76. 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
77. Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.
78. Sulphur content in lighter and heavier petroleum products is generally determined respectively by
79. Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely mis-cible. It means that the aniline point of the diesel is __________ the room temperature.
80. Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its
81. Catalyst used in catalytic polymerisation which produces polymer gasoline is
82. Butadiene is a/an
83. Antioxidants are added in petrol to
84. Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline.
85. Which of the following categories of gasoline has the highest lead susceptibility ?
86. Gum formation in stored gasoline is mainly due to the
87. Flash point of an oil is determined by the
88. Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic
89. During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water.
90. Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to
91. Which of the following has the highest gum forming tendency in gosoline ?
92. Higher viscosity of lubricating oil usually signifies
93. Aniline point test of an oil qualitatively indicates the __________ content of an oil.
94. Which of the following processes in oil refinery does not employ 'cracking' ?
95. Bottom product of atmospheric pressure crude oil distillation column is termed as
96. Which of the following is used as a solvent in deasphalting of petroleum products ?
97. Penetration test determines the __________ of the grease.
98. The reservoir rock containing petroleum has
99. Fuel oil is subjected to visbreaking to reduce its
100. Which is the most desirable component of a good quality kerosene ?