Steel sleepers are ..... shaped in section.

The rails are welded by:

Bone shaped section of fish plate is commonly used for connecting:

The granular material spread on the formation of a railway track for the sleepers to rest upon is known as:

The recommended depth of ballast cushion on a curved portion of a track is provided under the ........ edge of the sleeper.

The minimum height of embankment above the highest flood mark in the area should be: