Magnesium
Potassium
Calcium
Sodium
✅ The correct answer is option A.
Chemical Engineering MCQs
In case of liquid petrofuels, momentary combustion is observed at its
flash point.
preheating temperature corresponding to viscosity of 25 centistokes.
flame temperature.
fire point.
✅ The correct answer is option A.
Operating temperature and pressure in catalytic reforming is about
1-5 Kgf/cm2 & 200°C.
15-45 Kgf/cm2 & 450-550°C.
50 – 75 kgf/cm2 & 600 – 800°C.
5-10 kgf/cm2 & 150 – 250°C.
✅ The correct answer is option B.
Aniline point is the temperature at which
equal weight of diesel & the aniline are completely miscible.
equal weight of aniline & the test sample are completely miscible.
equal volume of aniline & the test sample are completely miscible.
aniline vaporises.
✅ The correct answer is option C.
Which is the most desirable component of a good quality kerosene ?
i-paraffins
Aromatics
n-paraffins
Naphthenes
✅ The correct answer is option C.
A gaseous fuel in order to develop luminousity on burning, must contain
Carbon monoxide
Hydrocarbons
Hydrogen
Oxygen
✅ The correct answer is option B.
The weathering index of a coal
Gives an idea of the fusion temperature of ash
Is related to its calorific value
Is a measure of its size stability, when stored & exposed to weather
Is a measure of its caking tendency
✅ The correct answer is option C.
The optimum percentage of excess air for combustion depends upon the __________ of the fuel.
Type (solid, liquid or gaseous)
Calorific value
Sulphur content
Ignition temperature
✅ The correct answer is option A.
Ratio of primary air to secondary air increases with increase in the rank of coal, because the
High rank coals have higher amount of volatile matter
Ratio of fixed carbon to volatile matter increases
Oxygen content progressively decreases
Calorific value of the coal increases
✅ The correct answer is option B.
The main aim of cracking is to produce
gasoline
lube oil
petrolatum
coke
✅ The correct answer is option A.