2891. Petroleum coke is commercially produced by the __________ process.
hydrocracking
visbreaking
fluid catalytic cracking
delayed coking
✅ The correct answer is option D.
Chemical Engineering
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2892. Clay treatment is used to remove
salt from the crude oil.
colour & dissolved gases from cracked gasoline.
wax from lube oil.
none of these.
✅ The correct answer is option B.
2893. Mercapsol and Unisol processes are meant for the
dearomatisation of kerosene
removal of mercaptans
dewaxing
decoloration
✅ The correct answer is option B.
2894. Pick out the additive property of a lube oil out of following.
°API gravity
Specific gravity
Viscosity
Flashpoint
✅ The correct answer is option A.
2895. Which of the following has maximum hydrogen/carbon ratio (by weight) ?
Naphtha
Gasoline
Diesel
Fuel oil
✅ The correct answer is option B.
2896. LSHS is a type of furnace oil, which
is more viscous than high viscosity furnace oil (HVFO).
stands for low sulphur heavy stock.
is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%).
all (a), (b) and (c).
✅ The correct answer is option D.
2897. Choose the correct statement.
Octane number of i-octane is zero.
Octane number of paraffins increases with increasing number of carbon atoms.
Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms.
The aromatics have lower octane number than naphthenes with same number of carbon atoms.
✅ The correct answer is option C.
2898. Aromatics are desired constituents of
lubricating oil
diesel
kerosene
petrol
✅ The correct answer is option D.
2899. Reforming
uses naphtha as feedstock.
does not much affect the molecular weight of the feed.
improves the quality & yield of gasoline.
all (a), (b) and (c).
✅ The correct answer is option D.
2900. Which of the following factors does not govern the mechanism of petroleum formation from organic sources ?
pH of the soil
Bacterial action
Heat
Pressure
✅ The correct answer is option A.