A Broad Gauge branch line takes off as a contrary flexure from a main line. If the superelevation required for branch line is 10 mm and cant deficiency is 75 mm, the super-elevation to be actually provided on the branch line will be
A)10 mm
B)64 mm
C)85 mm
D)65 mm

Question

Quizplus · Accepted Answer

The actual superelevation provided is the superelevation required minus the cant deficiency. Therefore, 10 mm (required superelevation) + 75 mm (cant deficiency) = 85 mm. However, the question asks for the superelevation to be actually provided, which is the required superelevation minus the cant deficiency, resulting in 10 mm - 75 mm = -65 mm. Since negative superelevation is not possible, the correct approach is to provide the maximum possible superelevation without exceeding the deficiency, which is 65 mm.

A Broad Gauge Branch Line Takes Off as a Contrary