| 1. | The main cause of silting in channel is ? | |
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non-regime section
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inadequate slope
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defective head regulator
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all of these
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Report Question| 2. | The infertility of the soil in water-logged areas is due to ? | |
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inhibiting activity of the soil bacteria
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growth of weeds
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increasing of harmful salts
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all of these
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| 3. | Garret's diagram gives the graphical method of designing a channel based on ? | |
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Lacey's theory
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Gibb's theory
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Kennedy's theory
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Khosla's theory
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| 4. | A contour canal ? | |
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is most suitable in hilly areas
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irrigates only on one side
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is aligned parallel to the contour of the country
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all of the above
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| 5. | The knowledge of hydrology is necessary in civil engineering for ? | |
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designing and construction of irrigation structures
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designing and construction of bridges and culverts
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flood control works
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all of these
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| 6. | The consumptive use of water of a crop ? | |
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is measured as the volume of water per unit area
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is measured as depth of water on irrigated area
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may be supplied partly by precipitation and partly by irrigation
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all of the above
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| 7. | Sandy soils with good drainage become impermeable after prolonged use, if it is irrigated with water containing ........ sodium ? | |
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25%
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50%
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75%
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85%
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| 8. | The crops require maximum water during ? | |
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first watering before sowing the crops
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last watering before harvesting
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first watering when the crop has grown a few centimetres
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all of the above
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| 9. | For the repairing of an old but sound concrete lining, the lining preferred is ? | |
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shotcrete lining
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precast concrete lining
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soil cement lining
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sodium carbonate lining
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| 10. | Liquid precipitation consists of ? | |
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snow
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hail
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sleet
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rainfall
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