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Minimum depth of ballast prescribed of B.G. trunk lines of Indian Railways is?

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Minimum depth of ballast prescribed of B.G. trunk lines of Indian Railways is?

(a) 15 cm

(b) 10 cm

(c) 50 cm

(d) 25 cm

This question was addressed to me during an interview for a job.

My question comes from Dealing with Railways topic in section P.W.D of Civil Engineering Drawing

1 Answer

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Best answer
Right option is (d) 25 cm

Explanation: Track ballast forms the tracked upon which railroad ties (sleepers) are laid. It is packed between, below, and around the ties. It is used to bear the load from the railroad ties, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. This also serves to hold the track in place as the trains roll by.

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