177. Non-pathogenic bacterias cause the following water borne disease,
178. Steel pipe are
179. The most ideal disinfectant used for drinking water throughout the world, is
180. A centrifugal pump is required to be primed before starting if it is located
181. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called
182. Filtration of water is done to remove
183. Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of
184. Ground water from artesian wells
185. Property of earth to allow water to pass through it, is known as
186. Derivation of Thiem's formula
is based on the assumption
187. Water is supplied from the source to the treatment plant under gravity in
188. Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m2 , generally range between
189. In a rapid sand filter, air binding is caused due to excessive
190. If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in
191. A circular gravity aqueduct is not generally preferred to because of
192. Standard unit of turbidity of water is in one litre of distilled water, one milligram of finely divided
193. Water losses in water supply, is assumed as
194. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form
195. 'Shrouding' is essentially provided in
196. The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is
197. Chemical coagulation of drinking water, is done
198. Demand for public uses in a city, does not include water required for
199. The chloride content of treated water for public supplies should not exceed