Lining of irrigation channels________________?

Related Mcqs:

1. Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as__________________?

   A. low sodium water
   B. medium sodium water
   C. high sodium water
   D. very high sodium water

2. Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain ?

   A. canal fall
   B. canal outlet
   C. canal escape
   D. canal regulator

3. The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called________________?

   A. effective rainfall
   B. consumptive use
   C. consumptive irrigation requirement
   D. net irrigation requirement

4. With the increase in the quantity of water supplied, the yield of most crops_________________?

   A. increases continuously
   B. decreases continuously
   C. increases upto a certain limit and then becomes constant
   D. increases upto a certain limit and then decreases

5. When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be_______________?

   A. 0 and wH212
   B. wH2/2and wH2/3
   C. wH and 0
   D. OandwII

   where w is unit weight of water and H is the depth of water

6. The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is________________?

   A. less than 1
   B. equal to 1
   C. greater than 1
   D. equal to zero

7. A hyetograph is a graphical representation of___________________?

   A. rainfall intensity and time
   B. rainfall depth and time
   C. discharge and time
   D. cumulative rainfall and time

8. Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

   A. slope-area method
   B. area-velocity method
   C. moving boat method
   D. ultra-sonic method

9. Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey’s theory will be_________?

   A. 19 m
   B. 38m
   C. 57m
   D. 76m

10. The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called_________________?

    A. hygroscopic water
    B. equivalent moisture
    C. soil moisture deficiency
    D. pellicular water