Irrigation Online Test – Multiple Choice Questions & Answers 1. The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called syphon aqueduct super passage super-aqueduct aqueduct 2. The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5. If the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is 4cm 12cm 14cm 16cm 3. For a unique design of a channel by Kennedy’s theory its depth must only be known its breadth must only be known its breadth and depth ratio must only be known All 4. Bligh’s theory of seepage assumes loss of head follows the sine curve less weightage to horizontal creep than vertical creep equal weightage to the horizontal and vertical creep more weightage to horizontal creep than vertical creep 5. Canals taken off from ice-fed perennial rivers, are known permanent canals ridge canals perennial canals inundation canals 6. If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is 1000 1200 1400 1600 7. In north Indian Plains, optimum depth of kor watering for wheat, is 13.5 cm 17.5 cm 19.0 cm 23.0 cm 8. A hydraulic structure is designed to withstand hydraulic pressure seepage forces hydraulic jump All 9. The length and width of a meander and also the width of the river, vary roughly as discharge square root of the discharge square of the discharge cube of the discharge 10. Useful soil moisture for plant growth, is chemical water gravity water capillary water hygroscopic water Loading … Question 1 of 10
