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Environmental Engineering

Environmental Engineering
Dissolved oxygen in streams is

Same throughout the day
Maximum at noon
Minimum at noon
Maximum at midnight

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

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

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Environmental Engineering
The rate of Alteration of pressure filters is

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

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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
Electrical analysis method
Circle method
Equivalent pipe method

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Environmental Engineering
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

400 ppm
200 ppm
300 ppm
100 ppm

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Environmental Engineering
Activated carbon is used for

Removing hardness
Removing corrosiveness
Disinfection
Removing odours

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MORE MCQ ON Environmental Engineering

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