A. at street corners to control the flow of water
B. at every depression and dead ends to drain out the waste water that may collect there
C. at the foot of rising main along the slope to prevent back running of water
D. at every summit of rising mains
Environmental Engineering
Environmental Engineering
A. check valve
B. sluice valve
C. safety valve
D. scour valve
A. circle method
B. equivalent pipe method
C. electrical analysis method
D. Hardy cross method
A. grid iron system
B. dead end system
C. ring system
D. radial system
A. dead end system
B. grid iron system
C. radial system
D. ring system
A. disinfection
B. removing hardness
C. removing odours
D. removing corrosiveness
A. it is unsuitable for turbid and acidic water
B. huge amount of precipitate is formed which creates a disposal problem
C. the effluent cannot be reduced to zero hardness
D. it is unsuitable for softening the water of excessive hardness
A. reduced at higher pH value of water
B. unaffected by pH value of water
C. increased at higher pH value of water
D. highest at pH value equal to 7
A. 9500
B. 9800
C. 10100
D. 10920
A. increases
B. decreases
C. remains unaffected
D. none of the above
