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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  Environmental Engineering  >  Test: Digestion Of Sludge, Sludge Digestion Tank - Civil Engineering (CE) MCQ

Test: Digestion Of Sludge, Sludge Digestion Tank - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Environmental Engineering - Test: Digestion Of Sludge, Sludge Digestion Tank

Test: Digestion Of Sludge, Sludge Digestion Tank for Civil Engineering (CE) 2024 is part of Environmental Engineering preparation. The Test: Digestion Of Sludge, Sludge Digestion Tank questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Digestion Of Sludge, Sludge Digestion Tank MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Digestion Of Sludge, Sludge Digestion Tank below.
Solutions of Test: Digestion Of Sludge, Sludge Digestion Tank questions in English are available as part of our Environmental Engineering for Civil Engineering (CE) & Test: Digestion Of Sludge, Sludge Digestion Tank solutions in Hindi for Environmental Engineering course. Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free. Attempt Test: Digestion Of Sludge, Sludge Digestion Tank | 10 questions in 25 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Environmental Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
Test: Digestion Of Sludge, Sludge Digestion Tank - Question 1
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How many stages are there in sludge digestion process?

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Explanation: The sludge digestion process consists of acid fermentation, acid regression and alkaline fermentation.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 2
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The form of sludge which is free from pathogenic bacteria is

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Explanation: The digested sludge is free from pathogenic bacteria. It has the behavior of rich humus soil.

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Test: Digestion Of Sludge, Sludge Digestion Tank - Question 3
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 The BOD of supernatant liquor in a sludge digestion process is ____ ppm.

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Explanation: The range of BOD of supernatant liquor in a sludge digestion process is between 2000 and 3000 ppm. It is a form of sludge that is obtained in the sludge digestion process.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 4
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 Which of the following is correct regarding pH in different stages of the sludge digestion process?
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Explanation: The pH value in Alkaline fermentation stage is 7.5 whereas in Acid regression and Acid fermentation stage, the pH>7, having the least in acid fermentation stage.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 5
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 Which of the following is incorrect about aerobic digestion in the sludge digestion process?
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Explanation: The residual energy in aerobic digestion is very less in comparison to anaerobic digestion.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 6
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The color of digestive sludge is
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Explanation: The color of digestive sludge is black. It has an inoffensive odor.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 7
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 Which of the following is correct regarding anaerobic digestion in the sludge digestion process?
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Explanation: Anaerobic digestion is a low energy process which contains low amount of biomass and where both facultative and anaerobic bacteria solubilize the organic matter.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 8
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The maximum temperature at which thermophilic microorganisms remain active in sludge digester is
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Explanation: The maximum and minimum temperature at which thermophilic microorganisms remain active in sludge digester are 60oC and 40oC respectively.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 9
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Which of the following is obtained in the secondary tank in two stage sludge digester?
Detailed Solution for Test: Digestion Of Sludge, Sludge Digestion Tank - Question 9

Explanation: In two stage sludge digester, the partially digested sludge is obtained in primary tank, whereas digested sludge is obtained in the secondary tank along with supernatant liquor.

Test: Digestion Of Sludge, Sludge Digestion Tank - Question 10
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The high rate sludge digestion tanks are used when the capacity of the tank is ____ million liters per day.
Detailed Solution for Test: Digestion Of Sludge, Sludge Digestion Tank - Question 10

Explanation: High rate digesters are used when the capacity of tank is 4 million litres per day. Complete mixing and uniform feeding of raw sludge takes place in high rate digesters.

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