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Q. Explain stages of attending to Rail fracture?
Various stages of attending to Rail fracture / weld failure in a L.W.R. track in field -
Equipment required -
i) Special 1 meter long fishplates with screw clamps and Joggled fishplates with bolted clamps (for fractures at welded joints) .
ii) Steel tape capable of reading up to one mm.
iii) Alumino-thermic welding and finishing equipment.
iv) Equipment for destressing.
v) 6.5 meter long sawn rail cut piece of the same section as LWR duly tested by USFD.
vi) Rail closures of suitable lengths.
vii) Equipment for protection of track.
viii) Equipment for night working.
A 3-kVA, 220:110-V, 60-Hz, single-phase transformer yields these test data: • Open-circuit test: 200 V, 1.4 A, 50 W • Short-circuit test: 4.5 V, 13.64 A, 30 W Determine th
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Q. A 75-kVA, 230/115-V, 60-Hz transformer was tested with these results: • Open-circuit test: 115 V, 16.3 A, 750 W • Short-circuit test: 9.5 V, 326 A, 1200 W Determine:
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