Environmental Engineering QUESTIONS AND ANSWERS

Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part2 : 21 to 25

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

21.The rate of filtration in slow sand filters in million litres per day per hectare is about

50 to 60

100 to 150

500 to 600

1400 to 1500

22.The overflow rate for plain sedimentation tanks is about

500 to 750 litres/hour/ m2

1000 to 1250 litres/hour/ m2

1250 to 1500 litres/hour/m2

1500 to 2000 litres/hour/m2

23.Orthotolidine test is used for determination of

dissolved oxygen

residual chlorine

biochemical oxygen demand

dose of coagulant

24.The velocity of flow of water in a sedimentation tank is about

5 to 10 cm/sec.

15 to 30 cm/sec.

15 to 30 cm/minute

15 to 30 cm/hour

25.On standard silica scale, the turbidity in drinking water should be limited to

10 ppm

20 ppm

30 ppm

50 ppm

More Environmental Engineering QUESTIONS AND ANSWERS available in next pages

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