Biochemical Engineering Questions and Answers
A set of questions and answers to test and improve your knowledge and understanding of Biochemical Engineering.
A set of questions and answers to test and improve your knowledge and understanding of Biochemical Engineering.
Which of the following chemical is sometimes added in the process of coagulation and flocculation?
Aluminum sulphate
Aluminum oxide
Calcium chloride
None of these
Correct answer is A
No explanation has been provided for this answer.
Acid used mostly for removal of milk stone is
phosphoric acid
nitric acid
gluconic acid
tartaric acid
Correct answer is B
No explanation has been provided for this answer.
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
Correct answer is C
No explanation has been provided for this answer.
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
Correct answer is C
No explanation has been provided for this answer.
Secondary treatment uses __________ to consume wastes.
micro-organisms
chemicals
filtration
none of these
Correct answer is A
No explanation has been provided for this answer.
Temporary hardness of water is caused by the presence of
chlorides of calcium and magnesium
sulfates of calcium and magnesium
bicarbonates of calcium and magnesium
carbonates of sodium and potassium
Correct answer is C
No explanation has been provided for this answer.
Permanent hard water may be softened by passing it through
sodium silicate
sodium bicarbonate
sodium hexametaphosphate
sodium phosphate
Correct answer is C
No explanation has been provided for this answer.
The chemical oxygen demand (COD) measures the
amount of oxygen required for growth of microorganisms in water
amount of oxygen that would be removed from the water in order to oxidize pollution
amount of oxygen required to oxidize the calcium present in waste water
none of the above
Correct answer is B
No explanation has been provided for this answer.
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