Decreases the dew point
Increases the dew point
Reduces the combustion efficiency by limiting the permissible temperature reduction
Both B & C
✅ The correct answer is option D.
Chemical Engineering MCQs
Percentage of methane in coke oven gas may be around
5
15
25
50
✅ The correct answer is option C.
The pyragallol solution used in orsat apparatus can absorb
Only O₂
Both O₂ and CO₂
Both O₂ and CO
All of the above
✅ The correct answer is option B.
Which of the following is a primary fuel?
Blast furnace coke
Gasoline
Natural gas
Wood charcoal
✅ The correct answer is option C.
Volatile matter content in coking coal may be about __________ percent.
1
7
22
46
✅ The correct answer is option C.
Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.
H₂O
CO₂
CO
CH₄
✅ The correct answer is option C.
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.
1100
1250
1350
1400
✅ The correct answer is option A.
A sample of natural gas containing 80% methane (CH₄) and rest nitrogen (N₂) is burnt with 20% excess air. With 80% of the combustibles producing CO₂ and the reminder going to CO, the Orsat analysis in volume percent is
CO₂ : 6.26, CO : 1.56, O₂ : 3.91, H₂O :15.66, N₂ : 72.60
CO₂ : 7.42, CO : 1.86, O₂ : 4.64, N₂:86.02
CO₂ : 6.39, CO : 1.60, O₂ : 3.99, H₂O:25.96, N₂:72.06
CO₂ : 7.60, CO : 1.90, O₂ : 4.75, N₂ : 85.74
✅ The correct answer is option B.
A good coking coal should have high __________ content.
Ash
Sulphur & phosphorus
Moisture
None of these
✅ The correct answer is option D.
With increase in moisture content of coal, its
Calorific value increases sometimes
Bulk density always decreases
Clinkering tendency during combustion increases
None of these
✅ The correct answer is option D.