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Environmental Engineering

Environmental Engineering
A sewer that receives the discharge of a number of house sewers is called

House sewer
Sub-main sewer
Lateral sewer
Intercepting sewer

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Environmental Engineering
The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called

Waste pipe
Soil pipe
Anti-siphonage pipe
Vent pipe

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Environmental Engineering
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as

8.5 to 10.0
6.5 to 8.0
4.5 to 6.0
10.5 to 12.0

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Environmental Engineering
The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water

Both (i) and (ii)
Only (i)
Only (iii)
Both (i) and (iii)

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Environmental Engineering
For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be

Partially separate system
Separate system
Partially combined system
Combined system

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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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MORE MCQ ON Environmental Engineering

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