Correct Answer  Option 2 : Minimum radius of vertical curves for group A, Brand Gauge track is 4,000 m
Statement I: False
The maximum allowable cant excess is
For BG – 75 mm
For MG 50 mm
For NG 40 mm
Statement II: True
The minimum value of radius of vertical curves for Brand Gauge track for various groups is as follow:
For Group A – 4000 m
For Group B 3000 m
For Group C, D and E 2500 m
Statement III: False
The maximum value of superelevation of different gauges is given below:
Track

Speed < 120 kmph

Speed > 120 kmph

BG

16.5 cm

18.5 cm

MG

10 cm



NG

7.6 cm



As one can see from the above table, the maximum value of superelevation lies in between 1/10^{th} to 1/12^{th} of the gauges.
Statement IV: False
The equilibrium superelevation for given speed or speed of the curve for given superelevation is calculated from the formula:
\(e = \frac{{G{V^2}}}{{127\;R}}\)
Where E is superelevation in mm; G is the gauge of track width of railhead in mm; R is the radius of the curve in meters.