The aeration of water is done to remove _________________?

Related Mcqs:

1. Aeration holes are provided to reduce the inside saturation pressure ____________________?

   A. In a weir with end contractions
   B. In a suppressed weir
   C. In a cippoletti weir
   D. In all weir

2. The field capacity is the water retained by a saturated soil after free drainage of surplus water to the ground water table but the water retained by a saturated soil after being centrifuged by a centrifugal force of 1000 times that of gravity is called________________?

   A. Soil moisture
   B. Equivalent moisture
   C. Field moisture
   D. Available moisture

3. The angle between a head regulator and entrance of water, for smooth entry of water in a canal is kept as _________________?

   A. 90°
   B. 100°
   C. 110°
   D. 120°

4. Art of mixing saline water with fresh water in accordance with some ratio for irrigation purpose is called _________________?

   A. Amalgamation
   B. Mixing of water
   C. Desalinization
   D. All are correct

5. Hydrology is the science which deals with the depletion and recharge of water resources yearly therefore. its knowledge is a must to _________________ properly the water resources?

   A. Develop
   B. Manage
   C. Remodel
   D. Rehabilitate

6. 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

7. A water pool is designed on the down stream of the hydraulic structure to dissipate the energy of falling water by providing a water cushion called ______________________?

   A. Water pool
   B. Cistern
   C. Down stream pond
   D. Water cushion

8. The water evaporates from paddy surfaces to the atmosphere in the form of water vapours, these water vapours get collected in the atmosphere and behave & like_________________?

   A. Water
   B. Snow
   C. Ice particles
   D. Gas

9. Water logging caused by ____________ water, which during excessive irrigation percolates down and join under ground water table?

   A. Capillary
   B. Hygroscopic
   C. Gravity
   D. Free

10. Wilting point is that limit after that the crop starts feeding up and no water is available for plant, this point occurs after _________________?

    A. 30% water available
    B. 25% water available
    C. 20% water available
    D. All are correct