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.Management Sciences
Category: Waste Water Engineering
The maximum depth of sedimentation tanks, is kept__________________?
0
A. 3 m
B. 3.5 m
C. 4 m
D. 4.5 m
Large diameter sewers subjected to external pressure alone, are reinforced ______________________?
A. Near the inner surface of the pipe
B. Near the outer surface of the pipe
C. Both A. and B.
D. With elliptical cage
The settlement of a particle in sedimentation tank, is affected by_____________________?
A. Velocity of flow
B. Viscosity of water
C. Size and shape of solid
D. All the above
For design purposes, the normal rate of infiltration of ground water into the sewer, is___________________?
A. 500 litres/km/cm
B. 1000 litres/km/cm
C. 1500 litres/km/cm
D. 2000 litres/km/cm
The liquid wastes from kitchens, bath rooms and wash basins, is not called________________?
A. Liquid waste
B. Sullage
C. Sewage
D. None of these
Kjeldahl nitrogen is a mixture of___________________?
A. Ammonia and nitrogen
B. Nitrogen and organic nitrogen
C. Organic nitrogen and ammonia
D. All the above
Which one of the following resists hydrogen sulphide corrosion ?
A. R.C.C.
B. Glazed stone wares
C. Asbestos cement
D. Glazed ware
The value of Chezy’s constant C = 157.6/(1.81 + K/ ) is used in__________________?
A. Chezy’s formula
B. Bazin’s formula
C. Kutter’s formula
D. Manning’s formula
The small sewers are cleaned by____________________?
A. Flushing
B. Cane rodding
C. Wooden pills
D. None of these
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