Irrigation Engineering
Generally the weir is aligned at right angles to the direction of the main river current because

It ensures less length of the weir
It is economical
All of these
It gives better discharging capacity

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Irrigation Engineering
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 :

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is false but R is true
A is true but R is false

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