asphalt
sulphur compounds
wax
nitrogen compounds
✅ The correct answer is option B.
Engineering
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2822. A multigrade lubricating oil means an oil having high
viscosity index
viscosity
aniline point
flash point
✅ The correct answer is option A.
2823. Reforming converts
olefins into paraffins
naphthenes into aromatics
naphthenes into olefins.
naphthenes into paraffin.
✅ The correct answer is option B.
2824. Octane number (unleaded) of gasoline produced by isomerisation of butane may be about
45
55
70
90
✅ The correct answer is option C.
2825. Feedstock for polymerisation is
naphtha.
cracked gases rich in C2 & C4 olefins.
low boiling aromatics.
none of these.
✅ The correct answer is option B.
2826. 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.
2827. 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.
2828. 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.
2829. Percentage of straight run gasoline in a typical crude oil may be around
6
18
38
52
✅ The correct answer is option D.
2830. Which of the following has the highest flash point of all ?
Diesel
Kerosene
Petrol
Furnace oil
✅ The correct answer is option D.