81
A good lubricant should have high _____________________ ?
Answer: Viscosity index
Questions
82
Name the hydrocarbon having the poorest oxidation stability ?
Answer: Aromatics
83
Phenols are added in gasoline to____________________?
Answer: Act as an antioxidant
84
Paraffin base crude oil as compared to asphalt base crude gives___________________?
Answer: Higher yield of straight run gasoline
85
Flash point of an oil gives an idea of the___________________?
Answer: Nature of boiling point diagram of the system
86
Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about ________________ ppm?
Answer: 50
87
The reservoir rock containing petroleum has_________________?
Answer: Both B. and C.
89
Polymerisation__________________?
Answer: Causes olefins to combine with each other
90
Which of the following constituents present in petroleum is responsible for ash formation ?
Answer: Sulphur compounds
92
Clay treatment of petroleum products __________________?
Answer: All A., B. & C
93
The main reaction in reforming is the _____________________?
Answer: Dehydrogenation of naphthenes
94
Percentage of straight run gasoline in a typical crude oil may be around________________?
Answer: 52
95
Gasoline yield in catalytic reforming of naphtha may be about _________________ percent by weight?
Answer: 85
96
The terminology used for the bottom most product from the vacuum crude distillation unit is______________?
Answer: Residuum
97
Waxes present in petroleum products_________________?
Answer: Crystallise out at low temperature
98
Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________?
Answer: Olefins and aromatics
99
Which of the following is the most important property for a jet fuel ?
Answer: Freezing point
