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Environmental Engineering

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 minimum dissolved oxygen which should always be present in water in order to save the aquatic life is

4 ppm
10 ppm
1 ppm
40 ppm

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Environmental Engineering
For normal sludge, the value of sludge index for Indian conditions is

350 to 500
0 to 50
150 to 350
50 to 150

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

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

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Environmental Engineering
The treatment of water with bleaching powder is known as

Hypo-chlorination
Pre-chlorination
Super chlorination
De-chlorination

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Environmental Engineering
Corrosion in concrete sewers is caused by

Nitrogen
Dissolved oxygen
Chlorine
Septic conditions

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MORE MCQ ON Environmental Engineering

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