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

Related Mcqs:

1. 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

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. 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

4. 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

5. 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

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. Sediment particles smaller than 0.002 mm which do not settle in water are called____________________?

   A. Fine silt particles
   B. Fine clay particles
   C. Colloids
   D. All are correct

8. If a river or stream is collecting sediment and is building up dunes in its bed is called ______________________?

   A. Stable river
   B. Sub-stable river
   C. Aggrading river
   D. Sediment river

9. The water level required on the upstream side of a canal head regulator, so as to feed the off-taking canal with its full supply is called_________________?

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

10. The hydraulic jump is formed on down stream of toe of glacis for the purpose to dissipate surplus energy of the flowing water, the nature and strength of jump depends upon a Number called______________________?

    A. Reynolds
    B. Froude No
    C. Webber
    D. Darcy,s law