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What will be the curve lead for a 1 in 8.5 turnout taking off from a straight BG track?

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What will be the curve lead for a 1 in 8.5 turnout taking off from a straight BG track?
1. 28.49 m
2. 21.04 m
3. 14.24 m
4. 7.45 m
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Correct Answer - Option 1 : 28.49 m

Concept:

Curve lead = 2GN

Where, G = Gauge of track

N = Number of crossing

Calculation:

Given,

N = 8.5

Gauge length for BG track (G) = 1.676 m

Curve lead = 2GN = 2 × 1.676 × 8.5 = 28.49 m
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