@⇒ Water treatment ⇒ Biochemical Engineering ⇒ Medical Science Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, short cut notes, rapid fire notes, best theory

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Q1.	Temporary hardness of water is caused by the presence of
A.	chlorides of calcium and magnesium [Wrong Answer]
B.	sulfates of calcium and magnesium [Wrong Answer]
C.	bicarbonates of calcium and magnesium [Correct Answer]
D.	carbonates of sodium and potassium [Wrong Answer]
View Answer 4 -4 Explanation:- Answer : C Discuss it below : Click here for more comments


Q2.	The common methods used for disinfection in waste water treatment plants are
A.	chlorination [Wrong Answer]
B.	UV light [Wrong Answer]
C.	both (a) and (b) [Correct Answer]
D.	Phenolic solvent [Wrong Answer]
View Answer 3 -2 Explanation:- Answer : C Discuss it below : Click here for more comments


Q3.	Both temporary and permanent hardness of water can be removed on boiling water with
A.	calcium hydroxide [Wrong Answer]
B.	sodium carbonate [Correct Answer]
C.	calcium oxide [Wrong Answer]
D.	calcium carbonate [Wrong Answer]
View Answer 3 -4 Explanation:- Answer : B Discuss it below : Click here for more comments


Q4.	Coliform bacteria in water is an indication of the presence of
A.	radioactive wastes [Wrong Answer]
B.	excess fertilizer [Wrong Answer]
C.	decaying animals and plants [Wrong Answer]
D.	human feces [Correct Answer]
View Answer 2 -3 Explanation:- Answer : D Discuss it below : Click here for more comments


Q5.	Permanent hard water may be softened by passing it through
A.	sodium silicate [Wrong Answer]
B.	sodium bicarbonate [Wrong Answer]
C.	sodium hexametaphosphate [Correct Answer]
D.	sodium phosphate [Wrong Answer]
View Answer 6 -6 Explanation:- Answer : C Discuss it below : Click here for more comments

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