If the critical shear stress of a channel is xc, then the average value of shear stress required to move the grain on the bank is___________________?

Related Mcqs:

1. 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

2. The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD. curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be__________________?

   A. 100 mm
   B. more than 100 mm
   C. less than 100 mm
   D. none of the above

3. A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If <j) index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is___________________?

   A. 4.5 cm
   B. 6.0 cm
   C. 7.5 cm
   D. 9.0 cm

4. For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?

   A. rabi or kharif
   B. rabi and kharif or sugarcane
   C. rabi and sugarcane or kharif and sugarcane
   D. rabi or kharif or sugarcane

5. 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

6. The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called________________?

   A. proportionality
   B. flexibility
   C. setting
   D. sensitivity

7. 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

8. The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by______________?

   A. 4RS
   B. 11 RS
   C. 7RS
   D. 15 RS

9. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are_________________?

   A. at right angle and parallel to weir crest
   B. parallel and at right angle to weir crest
   C. parallel to weir crest in both
   D. at right angle to weir crest in both

10. The major resisting force in a gravity dam is___________________?

    A. water pressure
    B. wave pressure
    C. self-weight of dam
    D. uplift pressure