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Environmental Engineering

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

Soil pipe
Vent pipe
Waste pipe
Anti-siphonage pipe

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Environmental Engineering
The working conditions in imhoff tanks are

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

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Environmental Engineering
The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is

Hardy cross method
Electrical analysis method
Equivalent pipe method
Circle method

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Environmental Engineering
Disinfection efficiency is

Increased at higher pH value of water
Reduced at higher pH value of water
Highest at pH value equal to 7
Unaffected by pH value of water

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Environmental Engineering
The minimum and maximum diameters of sewers shall preferably be

60 cm and 300 cm
15 cm and 300 cm
15 cm and 100 cm
30 cm and 450 cm

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Environmental Engineering
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by

BOD > COD > TOD
TOD > COD > BOD
TOD > BOD > COD
COD > BOD > TOD

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