To avoid scouring from end of structure, it is necessary to provide a ________________ at the exit point?

Related Mcqs:

1. A series of vertical steps in a stream made to avoid soil scouring is called ___________________?

   A. Levees
   B. Embankment
   C. Cascades
   D. Banks

2. At the end of hydraulic structure, the upward force of sub-soil water just becomes equal to the submerged weight of soil grains Then exit gradient will be called______________?

   A. Submerged exit gradient
   B. Critical exit gradient
   C. Balanced exit gradient
   D. All are correct

3. A channel artificially constructed for water conveyance of appreciable quantities with no problem of silting and scouring is called ____________________?

   A. A regime canal
   B. Stable canal
   C. Alluvial canal
   D. A and B are correct

4. In alluvial river due to the action of centrifugal force, bends are developed by scouring on concave and silting on convex _____________________?

   A. Silting & scouring
   B. Meandering
   C. Aggrading
   D. Degrading

5. If the weir flood is designed continuous with divide piers as reinforced structure,such that the weight of divide piers, keep the structure safe against uplift, is called__________________?

   A. Non-gravity weir
   B. Gravity weir
   C. Sharp crested weir
   D. Rectangular weir

6. According to Khosla’s theory of seepage, the Exit gradient depends upon ____________________?

   A. width /depth ratio
   B. depth /width ratio
   C. Length /depth ratio
   D. depth /Length ratio

7. To keep the Hydraulic structure safe against undermining the ________________ should be safe?

   A. Exit gradient
   B. Hydraulic gradient
   C. Creep length
   D. Critical exit gradient

8. In high floods, to avoid spilling of flood water over the gates, a wall is provided from pond level to high Flood level. This wall spans for the entire length of regulator, rest on piers, sustain water pressure by its weight called_____________________?

   A. Retaining wall
   B. Divide wall
   C. Breast wall
   D. Cantilever wall

9. A fish ladder is device by which flow energy can be dissipated in such a manner as to provide easy access to the downstream fish to come on upstream side, the velocity of flow varies from___________________?

   A. 2.0 – 2.5 – m/sec
   B. 2.5 – 3 m/sec
   C. 3.0 – 3.5 m/sec
   D. 3.5 – 4.0 m/sec

10. A structure constructed in channel width having narrow throat and raised floor in bottom, used for measuring discharge is called _____________________?

    A. Cippoletti weir
    B. Venturimeter
    C. Venturiflume
    D. regulator