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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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Health is the greatest gift, contentment is the greatest wealth -Buddha
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