Waste Water Engineering
The sewers

Must flow under gravity ½ to ¾ full
All listed here
Must be of adequate size to avoid over flow
Must be laid at least 2 to 3 m deep to collect /water from the basements

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
Pick up the incorrect statement from the following for allowing workers to enter sewers

The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes
Proper tests for the presence of poisonous gases must be carried out
The men entering the manhole should be advised to smoke in the sewer
Warning signals should be erected

ANSWER DOWNLOAD EXAMIANS APP