41. Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds).
5
25
50
100
✅ The correct answer is option B.
Petroleum Refinery Engineering MCQs
42. The characterisation factor of crude petroleum oil is around
3
11
22
28
✅ The correct answer is option B.
43. Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is
propane.
diethylene glycol.
aqueous solution (10% water) of diethylene glycol.
methyl ethyl ketone (MEK).
✅ The correct answer is option C.
44. Pick out the correct statement about catalytic polymerisation.
H2SO4 polymerisation process gives gasoline rich in unsaturates.
In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive.
both (a) and (b)
neither (a) nor (b)
✅ The correct answer is option B.
45. Deoiling of wax is done by its
heating
cooling
solvent extraction
both(b)&(c)
✅ The correct answer is option D.
46. Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm.
n-paraffins
olefins
aromatics
none of these
✅ The correct answer is option C.
47. The proper arrangement of the petroleum fractions in order of their boiling points is
lubricating oil > diesel > petrol > LPG
lubricating oil > petrol > diesel > LPG
petrol > lubricating oil > diesel > LPG
petrol > diesel > LPG > lubricating oil
✅ The correct answer is option A.
48. Octane number (unleaded) of reformed gasoline may be upto
60
70
80
90
✅ The correct answer is option D.
49. Which of the following fractions of petroleum contains maximum sulphur ?
Diesel
Gasoline
Naphtha
Atmospheric residue
✅ The correct answer is option D.
50. Flash point of an oil is determined by the
Pensky Martens apparatus.
Ramsbottom apparatus.
Saybolt viscometer.
Conradson apparatus.
✅ The correct answer is option A.