81. The best method of determining sulphur in crude oil is by the __________ method.
82. Tetra-ethyl lead is added in gasoline to
83. Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.
84. Cetane number of alpha methyl naphthalene is assumed to be
85. Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of
86. Crude petroleum oil is a __________ fuel.
87. In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen
88. 95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C.
89. Sulphur content in lighter and heavier petroleum products is generally determined respectively by
90. LPG stands for
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