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Environmental Engineering

Environmental Engineering
Period of cleaning of slow sand filters is about

24 - 48 hours
2 - 3 months
1 - 2 year
10 - 12 days

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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 ratio of 5 day BOD to ultimate BOD is about

43894
43864
43833
1

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Environmental Engineering
A pipe which is installed in the house drainage to preserve the water seal of traps is called

Waste pipe
Soil pipe
Vent pipe
Anti-siphonage pipe

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

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

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

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

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MORE MCQ ON Environmental Engineering

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