UKPSC AE Paper II 2013
⭕ A. Spiral
⭕ B. Froude’s cubic parabola
⭕ C. Lemniscates
⭕ D. S–curve
📚 Explanation:
The transition curve is used in railway tracks to provide a smooth change in direction and speed for trains.
🔹 Froude’s cubic parabola is widely used as it ensures a smooth transition between the straight line and the curve
🔹 It allows for gradual acceleration and deceleration of the train, minimizing sudden jerks.
🔹 This is important for the safety and comfort of passengers while also reducing track wear.
The transition curve is used in railway tracks to provide a smooth change in direction and speed for trains.
🔹 Froude’s cubic parabola is widely used as it ensures a smooth transition between the straight line and the curve
🔹 It allows for gradual acceleration and deceleration of the train, minimizing sudden jerks.
🔹 This is important for the safety and comfort of passengers while also reducing track wear.
👉 Therefore, the correct answer is: B. Froude’s cubic parabola
Key Concepts on Transition Curve:
- Transition curves smoothen the change in direction and speed
- Used to minimize jerks and improve comfort
- Froude’s cubic parabola is the most widely used type
- It balances the rate of change of curvature and centripetal force
- Used in both broad and meter gauge tracks
