English Reading Comprehension 66

ESL / EFL TOEFL / IELTS Reading Practice - Natural Gas in Oil

The answers to the following reading practice test will appear in the box at the bottom of the page when you click on "Submit Worksheet".

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Natural Gas in Oil

Answer the questions according to the reading

Often the oil contains natural gas. It is dissolved in the oil because of the high pressure deep underground. When the drill penetrates the oil-bearing layer this pressure is released. It provides a tremendous thrust and may be sufficient to bring all the oil to the surface. If the gas pressure is not sufficient a pumping station must be built to bring up the oil. This increases the cost of the drilling operation. In its natural 'crude' state oil consists of a mixture of various substances called hydrocarbons. These substances must be separated according to their densities, and purified. This process is called refining.

1. It is clear in the passage that ----.

A) hydrocarbons are the constituents of natural gas
B) refining is the process of separating natural gas and oil from each other
C) when the oil is brought to the surface, it's in a raw state
D) substances should be separated from natural gas
E) the more the pressure is, the more expenditure is done on drilling

2. Oil ----.

A) is the remnants of the pre-historic plants and animals
B) may be brought to the surface in a natural way
C) contains not only natural gas, but also so me other constituents
D) which is mixed with natural gas is more expensive than the crude one
E) should be distilled at the bottom of the surface

3. It could be drawn out of the passage that ----.

A) natural gas in oil makes it easier to drill
B) refining is the act of keeping oil and natural gas under pressure
C) as soon as the pumping station is founded upon the base, distilling
D) crude oil is mixed with only natural gas
E) natural gas is much cheaper than oil

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Correct answers:
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