in most economical Trapezoidal section, half of the Top width is equal to _________________?

Related Mcqs:

1. 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

2. The most economical central angle of an arch dam is made at ___________________?

   A. 123º
   B. 133!
   C. 143º
   D. 153º

3. For an economical design of gravity dam, the shear friction factor causec compression strength should lie between____________________?

   A. 1.5 to 4.0
   B. 2.0 to 4.0
   C. 2.5 to 4.5
   D. 3 to 5

4. According to Chezy’s formula, the discharge through an open channel is equal to _________________?

   A. C (mi) ^1/2
   B. A (cmi)^1/2
   C. Ac√R.S
   D. A (c.A/pi) ^1/2

5. A structure constructed in channel width having narrow throat and raised floor in bottom, used for measuring discharge is called _____________________?

   A. Cippoletti weir
   B. Venturimeter
   C. Venturiflume
   D. regulator

6. 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__________________?

   A. Sub-surface flow
   B. Base flow
   C. Ground flow
   D. All are correct

7. The height from the top of the embankment to the normal water level in canal .Dam – Reservoir etc, which allows for small waves to splash without over flow is called___________________?

   A. Free board
   B. Free space
   C. Free faced
   D. Free end –

8. Water available above the top of root zone of plants is about 15% of soil moisture contents, is mostly not available to plants celled_________________?

   A. Capillary water
   B. Irrigation water
   C. Effective water
   D. Hygroscopic water

9. A well penetrated in ground water confined between impervious layer at its top and bottom is called __________________?

   A. Non-artesian
   B. Artesian well
   C. Perched
   D. Un-confined

10. The inverted filter consists layer of materials of increasing ______________ from bottom to top?

    A. Piping
    B. Under mining
    C. Permeability
    D. Up thrust pressure