Question

Which of the following combination is not correct?

(a) Feeder canal – no direct irrigation is carried out

(b) Protective canal – constructed as a relief work during the famine

(c) Lined canal – provided with a lining of impervious material on its bed

(d) Contour canal – provision of cross drainage works is not required

The question was posed to me in homework.

Enquiry is from Canal Irrigation System in chapter Canal Irrigation System of Irrigation Engineering

Answer 1

Correct choice is (d) Contour canal – provision of cross drainage works is not required

Best explanation: A feeder canal is used to feed another canal and no direct irrigation is carried out from it. A protective canal is constructed to provide employment in the famine-affected area. A lined canal is provided with a lining of impervious material to prevent the seepage of water. A contour canal has to cross the drainage and hence, cross drainage works are required.