Coking
Visbreaking
Pyrolysis
None of these
✅ The correct answer is option D.
Engineering
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2882. Penetration test determines the __________ of the grease.
stiffness
lubricating properties (e.g. oilness)
service temperature
variation in viscosity with temperature
✅ The correct answer is option A.
2883. Both asphalt and wax are produced by __________ base crude oils.
naphthenic
asphalt
paraffin
mixed
✅ The correct answer is option D.
2884. Operating condition in the electrical dehydrators for crude oil is about
6.5 kgf/Cm2 & 95°C.
1 atm. & 110 °C.
20 kgf/cm2 & 110°C.
50 atm. and 150°C.
✅ The correct answer is option A.
2885. Specific gravity of a petroleum product gives an indication of its
degree of refinement.
hydrocarbon content type (aromatic or paraffinic).
ease of atomisation.
sulphur content.
✅ The correct answer is option B.
2886. Catalyst used in catalytic polymerisation which produces polymer gasoline is
H2SO4
H3PO4
both (a) and (b)
AlCl3
✅ The correct answer is option C.
2887. Which of the following is the most widely used cracking process in oil refineries ?
Dubbs process.
T.C.C. moving bed process.
Fluidised bed catalytic cracking process.
Houdry’s fixed bed process.
✅ The correct answer is option C.
2888. Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.
waxes
mercaptans
asphalt
diolefins
✅ The correct answer is option B.
2889. Illuminating characteristics of kerosene is expressed by its
smoke point
aniline point
luminosity number
aromatic content
✅ The correct answer is option C.
2890. __________ converts n-paraffins to i-paraffins.
Alkylation
Polymerisation
Isomerisation
none of these
✅ The correct answer is option C.