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Environmental Engineering

Environmental Engineering
If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is

4000
1000
1,00,000
4,00,000

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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
If the average daily consumption of a city is 100,000 m³, the maximum daily consumption on peak hourly demand will be

180000 m³
150000 m³
100000 m³
270000 m³

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Environmental Engineering
Dissolved oxygen in streams is

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

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Environmental Engineering
Turbidity is measured on

Standard platinum scale
Standard silica scale
Platinum cobalt scale
Standard cobalt scale

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Environmental Engineering
Most suitable section of sewer in separate sewage system is

Standard form of egg shaped sewer
Circular section
Modified egg shaped section
Rectangular section

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