The 'gradient compensation' on a railway curve means:
Choose the correct answer
Grade is increased on curves to maintain speed
Ruling gradient is reduced on curves to compensate for extra curvature resistance
Speed limit is removed on curves
Banking (superelevation) replaces gradient on curves
Correct Answer
B. Ruling gradient is reduced on curves to compensate for extra curvature resistance
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On curves, resistance to train movement increases due to curvature. To compensate, the actual gradient is reduced on curves. Compensation = 0.04% per degree of curve (broad gauge) or 0.03% per degree (metre gauge). So a 2° curve on BG: compensated gradient = ruling grade − 0.08%. This keeps total resistance constant.
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