Question

How can we dig out the oil present in the earth’s crust?

(a) By providing some external pressure

(b) By digging the whole area

(c) The oil comes out by itself from pipes

(d) By covering the holes at the top

This question was addressed to me in a job interview.

This interesting question is from Petroleum in chapter Fuels and Combustion of Engineering Chemistry II

Answer 1

Correct option is (c) The oil comes out by itself from pipes

To explain I would say: Holes are drilled into the earth’s crust and pipes are sunk up to the surface of oil-bearing rocks. Oil usually rushes out to the surface by itself because of hydrostatic pressure of natural gas.