Petroleum Refinery Engineering
In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction

Heavy distillates
Intermediate distillates
Light ends
Residues

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Petroleum Refinery Engineering
Choose the correct statement regarding thermal cracking.

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

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Petroleum Refinery Engineering
Petroleum deposits are detected by the.

Measuremet of density, elasticity and magnetic & electric properties of the rock in the crust of the earth
All of these
Oil seepage at the surface of the earth
Age & nature of rocks inside the crust of the earth

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