Multiple choice

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

  1. upper

  2. middle

  3. inner

  4. outer

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

On curved tracks, ballast depth is increased under the inner edge of sleepers. This provides additional support to counteract the lateral forces and centrifugal action that push tracks outward on curves.