naphtha.
cracked gases rich in C2 & C4 olefins.
low boiling aromatics.
none of these.
✅ The correct answer is option B.
Chemical Engineering MCQs
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
5-Oct
30-80
150-250
350-400
✅ The correct answer is option B.
Higher vapour pressure of gasoline indicates
low flash point
high breathing loss
both (a) and (b)
neither (a) nor (b)
✅ The correct answer is option D.
Pyrolysis of kerosene or natural gasoline is done to produce mainly the
olefins and aromatics
lighter paraffins
stabilised gasoline
diesel
✅ The correct answer is option A.
Percentage of straight run gasoline in a typical crude oil may be around
6
18
38
52
✅ The correct answer is option D.
Which of the following has the highest flash point of all ?
Diesel
Kerosene
Petrol
Furnace oil
✅ The correct answer is option D.
Tetra-ethyl lead is added in gasoline to
increase its smoke point.
reduce gum formation.
reduce the pour point.
increase its octane number.
✅ The correct answer is option D.
Aniline point of the diesel is a measure of its __________ content.
aromatic
paraffin
olefin
naphthene
✅ The correct answer is option A.
Cetane number of alpha methyl naphthalene is assumed to be
0
100
50
∞
✅ The correct answer is option A.
Which of the following has the minimum °API gravity of all?
Diesel
Kerosene
Petrol
Furnace oil
✅ The correct answer is option D.