2879. Isomerisation converts the __________ tot-paraffins.
paraffins
olefins
naphthenes
none of these
✅ 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.
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.
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.
2895. Which of the following has maximum hydrogen/carbon ratio (by weight) ?
Naphtha
Gasoline
Diesel
Fuel oil
✅ The correct answer is option B.
2901. Pour point and freezing point is equal for
petrol
diesel
water
crude petroleum
✅ The correct answer is option C.
2907. Water separometer index (modified) (WSIM) of a petrofuel is the measure of its
emulsification tendency.
water separation characteristics.
water content.
water absorbing capacity from atmosphere.
✅ The correct answer is option B.
2876. Reid vapour pressure of gasoline is the measure of its
pour point
cloud point
vapour locking tendency
carbon residue
✅ The correct answer is option C.
2880. Concentration of H2SO4 catalyst in alkyla-tion is kept between 90-98%, because H2SO4 having concentration
less than 90% promotes polymerisation.
more than 98% promotes cracking.
both (a) and (b).
neither (a) nor (b).
✅ The correct answer is option C.
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.