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Environmental Engineering

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

270000 m³
100000 m³
150000 m³
180000 m³

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Environmental Engineering
Generally the detention period for grit chambers is kept as

24 hours
1 minute
12 hours
5 minutes

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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
The overflow rate for plain sedimentation tanks is about

1000 to 1250 liters/hour/ m²
500 to 750 liters/hour/ m²
1250 to 1500 liters/hour/m²
1500 to 2000 liters/hour/m²

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Environmental Engineering
The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about

0.01 to 0.05 ppm
0.5 to 1.0 ppm
1.0 to 5.0 ppm
0.05 to 0.5 ppm

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Environmental Engineering
In chlorination, with the rise in temperature of water, death rate of bacteria

None of these
Increases
Decreases
Remains unaffected

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MORE MCQ ON Environmental Engineering

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