Sabotage problem is eliminated in ___

The energy gradient line is ___ to drop in bed, in an open channel.

The wing wall resembling the letter “U” in plan, is _______

What is the splay provided in splayed wing walls?

For each sleeper ___ pandrol clips are used.

The Wheels of Rolling stock have slope ____

Aqueduct is an example of ______ channel.

Rectangular channel is _____ channel.