The Activated Sludge Process

question 23

Multiple Choice

The activated sludge process

• A) is used during secondary treatment of sewage.
• B) is meant to convert inorganic to organic matter.
• C) is meant to increase the BOD.
• D) removes large objects from the sewage.
• E) is meant to convert inorganic to organic matter AND is meant to increase the BOD.

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Definitions:

Planned Aggregate Expenditure

The total amount households, businesses, and the government plan to spend on goods and services at different levels of national income.

Production

The process of combining various material inputs and immaterial inputs (plans, know-how) to make something for consumption (the output).

Inventories

Goods and materials that a business holds for the purpose of sale or production in the future.

Autonomous Investment

Investment that is not influenced by the current level of income or production, often driven by technological innovations or changes in policy.