Civil Engineering Questions And Answers :: Environmental Engineering: part2



Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part2 : 1 to 5

Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

1.Alum as a coagulant is found to be most effective when pH range of water is

2 to 4
4 to 6
6 to 8
8 to 10

2.The detention period in coagulation tanks is usually kept as

1 to 2 minutes
30 to 45 minutes
2 to 6 hours
2 to 6 days

3.Air binding phenomena in rapid sand filters occur due to

excessive negative head
mud ball formation
higher turbidity in the effluent
low temperature

4.The chemical most commonly used to increase speed of sedimentation of sewage is

sulphuric acid
copper sulphate
lime
sodium permanganate

5.The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally

less and more
less and less
more and less
more and more

More Environmental Engineering QUESTIONS AND ANSWERS available in next pages

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