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Modern track typically uses _____________ with a profile of an asymmetrical rounded I-beam.

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Modern track typically uses _____________ with a profile of an asymmetrical rounded I-beam.

(a) wooden

(b) iron

(c) hot-rolled steel

(d) alloy of aluminium

The question was posed to me in semester exam.

My doubt is from Dealing with Railways in division P.W.D of Civil Engineering Drawing

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Correct option is (c) hot-rolled steel

To elaborate: Unlike some other uses of iron and steel, railway rails are subject to very high stresses and have to be made of very high-quality steel alloy. It took many decades to improve the quality of the materials, including the change from iron to steel. The stronger the rails and the rest of the trackwork, the heavier and faster the trains the track can carry.

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