Petroleum Refinery Engineering
Petroleum deposits are detected by the.

Age & nature of rocks inside the crust of the earth
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

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Petroleum Refinery Engineering
Asphalts are

Desirable in catalytic cracking feedstock, because they produce coke
All of these
Readily oxidisable and form carbonaceous sludge
. Low molecular weight & low boiling point compounds present in petroleum

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