Which of the Following Statements About Fire Fighting Foams Is

question 81

Multiple Choice

Which of the following statements about fire fighting foams is MOST accurate?

• A) Proper aeration produces bubbles in a variety of sizes.
• B) Air is added to the foam solution by chemical reaction.
• C) Air is added to the foam solution by mechanical agitation.
• D) When foam bubbles dissipate, no foam remains on the surface of the fuel.

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Definitions:

Average Cost Curve

A graphical representation showing the average cost of production at different levels of output.

Production Function

A mathematical model describing the relation between input quantities and their respective outputs.

Marginal Products

A new definition for the additional units of output gained by employing one more unit of a specific input, keeping all other inputs constant.

Law of Diminishing Returns

An economic principle stating that as investment in a particular area increases, the rate of profit from that investment, after a certain point, cannot continue to increase if other inputs remain the same.