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Tunnelling

Q1:

For B.G. single track railway, the height of the tunnel above top of rails should be

A 5.5 m to 5.8 m

B 5.8 m to 6.2 m

C 6.7 m to 7.3 m

D 7.3 m to 7.5 m

ANS:C - 6.7 m to 7.3 m

Width of the tunnel : 4.9 - 5.5.
Ht. Of tunnel: 6.7 - 7.3.



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