2426. Aniline point is the
characteristic property of diesel & lubricating oils.
measure of aromatic content of oil.
both (a) and (b).
neither (a) nor (b).
✅ The correct answer is option C.
2434. Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene.
smoke point
paraffins
aromatics
naphthenes
✅ The correct answer is option C.
2439. 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.
2444. 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.
2448. Which of the following fractions of petroleum contains maximum sulphur ?
Diesel
Gasoline
Naphtha
Atmospheric residue
✅ The correct answer is option D.
2417. Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.
electric immersion
pipestill
steam coil
none of these
✅ The correct answer is option B.
2423. Antioxidants are added in petrol to
impart colour to it, for easy identification.
minimise the gum formation.
prevent icing of the carburettor.
prevent the lead build up in engines.
✅ The correct answer is option B.
2429. In catalytic alkylation, higher iso-butane to olefin ratio gives
low final boiling point product
higher yield
both (a) and (b)
neither (a) nor (b)
✅ The correct answer is option A.
2435. Which is the most ideal feed stock for ‘coking’ process used for the manufacture of petroleum coke ?
Naphtha
Vacuum residue
Light gas oil
Diesel
✅ The correct answer is option B.