271. 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.
Petroleum Refinery Engineering MCQs
272. Pour point and freezing point is equal for
petrol
diesel
water
crude petroleum
✅ The correct answer is option C.
273. Aniline point of high speed diesel may be about __________ °C.
35
70
105
150
✅ The correct answer is option B.
274. 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.
275. Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?
Diesel
Gasoline
Atmospheric gas oil
Vacuum gas oil
✅ The correct answer is option B.
276. 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.
277. A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
8
18
28
35
✅ The correct answer is option A.
278. 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.
279. 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.
280. 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.