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.Management Sciences
Category: Irrigation, Water Resources Engineering and Hydrology
Select the incorrect statement ?
A. Intensive irrigation should be avoided in areas susceptible to water logging
B. Extensive irrigation should be adopted in areas susceptible to water logging
C. Lift irrigation increases water logging
D. all of the above
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
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
Lining of irrigation channels________________?
A. increases the waterlogging area
B. decreases the waterlogging area
C. does not change the water logging area
D. none of the above
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
The best unit duration of storm for a unit hydrograph is________________?
A. 1 hour
B. one-fourth of basin lag
C. one-half of basin lag
D. equal to basin lag
The runoff increases with________________?
A. increase in intensity of rain
B. increase in infiltration capacity
C. increase in permeability of soil
D. all of the above
Which of the following canal outlets maintains a constant discharge ?
A. non-modular outlet
B. flexible outlet
C. rigid module
D. none of the above
Which of the following methods of applying water may be used on rolling land ?
A. boarder flooding
B. check flooding
C. furrow flooding
D. free flooding
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