# Practice Test: Question Set - 01

1. The consumptive use of water for a crop
(A) Is measured as the volume of water per unit area
(B) Is measured as depth of water on irrigated area
(C) May be supplied partly by precipitation and partly by irrigation
(D) All the above

2. Canals taken off from ice-fed perennial rivers, are known
(A) Permanent canals
(B) Ridge canals
(C) Perennial canals
(D) Inundation canals

3. In gravity canals, F.S.L. is
(A) Always at the ground level
(B) Always below the ground level
(C) Generally 4 to 5 meters above the ground level
(D) Only a few cm above the ground level

4. 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
(A) 8 cm
(B) 10 cm
(C) 12 cm
(D) 14 cm

5. If water table is comparatively high, the irrigation canal becomes useless, due to
(A) Large amount of seepage
(B) Water logging of the cultivated areas
(C) Uncertain water demand
(D) All the above

6. If A is the area of the surface, x̅ is the depth of its C.G. from the surface of the water and Ï‰ is the density of water, then
(A) Total pressure on the surface is equal to Ï‰x̅
(B) Depth of the point at which total pressure acts is equal to its moment of inertia divided by Ax̅
(C) Depth of the centre of pressure is 2/3H vertically below the surface
(D) All the above

7. In a syphon aqueduct
(A) Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough
(B) Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough
(C) Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough
(D) Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough

8. If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation
(A) t = (h + 1)/(G + t)
(B) t = (h - 1)/(G + t)
(C) t = (h - 1)/(G - t)
(D) t = (h + 1)/G

9. To hold hydraulic jumps, baffle walls are provided in
(A) Sarda type falls
(B) English type falls
(C) Montague type falls
(D) Vertical type falls

10. Pick up the correct sequence of the part of a canal system from the following
(D) Heads works-branch canal-main canal distributary, minor

11. The field capacity of a soil depends upon
(A) Capillary tension in soil
(B) Porosity of soil
(C) Both (a) and (b)
(D) Neither (a) nor (b)

12. The water face of the guide banks, is protected by
(A) One men stone pitching
(B) Two man stone pitching
(C) Three man stone pitching
(D) Four man stone pitching

13. Pick up the correct statement from the following
(A) Escapes are essential safety valves in a canal system
(B) The escapes must lead the surplus water to natural drainages
(C) The escapes are aligned to take advantage of contours of lower values
(D) All the above

14. For a unique design of a channel by Kennedy's theory
(A) Its breadth must only be known
(B) Its depth must only be known
(C) Its breadth and depth ratio must only be known
(D) All the above

15. The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called
(A) Syphon
(B) Super passage
(C) Super-aqueduct
(D) Syphon aqueduct

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