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

Related Mcqs:

1. 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

2. Specific weight of a liquid is defined as the weight per unit volume at standard Temperature & pressure therefore specific weight of water of water is equal to ____________ kg/m3 in MKS system ?

   A. 990
   B. 995
   C. 999
   D. 1000

3. A dam which the up lift pressure of the sub-soil water by its own weight is called _________________?

   A. Buttress dam
   B. Arch dam
   C. Gravity dam
   D. Concrete dam

4. 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

5. 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__________________?

   A. High flood level
   B. Dangerous condition
   C. Hydraulic design condition
   D. Worst condition

6. According to Mr. Khosla, the seeping water creates undermining and the undermining starts from__________________?

   A. Down stream to up stream
   B. Up stream to down stream
   C. Top to bottom
   D. Bottom to top

7. 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

8. The structures, which are constructed on the river bed upstream of head regulator. With this clear water enters in canal such structures are called______________________?

   A. Silt excluders
   B. Silt ejectors
   C. Vortex pipes
   D. Silt control structures

9. 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

10. Specific gravity of a liquid is defined as the ratio of its specific weight to that of pure water and standard temperature and pressure. Therefore specific gravity is equal to ___________________?

    A. 1.0
    B. 1.2
    C. 1.5
    D. 2.0