answer is option D.
The calorific value of a gas of composition CO₂ = 20%, H₂ = 50%, CH₄ = 30%, is y. If the composition of gas is changed to H₂ = 50%, CH₄ = 30%, CO₂ = 10%, N₂ = 10%, then the calorifice value will be
Y
0.95 y
1.05 y
1.8 y
✅ The correct answer is option A.
Presence of phosphorous in metallurgical coal
Is not undersirable
Reduces its calorific value
Badly affects the quality of steel
Increases its caking power
✅ The correct answer is option C.