Irrigation

Q1:

The uplift pressure on the roof of an inverted syphon, is maximum when

A drain in running dry

B canal is running dry

C canal is running with F.S.L.

D drain is running with H.F.L.

ANS:D - drain is running with H.F.L.

Syphon: When a canal flows under pressure below the natural drainage & the FSL of the canal is above the bed level of drainage but below the HFL of drainage. So, the answer is to be C.



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