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Environmental Engineering

Environmental Engineering
The velocity of flow of water in a sedimentation tank is about

5 to 10 cm/sec
15 to 30 cm/sec
15 to 30 cm/hour
15 to 30 cm/minute

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Environmental Engineering
The distribution mains are designed for

Maximum daily demand
Maximum hourly demand on maximum day
Average daily demand
Maximum hourly demand

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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

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

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

12 hours
5 minutes
1 minute
24 hours

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Environmental Engineering
The self cleansing velocity for all sewers in India is usually

3.0 m/sec to 3.5 m/sec
Less than 1.0 m/sec
1.5 m/sec to 2.0 m/sec
1.0 m/sec to 1.2 m/sec

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Environmental Engineering
The maximum discharge of a tube well is about

5 liters/sec
1000 liters/sec
50 liters/sec
500 liters/sec

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MORE MCQ ON Environmental Engineering

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