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Name the form of track, the rails are welded together by utilising flash butt welding to form one continuous rail that may be several kilometres long.(a) INR(b) CBR(c) SBBR(d) WSR |
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Answer» The correct choice is (b) CBR Easy explanation: The preferred process of flash butt welding involves an automated track-laying machine running a strong electric current through the touching ends of two unjoined rails. The ends become white hot due to electrical resistance and are then pressed together forming a strong weld. Thermite welding is used to repair or splice together existing CWR segments. This is a manual process requiring a reaction crucible and form to contain the molten iron. Thermite-bonded joints are seen as less reliable and more prone to fracture or break. |
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