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Environmental Engineering

Environmental Engineering
For normal sludge, the value of sludge index for Indian conditions is

0 to 50
50 to 150
150 to 350
350 to 500

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Environmental Engineering
The maximum permissible limit for fluoride in drinking water is

10 mg/liter
1.5 mg/liter
0.1 mg/liter
5 mg/liter

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Environmental Engineering
Alkalinity in water is expressed as milligrams per litre in terms of equivalent

Sodium carbonate
Calcium carbonate
Calcium hydroxide
Magnesium carbonate

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Environmental Engineering
The rate of Alteration of pressure filters is

Greater than that of rapid sand filters
Less than that of slow sand filters
Equal to that of slow sand filters
In between the filtration rate of slow sand filters and rapid sand filters

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Environmental Engineering
Standard BOD is measured at

30°C - 5 day
25°C - 3 day
20°C - 5 day
20°C - 1 day

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

3
5
4
2

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MORE MCQ ON Environmental Engineering

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