Category: Waste Water Engineering

A. Aeration is continued till stability
B. Aeration is done with an admixture of previously aerated sludge
C. Sludge is activated by constant stirring
D. Water is removed by centrifugal action

A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide

A. The shape is rectangular
B. Detention period is 2 hours
C. The velocity of flow is restricted to 0.30 m/minute
D. All the above

A. Sanitary sewage
B. Storm sewage
C. Surface water
D. Ground water

A. Total organic solids
B. Total solids
C. Total in organic solids
D. Settleable solids

A. It is acidic
B. It is alkaline
C. It is neutral
D. None of these

A. 100 cm
B. 120 cm
C. 140 cm
D. 160 cm

A. Carbondioxide
B. Oxygen
C. Nitrogen
D. Sulphur-dioxide

A. D
B. 1.25 D
C. 1.5 D
D. 1.75 D

A. 1/4
B. 1/3
C. 1/2
D. 3/4