46251. The process of passing water through beds of granular materials, is called
46252. If Q is discharge is cubicmetres per sec and D is the economical diameter of the pipe. According to Lea
46253. Water to the consumers may be supplied from
46254. If the average daily demand of a city of 50, 000 population, is 20 m.l.d., the maximum daily demand is
46255. Recuperation test is carried out to determine
46256. The discharge for the confined tube well is obtained from
46257. Turbidity of water is expressed
46258. The ratio of the maximum daily consumption to the average daily demand, is
46259. The ratio of discharge and plan area of a continuous flow type settling tank, is known
46260. The maximum pressure to which a pipe is subjected to during its operation, is known
46261. To control the growth of algae in reservoirs, the compound which is used, is
46262. Pick up the wrong nominal internal diameter of cast iron (spun) pipes in mm from the following :
46263. Hardness of water can be removed by boiling if it is due to
46264. A well is considered to be good if it is sunk into
46265. The nitrate concentration in domestic water supplies, is generally limited to
46266. Sluice valves in main water supplies
46267. Dead storage of a reservoir of Q capacity generally provided for silt deposition during its life time, is generally kept
46268. If the specific capacity of a well is 0.3183 x 10-3 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is
46269. The factor to be considered for the source of city water supply, is
46270. Yield of a drainage basin is :
46271. Normal values of overflow rate for plain sedimentation tank using coagulants, is
46272. The formula Q = P - K[1.8T + 32] in which Q is runoff, P is annual rain fall in cm, T is mean annual temperature in centigrades and K is a constant, is known
46273. The formula for pipe flows, suggested by, Hazen-William is
46274. While selecting the location of an intake for collecting surface water, the factor considered, is
46275. Aqueducts are generally designed
46276. Gravity conduits
46277. Carbonates in water produce
46278. Hardness of water is caused by
46279. A slow sand filter is cleaned if its filter head is higher than
46280. A strainer type well sunk through three pervious layers intervened by three impervious aquicludes, draws water from
46281. The permissible amount of nitrites present in potable water, is
46282. Water having pH value as 6, is
46283. Alum is chemically
46284. If w is the weight of water per cubic metre, Q is the discharge in cubic metres per sec and H is the total head, the required water horse power of the pump, is
46285. Perched acquifers are generally found
46286. Pickup the incorrect statement from the following :
46287. Detention period of a settling tank is
46288. The order of existence of three portions of water in a reservoir from the bottom to top is
46289. The approximate diameter of a water mains for supplying 7.2 mld with a velocity 1.2 m/sec, is
46290. The chlorine supply cylinders are generally kept at 38°C to 40°C to prevent
46291. The capability of a soil mass of full width and depth to transmit water, is known
46292. Well treated water is generally supplied for
46293. Non-pathogenic bacterias cause the following water borne disease,
46294. Steel pipe are
46295. The most ideal disinfectant used for drinking water throughout the world, is
46296. A centrifugal pump is required to be primed before starting if it is located
46297. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called
46298. Filtration of water is done to remove
46299. Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of
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