Petroleum Engineering Question:

Aromatics are desired constituents of

A. lubricating oil
B. diesel
C. kerosene
D. petrol

Option D

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Tetra-ethyl lead is added in gasoline to A. increase its smoke point. B. reduce gum formation. C. reduce the pour point. D. increase its octane number.	Crude topping column operates at __________ pressure. A. atmospheric B. 10 atm C. vacuum D. 3 atm.