| 1. | The maximum permissible turbidity for domestic supplies, on silica scale is ? | |
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5 to 10 ppm
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10 to 20 ppm
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20 to 30 ppm
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30 to 40 ppm
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Report Question| 2. | The water mains should be designed for .......... of the average daily water requirement ? | |
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100%
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150%
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225%
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250 %
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| 3. | The quantity of water available from an infiltration gallery depends upon the ? | |
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size of gallery
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nature of soil
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yield of source
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all of these
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| 4. | The yield of a surface stream may be obtained by ? | |
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cross-section velocity method
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stream gauging
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chemical method
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all of these
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| 5. | The commercial osmoscope is graduated with po values from ? | |
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0 to 5
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5 to 10
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10 to 15
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15 to 20
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| 6. | The presence of .................causes red colour in water ? | |
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iron
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manganese
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sodium fluoride
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calcium carbonate
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| 7. | The yield of the well depends upon the ? | |
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permeability of the soil
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position of water table
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depth of well in impervious layer
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all of these
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| 8. | Low turbidity of water can be determined by ? | |
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turbidity tube
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Jacksons turbidimeter
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Baylis turbidimeter
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Hellipe turbidimeter
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| 9. | The sodium carbonate 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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| 10. | The yield of the well is measured in ? | |
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cum/h
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litres/h
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either (a) or (b)
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none of these
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