Environmental Engineering
Scour valves are provided

At every depression and dead ends to drain out the waste water that may collect there
At street corners to control the flow of water
At every summit of rising mains
At the foot of rising main along the slope to prevent back running of water

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering
Sludge volume index is defined as the ratio of

Percentage of total solids by weight to percentage of sludge by volume
Percentage of sludge by volume to percentage of total solids by weight
Percentage of sludge by volume to percentage of suspended solids by weight
Percentage of suspended solids by weight to percentage of sludge by volume

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering
Double filtration is used

To increase the filtration rapid sand filters capacity of
To increase the filtration slow sand filters capacity of
For isolated buildings like pools, hotels etc swimming
All of these

ANSWER DOWNLOAD EXAMIANS APP