The capillary control can be controlled by how many methods?

If the canal and drain at same level then the cross drainage structure is called ______

Which type of drainage most advisable in cutting?

The swelling and shrinkage is mostly seen in ______

The time of flow in minutes for a longitudinal drain of 400 m and with a velocity of 0.8 m/sec is?

The highway drainage requirement don’t include __________

How many components are present in the surface drainage system?

The rational formula is ______