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Environmental Engineering

Environmental Engineering
Sewerage system is usually designed for

28 years
27 years
25 years
26 years

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Environmental Engineering
The working conditions in imhoff tanks are

anaerobic in lower compartment and aerobic in upper compartment
Aerobic in lower compartment and anaerobic in upper compartment
Anaerobic only
Aerobic only

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Environmental Engineering
The type of valve, which is provided on the suction pipe in a tube-well, is

Sluice valve
Pressure relief valve
Air relief valve
Reflux valve

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Environmental Engineering
The type of sewer which is suitable for both combined and separate system is

Egg shaped sewer
Horseshoe type sewer
Circular sewer
Semi-elliptical sewer

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Environmental Engineering
The overflow rate for plain sedimentation tanks is about

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

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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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