Biochemical Engineering - Water Treatment

Exercise :: Water Treatment - Section 1

  • Water Treatment - Section 1
31. 

From the following sanitizers which one comes under category of surface active agents?

A. Tetra phosphate
B. Teepol
C. Meta phosphate
D. None of these

Answer: Option B

Explanation:

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32. 

The purest form of naturally occurring water is

A. rain water
B. river water
C. pond water
D. well water

Answer: Option A

Explanation:

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33. 

Calgon is used for removal of

A. sodium carbonate
B. permanent hardness of water
C. potassium carbonate
D. none of these

Answer: Option B

Explanation:

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34. 

The water being used in dairy industry should contain not more than

A. 5 proteolytic and/or lipolytic organisms per ml
B. 10 proteolytic and/or lipolytic organisms per ml
C. 15 proteolytic and/or lipolytic organisms per ml
D. 20 proteolytic and/or lipolytic organisms/ml

Answer: Option A

Explanation:

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35. 

The activated sludge process consists of returning a portion of the clarifier

A. effluent water entering the reactor
B. influent water coming out of the reactor
C. influent water entering the reactor
D. effluent water coming out of the reactor

Answer: Option C

Explanation:

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