Waste Water Engineering

A. More than the self-cleansing velocity
B. Less than the self-cleansing velocity
C. Less than 10 m/sec
D. More than 20 m/sec

A. Top side
B. Bottom side
C. Horizontal side
D. All sides

A. Distances 150 m to 300 m
B. Upper ends of branch sewers
C. Every change in the size of sewers
D. All the above

A. Q/(B × D)
B. Q/(L × D)
C. Q/L
D. Q/(B × L)

A. Bio-Chemical Oxygen Demand (B.O.D.)
B. Dissolved Oxygen (D.O.)
C. Chemical Oxygen Demand (C.O.D.)
D. None of these

A. 90 %
B. 95 %
C. 99 %
D. 9.9 %

A. Parabolic
B. Circular
C. Rectangular
D. New egged

A. Hydrology
B. Dissolved oxygen in water
C. Temperature
D. All the above

A. 45 %
B. 50 %
C. 55 %
D. 60 %

A. Imhoff Cone
B. Turbid meter
C. Potentiometer
D. None of these