2973. Paraffins are desirable in lubricating oil, as it has got high
viscosity
viscosity index
smoke point
pour point
✅ The correct answer is option C.
2979. Stabilisation of gasoline (petrol) means
removal of dissolved gases from it.
increasing its oxidation stability.
improving its lead susceptibility.
increasing its vapour pressure.
✅ The correct answer is option A.
2984. Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of
propane & butane
butane & ethane
methane & ethane
methane & carbon monoxide
✅ The correct answer is option A.
2949. A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent.
4
10
18
26
✅ The correct answer is option B.
2953. Maximum use of petroleum coke is in
adsorption refining operation.
fuel gas manufacture.
carbon electrode manufacture.
iron ore reduction.
✅ The correct answer is option C.
2958. Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline.
polymer
unleaded
casing head
straight run
✅ The correct answer is option B.
2964. Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the
elimination of solvent drying facility.
higher nitration temperature.
lower solvent dilution ratio.
all (a), (b) & (c).
✅ The correct answer is option D.
2969. Removal of light fractions from crude oil is called its
sweetening
dehydration
stabilisation
visbreaking
✅ The correct answer is option C.
2974. Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint.
black
white
red
yellow
✅ The correct answer is option B.
2980. Carbon/hydrogen ratio (by weight) is maximum (out of following) for
gasoline
kerosene
light gas oil
heavy fuel oil
✅ The correct answer is option A.