What is the maximum ruling gradient permitted in Indian Railways in plains?

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Question

This question was previously asked in

JKSSB JE (Civil) Official Paper (Held On: 19 Nov, 2023)

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Answer 1

Explanation:

The ruling gradient is the steepest gradient permitted for a section of railway under normal operating conditions.
On plain terrain in Indian Railways, the standard ruling gradient ranges from 1 in 150 to 1 in 200
Since it's the maximum allowed, 1 in 150 represents the steepest permissible gradient in plains.

Additional Information

Hilly Terrain Ruling Gradient:

Ranges between 1 in 100 and 1 in 150, reflecting the need to manage steeper slopes.

Momentum Gradient:

Can be steeper than the ruling gradient because it relies on the train's momentum to climb short rises

Pusher (Helper) Gradient:

Requires additional locomotives to assist trains on very steep slopes; common in mountain sections such as the Western Ghats at 1 in 37 .

Station Yard Gradient:

Kept very low (flat) for safety and drainage—up to 1 in 400 —to prevent runaway stationary trains .