Which of the Following Is True of Chlorofluorocarbons

question 140

Multiple Choice

Which of the following is true of chlorofluorocarbons?

• A)they can easily be eliminated as they are used for so few manufacturing processes as to be unimportant.
• B)they are used in refrigeration systems,as propellants in spray cans,and to make foam products.
• C)they are used for storing chemicals in large manufacturing facilities.
• D)they are unregulated in developing countries,so do not need to be regulated in North America.
• E)they contribute to small changes in carbon dioxide levels.

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Definitions:

Vocal Dysphagia

Difficulty or discomfort in swallowing, affecting the voice or speech.

Swooshing Sound

An auditory phenomenon often related to the turbulent flow of blood in vessels, sometimes indicating a pathological condition.

Mitral Valve

One of the four valves in the heart, located between the left atrium and left ventricle; it helps regulate blood flow.

Mechanical Prosthetic Valve

An artificial heart valve used to replace a diseased valve to restore normal blood flow through the heart.