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11
For the prediction of future population of a city, the factor to be considered, is
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Answer: Option D
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12
The factor affecting per capita demand, is
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Answer: Option D
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13
By boiling water, hardness can be removed if it is due to
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Answer: Option D
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14
In slow sland filters, the turbidity of raw water can be removed only up to
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Answer: Option A
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15
When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied
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Answer: Option B
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16
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$$\sqrt {\text{Q}} ,$$  the water horse power of the pump is
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Answer: Option D
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17
The process of passing water through beds of granular materials, is called
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Answer: Option C
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18
Surcharge storage zone of a reservoir, is
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Answer: Option C
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19
Pick up the correct statement from the following:
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Answer: Option D
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20
Surge tanks are used
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Answer: Option D
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