In septic tanks__________________?
The factor responsible for purification of sewage in river is________________?
To maintain aerobic biological activity, the moisture content of the compost mass should be about_________________?
The pH value of sewage is determined with the help of_________________?
The normal value of over flow rates for plain primary sedimentation tanks, ranges between________________?
Which one of the following statements regarding septic tanks is wrong ?
In areas where rainy season is limited to a few months, the type of sewerage system recommended is__________________?
In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is_______________?
5 days-biochemical oxygen demand (BOD5) is taken at a temperature of_________________?
Pick up the in-correct statement from the following?
