Irrigation Engineering
When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. doesnot touch the underside of the supporting structure, the structure so provided, is called

Aqueduct
Super passage
Syphon
Syphon-aqueduct

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

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