61. Research octane number refers to the
low octane number motor fuels.
high octane number motor fuels.
high octane number aviation fuels.
unleaded motor fuels.
✅ The correct answer is option D.
Petroleum Refinery Engineering MCQs
62. Smoke point of a good burning kerosene may be around __________ mm.
0-5
20-25
60-75
100-120
✅ The correct answer is option B.
63. Octane number of gasoline produced by two stage fluidised catalytic cracking process is
80
87
92
97
✅ The correct answer is option D.
64. Crude petroleum oil is a __________ fuel.
primary
fossil
both (a) & (b)
secondary
✅ The correct answer is option C.
65. 1 centistoke is equal to __________ Redwood I seconds.
1
4.08
0.408
40.8
✅ The correct answer is option B.
66. __________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
Acid
Solvent extraction
Alkali
Clay
✅ The correct answer is option B.
67. Feedstock for the production of biodiesel is
herbal plants
used vegetable oils
LSHS
bagasse
✅ The correct answer is option B.
68. Flash point of an oil gives an idea of the
nature of boiling point diagram of the system.
amount of low boiling fraction present.
explosion hazards.
all (a), (b) and (c).
✅ The correct answer is option D.
69. Solvent used in the deasphalting process is
furfurol
phenol
propane
hexane
✅ The correct answer is option C.
70. The doctor’s solution comprises of sodium plumbite in
alcohal
water
aqueous caustic soda
soda ash
✅ The correct answer is option C.