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The surface of the head of each of the two rails can be maintained by using a ___________

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The surface of the head of each of the two rails can be maintained by using a ___________

(a) rail header

(b) rail trimmer

(c) rail grinder

(d) rail cutter

I had been asked this question in homework.

I need to ask this question from Railway Line topic in section Road Estimating, Sanitary and Water Supply Work of Civil Engineering Drawing

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The correct choice is (c) rail grinder

The best I can explain: A rail grinder (or rail grinder) is a maintenance of way vehicle or train used to restore the profile and remove irregularities from worn tracks to extend its life and to improve the ride of trains using the track. Rail grinders were developed to increase the lifespan of the tracks being serviced for rail corrugation. Rail grinding is a process that is done to stop the deformation due to use and friction on railroad tracks by removing deformations and corrosion.

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