单项选择题

Which of the following is NOT true

A．Crude oil is found below land and water.
B．Crude oil is always found a few hundred feet below the surface.
C．Pumping and pressure force crude oil to the surface.
D．A variety of petroleum products is obtained from crude oil.

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单项选择题

How is crude oil brought to the surface

A．By expansion of the hydrocarbons.
B．By pressure and pumping.
C．By vacuum created in the drilling pipe.
D．By expansion and contraction of the earth's surface.

单项选择题

Which of the following is TRUE

A．The various petroleum products are produced by filtration.
B．Heating and condensation produce the various products.
C．Chemical separation is used to produce the various products.
D．Mechanical means such as the centrifuge are used to produce the various products.