1
15
50
100
✅ The correct answer is option B.
Engineering
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2922. 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.
2923. About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.
2
3
5
1
✅ The correct answer is option C.
2924. 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.
2925. Cannel coal and boghead coal are the examples of
Humic coals
Liptobiolites
Sapropelic coals
None of these
✅ The correct answer is option C.
2926. 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.
2927. 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.
2928. Compound coke ovens are those which can be heated by
Both steam and electrical power
Lean gas (e.g., B.F. gas)
Rich gas (e.g., coke oven gas)
Both B and C
✅ The correct answer is option D.
2929. 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.
2930. 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.