Water Supply Engineering

251. The maximum hourly consumption, is generally taken as

  1. 1.1
  2. 1.2
  3. 1.4
  4. 1.5

Correct answer: (D)
1.5

252. The maximum non-verticality of the bore of a well 200 m deep, may be permitted up to

  1. 25 cm
  2. 50 cm
  3. 75 cm
  4. 100 cm

Correct answer: (D)
100 cm

253. The maximum permissible chloride content in treated water of public water supplies should not exceed

  1. 50 P.P.M.
  2. 100 P.P.M.
  3. 150 P.P.M.
  4. 250 P.P.M.

Correct answer: (D)
250 P.P.M.

254. The maximum permissible colour for domestic supplies based on cobalt scale, is

  1. 5 ppm
  2. 10 ppm
  3. 15 ppm
  4. 20 ppm

Correct answer: (D)
20 ppm

255. The maximum permissible hardness for public supplies is

  1. 95 mg/litre
  2. 105 mg/litre
  3. 115 mg/litre
  4. 125 mg/litre

Correct answer: (C)
115 mg/litre

256. The maximum permissible nitrites in public water supplies, is

  1. Nil
  2. 0.5 P.P.M.
  3. 1.0. P.P.M.
  4. 1.5 P.P.M.

Correct answer: (A)
Nil

257. The maximum permitted loss of head in a rapid sand filter, is

  1. 1 m
  2. 2 m
  3. 3 m
  4. 4 m

Correct answer: (C)
3 m

258. The maximum pressure to which a pipe is subjected to during its operation, is known

  1. Working pressure
  2. Design pressure
  3. Test pressure
  4. Pipe pressure

Correct answer: (A)
Working pressure

259. The maximum pressure to which cast iron pipes may be subjected to, is

  1. 3 kg/cm2
  2. 5 kg/cm2
  3. 7 kg/cm2
  4. 10 kg/cm2

Correct answer: (C)
7 kg/cm2

260. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called

  1. Working pressure
  2. Design pressure
  3. Test pressure
  4. Hydrostatic pressure

Correct answer: (C)
Test pressure

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