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Biochemical Engineering - Water Treatment

Exercise : Water Treatment - Section 1
  • Water Treatment - Section 1
11.
Application of quaternary ammonium compounds as sanitizing agents tends to
favor gram positive bacteria
decrease gram positive bacteria
increase the percentage of gram(-)ve rods on utensils
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Permanent hardness of water is caused by the presence of
bicarbonates of calcium and magnesium
carbonates of sodium and potassium
chlorides and sulfates of calcium and magnesium
phosphates of sodium and potassium
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
According to BIS the maximum permissible limit of dissolved solids in drinking water is
1000 mg/l
500 mg/l
2000 mg/l
1500 mg/l
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Acid used mostly for removal of milk stone is
phosphoric acid
nitric acid
gluconic acid
tartaric acid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following chemical is sometime added in the process of coagulation and flocculation?
Aluminum sulphate
Aluminum oxide
Calcium chloride
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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