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Environmental Engineering

Environmental Engineering
The characteristics of fresh and septic sewage respectively are

Both alkaline
Both acidic
Acidic and alkaline
Alkaline and acidic

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Environmental Engineering
The chemical most commonly used to increase speed of sedimentation of sewage is

Sulphuric acid
Copper sulphate
Lime
Sodium permanganate

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Environmental Engineering
Which of the following values of pH represents a stronger acid?

4
3
2
5

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Environmental Engineering
If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test

Both (i) and (ii)
Only (i)
Both (i) and (iii)
All (i), (ii) and (iii)

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Environmental Engineering
The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is

Hardy cross method
Circle method
Equivalent pipe method
Electrical analysis method

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Environmental Engineering
The percentage of chlorine in fresh bleaching powder is about

40 to 50
30 to 35
20 to 25
10 to 15

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