Residual Chlorine Must Be Maintained in

question 35

Multiple Choice

Residual chlorine must be maintained in

• A) Anaerobic sludge digestion
• B) Primary sewage treatment
• C) Secondary sewage treatment
• D) Tertiary sewage treatment
• E) Water treatment

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Definitions:

Productive Efficiency

A state where goods and services are produced at the lowest possible cost and resources are utilized in the most efficient way.

Economies of Scale

The cost advantages that enterprises obtain due to their scale of operation, with cost per unit of output decreasing with increasing scale.

Essential Raw Materials

Fundamental inputs necessary for the production of goods, often considered critical for a country's economy and security.

Patents

Legal rights granted by the government to inventors, giving them exclusive rights to their inventions for a certain period of time.