Petroleum Refinery Engineering
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

Elimination of solvent drying facility
Lower solvent dilution ratio
Higher nitration temperature
All of these

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Petroleum Refinery Engineering
Choose the correct statement regarding thermal cracking.

Greater depth of cracking gives lower octane number gasoline
At low pressure, the yield of lighter hydrocarbons are more
Moderate changes in operating temperature does not change the depth of cracking
Increased residence time results in the decreased severity of cracking

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