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Environmental Engineering MCQ Questions & Answers | Civil Engineering

Learn Environmental Engineering MCQ questions & answers are available for a Civil Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Environmental Engineering MCQ question is the important chapter for a Civil Engineering and GATE students. Page-4 section-1

Each section contains 100 MCQs on Environmental Engineering .
31
The gas from sludge digestion tank is mainly composed of
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Answer & Solution
Answer: Option D
Solution:
The gas from a sludge digestion tank is primarily composed of Methane. Sludge digestion is a process in environmental engineering where organic matter in sewage sludge is decomposed by microorganisms in an anaerobic environment, producing biogas as a byproduct. Biogas is mainly composed of methane, along with smaller amounts of carbon dioxide and traces of other gases such as hydrogen sulfide and nitrogen.
32
The maximum efficiency of BOD removal is achieved in
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
33
The minimum and maximum diameters of sewers shall preferably be
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
34
The biochemical treatment of sewage effluents is essentially a process of
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
35
Sewerage system is usually designed for
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
36
Sewage treatment units are normally designed for
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
37
Generally the detention period for grit chambers is kept as
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
38
Activated carbon is used for
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Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
39
The polluted water is one which
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
40
In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be
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Answer & Solution
Answer: Option B
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