Environmental Engineering QUESTIONS AND ANSWERS

Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part6 : 6 to 10

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

6.The maximum efficiency of BOD removal is achieved in

oxidation pond

oxidation ditch

aerated lagoons

trickling filters

7.For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as

4.5 to 6.0

6.5 to 8.0

8.5 to 10.0

10.5 to 12.0

8.The main disadvantage of oxidation pond is that

large area is required for construction

maintenance and operation cost are high

BOD removal is very low

none of the above

9.The working conditions in imhoff tanks are

aerobic only

anaerobic only

aerobic in lower compartment and anaerobic in upper compartment

anaerobic in lower compartment and aerobic in upper compartment

10.Most of the bacteria in sewage are

parasitic

saprophytic

pathogenic

anaerobic

More Environmental Engineering QUESTIONS AND ANSWERS available in next pages

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