| 1. | The presence of sodium chloride in water ? | |
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causes bad taste
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softens the water
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increases hardness of water
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stops epidemic
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Report Question| 2. | Turbidity of water is expressed in terms of ? | |
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silica scale
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platinum cobalt scale
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no value
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none of these
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| 3. | The most important source of water for public water supply is ? | |
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lake
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pond
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river
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sea
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| 4. | The yield of a underground source may be obtained by ? | |
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pumping test
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recupating test
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both (a) and (b)
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none of these
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| 5. | The water bearing strata i.e. layers of sand, gravel etc. is called ? | |
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an acquifer
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an aquiclude
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an aquifuge
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zone of saturation
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| 6. | The design period for a water supply project is taken as ? | |
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5 to 10 years
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10 to 15 years
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15 to 20 years
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20 to 30 year
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| 7. | The water supply system means ? | |
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the entire scheme of collection and disposal of liquid waste
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the complete layout from the source of supply to the distribution
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construction of reservoirs
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construction of canals
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| 8. | Which of the following statement is correct ? | |
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If the pH value of water is equal to 7, the water is said to be neutral
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The pH value determines the strength of the acid or alkali in water
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The pH value of water can be obtained by a potentiometer
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all of the above
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| 9. | The portion of soil through which lateral movement of water take place is ? | |
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water table
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an aquiclude
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zone of saturation
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none of these
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| 10. | When in the previous strata, the surface of water surrounding the well is at atmospheric pressure, well is known as ? | |
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gravity well
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artesian well
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open well
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deep well
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