CO (upto 65%) & CO₂
CO₂ & H₂
CO & O₂
CO₂ & O₂
✅ The correct answer is option A.
Chemical Engineering MCQs
Naphthalene recovered from coke oven gas is used
As moisture proof coating on fibres
As moth balls (insecticides)
As a fuel in furnaces
For making electrodes
✅ The correct answer is option B.
Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has
Higher calorific value
Lower hydrogen content
Both A & B
Neither A nor B
✅ The correct answer is option D.
Coal tar (produced by high temperature carbonisation) is the main source of
Aromatic compounds
Alphatic compounds
Paraffins
Olefins
✅ The correct answer is option A.
Abel apparatus is used for those oils, whose flash points are___°F.
<120
>120
>280
300-600
✅ The correct answer is option A.
The gas which contributes maximum to the heating value of natural gas is
CO
CO₂
H₂
CH₄
✅ The correct answer is option D.
__________ has the widest inflammability limit (explosion limit) of all the gases.
Hydrogen
Carbon monoxide
Acetylene
Methane
✅ The correct answer is option C.
Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.
500
750
950
1100
✅ The correct answer is option B.
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.
Decreases
Increases
Remains same
May increase or decrease depending on the type of fuel
✅ The correct answer is option B.
Which of the following fuel gases is heavier than air?
Blast furnace gas
Coke oven gas
Natural gas
Water gas
✅ The correct answer is option A.