2827. Higher vapour pressure of gasoline indicates
low flash point
high breathing loss
both (a) and (b)
neither (a) nor (b)
✅ The correct answer is option D.
2831. Tetra-ethyl lead is added in gasoline to
increase its smoke point.
reduce gum formation.
reduce the pour point.
increase its octane number.
✅ The correct answer is option D.
2806. Asphalts are
low molecular weight & low boiling point compounds present in petroleum.
desirable in catalytic cracking feedstock, because they produce coke.
readily oxidisable and form carbonaceous sludge.
all (a), (b) & (c).
✅ The correct answer is option C.
2810. Which of the following has the lowest flash point of all?
Diesel
Kerosene
Petrol
Furnace oil
✅ The correct answer is option C.
2815. Which of the followingis desirable in petrol (gasoline) but undesirable in kerosene ?
Paraffins
Aromatics
Mercaptans
Naphthenic acid
✅ The correct answer is option C.
2820. Cetane number of a diesel fuel is the measure of its
ignition delay
smoke point
viscosity
oxidation stability
✅ The correct answer is option A.
2740. Which of the following has the highest gross calorific value?
Blast furnace gas
Coke oven gas
Carburetted water gas
Oil refinery gas
✅ The correct answer is option D.
2745. A petroleum well is called ‘dry’, if it contains
very little oil.
no natural gas.
only natural gas.
all (a), (b) and (c).
✅ The correct answer is option C.
2750. Name the endothermic reaction out of the following:
Catalytic cracking.
Hydrocracking.
Dehydrogeneration of naphthene to produce aromatic.
Catalytic polymerisation.
✅ The correct answer is option C.