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Civil Set-1
Environmental Engineering
127

Environmental Engineering MCQ with Answers

127) If the sewage contains grease and fatty oils, these are removed in

grit chambers

detritus tanks

skimming tanks

sedimentation tanks

Answer is:

skimming tanks

Environmental Engineering MCQ with Answers

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Related Environmental Engineering MCQ with Answers

128) Generally the detention period for grit chambers is kept as

1 minute

5 minutes

2-4 hours

12 hours

Answer is:

1 minute

129) Which of the following unit works in anaerobic conditions?

sludge digestion tank

sedimentation tank

activated sludge treatment

trickling filters

Answer is:

sludge digestion tank

130) Septic tank is a i) settling tank ii) digestion tank iii) aeration tank The correct answer is

only (i)

(i) and (ii)

(i) and (iii)

only (iii)

Answer is:

(i) and (ii)

131) The maximum efficiency of BOD removal is achieved in

oxidation pond

oxidation ditch

aerated lagoons

trickling filters

Answer is:

oxidation ditch

Environmental Engineering MCQ with Answers

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