81. Diesel index.(an alternative index for expressing the quality of diesel) is
82. __________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
83. Smoke point of kerosene is the
84. The colour of gasoline is an indication of its
85. Boiling range of motor gasoline is an indication of the
86. In solutizer sweetening process, solutizer solution used is
87. Higher pressure in the reforming reactor
88. Bottom product of atmospheric pressure crude oil distillation column is termed as
89. For gasoline, the flash point (<50°C) is determined by the
90. Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
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