Water Supply Engineering

301. To detect the turbidity of the order of 0 to 1000 P.P.M. the instrument used is

1. Turbidimeter
2. Jackson turbidimeter
3. Baylis turbidimeter
4. Hellige turbidimeter

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302. To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 Q, the water horse power of the pump is

1. 400
2. 450
3. 500
4. 600

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303. To remove very fine suspended particles from water, the method adopted is

1. Screening
2. Sedimentation
3. Boiling
4. Filtration

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304. Total flow in stream is known

1. Run off
2. Stream flow
3. Discharge
4. All the above

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305. Turbidity of raw water is a measure of

1. Suspended solids
2. Acidity of water
3. B.O.D.
4. None of these

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306. Turbidity of water is expressed

1. In ppm
2. In numbers in an arbitrary scale
3. By pH value
4. By colour code

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307. Turbidity of water may be caused due to

1. Suspended clay
2. Suspended silt
3. Finely divided organic material
4. All the above

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308. Underground water is obtained from

1. Rains
2. Rivers
3. Lakes
4. Springs

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309. Velocity of flow of water in plain sedimentation water tank, is normally kept

1. 3 cm/minute
2. 10 cm/minute
3. 20 cm/minute
4. 30 cm/minute

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310. Water gets evaporated from water surfaces and land surfaces, get converted into water drops at lower temperatures, flows over ground surface and finally meets its source, i.e. lake, sea, etc. This entire process is generally known as

1. Hydrological cycle
2. Water cycle
3. Evaporation and precipitation cycle
4. All the above

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