OPSC CIVIL SERVICES PRE 2011
⭕ A. Buckling
⭕ B. Creeping
⭕ C. Hogging
⭕ D. Bulging
📚 Explanation:
Buckling is the lateral or vertical deformation of rails caused due to temperature-induced expansion forces exceeding the rail’s resistance.
🔹 It typically occurs in long welded rail (LWR) tracks without proper expansion joints.
🔹 High temperatures cause steel rails to expand; if restrained, compressive forces build up and lead to lateral misalignment.
🔹 Proper anchoring and use of expansion gaps are essential to prevent buckling.
Buckling is the lateral or vertical deformation of rails caused due to temperature-induced expansion forces exceeding the rail’s resistance.
🔹 It typically occurs in long welded rail (LWR) tracks without proper expansion joints.
🔹 High temperatures cause steel rails to expand; if restrained, compressive forces build up and lead to lateral misalignment.
🔹 Proper anchoring and use of expansion gaps are essential to prevent buckling.
👉 Therefore, the correct answer is: A. Buckling
Key Concepts on Rail Buckling:
- Caused by thermal expansion in long welded rails
- More likely in summer or under extreme heat
- Can lead to derailment if not corrected
- Controlled with expansion joints and proper anchoring
- Regular maintenance is key for rail safety
