When high flood passing down weir creating high up lift pressures and there is no flow in the canals, if such condition is taken for design and is called__________________?

Related Mcqs:

1. When the weight of weir balances the up lift pressure caused by the head of the water seeping below the weir bed is called ___________________?

   A. Cippollite weir
   B. Broad crested weir
   C. Gravity weir
   D. Non-gravity weir

2. When a weir is constructed, the downstream .bed of the river goes on eroding and consequently causes progressive lowering of the bed on downstream of weir called__________________?

   A. Retrogression
   B. Lowering down of bed
   C. Ponding on down stream
   D. All are correct

3. 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

4. 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

5. The wall of masonry or concrete, constructed at 90° to the axis of weir to separate normal weir from under sluices is called____________________?

   A. Divide wall
   B. Retaining wall
   C. Toe wall
   D. All are correct

6. The rise in river water level at up stream due to construction of weir is called__________________?

   A. Pond level
   B. HFL
   C. Afflux
   D. FSL

7. Hydraulic structures are designed for a safe flow of flood. The floods which are equal in designed magnitude life of the project is called _____________________?

   A. High floods
   B. Ordinary floods
   C. Low floods
   D. Probable flood

8. When the high flood level of the drain is sufficiently below the bed of the Canal that the drainage water flows freely under gravity, such structure is called___________________?

   A. Aqueduct
   B. Syphon-aqueduct
   C. Cross-Drainage
   D. Non-gravity structure

9. The under sluices in a weir are provided, at the level of upstream floor dispose off the sediment deposited on downstream is called______________________?

   A. Under sluices
   B. Head sluices
   C. Scouring sluices
   D. Sluice gates

10. The water way from a weir is determined by using Lacey’s wetted perimeter i.e. P=_______(Q)1/2 ?

    A. 3.50
    B. 3.75
    C. 4.75
    D. 5.75