183. PH value of sludge during alkaline regression stage, is
184. Pick up the correct statement from the following :
185. The sewerage system consists of
186. The sewer that unloads the sewage at the point of treatment is called
187. The sewer pipe which carries sewage from a building for immediate disposal is
188. In areas where rainy season is limited to a few months, the type of sewerage system recommended is
189. In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is
