That part of the flow in a stream comes from sub-soil or valley, may be beneath the top surface of channel bed is called__________________?

Related Mcqs:

1. A water rise takes place on down stream of sloping glacis, when a stream of water moving with high velocity and low depth strikes another stream of flow moving with low velocity and high depth, such breakage in water surface is called______________?

   A. Water wave
   B. Water tide
   C. Hydraulic jump
   D. Afflux

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 line in a flow net which shows the direction of flow of water through a soil mass beneath dam are called _________________?

   A. Equipotential lines
   B. flow lines
   C. Section lines
   D. Streak lines

4. The field capacity is the amount of water retained by a saturated soil mass after being acted by gravity. The amount of water required to bring the soil moisture content of that soil up to field capacity is called__________________?

   A. Soil-moisture deficiency
   B. Field-moisture deficiency
   C. Equivalent-moisture deficiency
   D. a and b are correct

5. The law that states that the discharge of sub-soil water is directly proportional to the loss of head and the area of soil sample and inversely proportional to to the length of soil sample ___________________?

   A. Archimed’s principle
   B. Darcy’s law
   C. Permeability law
   D. Thiem’s law

6. When seepage water after passing the ground water aquifer joins the surface stream, such stream will be called_____________________?

   A. Influent stream
   B. Effluent stream
   C. Rain stream
   D. Storm stream

7. The contour of equal water heads and pressure in the soil mass beneath retaining structure are called___________________?

   A. Stream lines
   B. Equipotential lines
   C. Equilibrium lines
   D. Streak lines

8. 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

9. 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

10. A channel is said lo be of most economical cross section, for a given cross-sectional area and bed slope when it __________________?

    A. Gives max. Discharge
    B. Has minimum wetted perimeter
    C. Involves lesser excavation
    D. All of these