Steel sleepers are ..... shaped in section.
-
oval
-
rectangular
-
trough
-
semi-spherical
C
Correct answer
Explanation
Steel sleepers have a trough (also called channel or trough-shaped) cross-section. This shape provides strength while allowing the sleepers to hold ballast and maintain position. The trough profile is characteristic of steel sleeper design, unlike timber or concrete sleepers which have different shapes.