| 1. | The open wells or dug wells ? | |
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act as a small storage reservoir
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are suitable for a small discharge all of
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are cheap in construction
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all of these
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Report Question| 2. | High 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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| 3. | Colloidal impurities if associated with organic matter having bacterias becomes the chief source of ? | |
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hardness
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epidemic
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alkalinity
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bad taste
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| 4. | The maximum permissible temperature for domestic supply is ? | |
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5 to 10°C
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10 to 15°C
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15 to 20°C
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20 to 25°C
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| 5. | When lead is present in water, it ? | |
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changes its colour
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causes turbidity
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causes alkalinity
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none of these
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| 6. | The water obtained from is generally known as underground water ? | |
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infiltration galleries
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springs
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rivers
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wells
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| 7. | According to Indian standards, 45 litres of water per person per day is provided in case of ? | |
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hotels
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hostels
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offices
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all of these
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| 8. | The most common cause of acidity in water is ? | |
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hydrogen
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oxygen
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carbon dioxide
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all of these
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| 9. | Dissolved impurities consist of ? | |
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bacteria
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iron
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slit
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fungi
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| 10. | For large cities, the suitable method for forecasting population is ? | |
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arithmetical increase method
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graphical method
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geometrical increase
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comparative method
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