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Zorluk: ZorParaphrased Fact Recognition

Continuous welded rail (CWR) requires precise thermal management to prevent dangerous structural distortions. Railroad maintenance crews must anchor the steel tracks at a designated 'neutral temperature'—typically between 95°F and 110°F depending on local climate—where the rail experiences zero internal longitudinal stress. If technicians fasten the fasteners when ambient temperatures are substantially below this neutral threshold, the metal will undergo extreme thermal expansion during hot summer months, generating compressive stresses that can buckle the track outward. Conversely, securing the rails during excessive heat induces tensile stress in freezing winter conditions, risking brittle tensile fractures. Consequently, cold-weather installations require crews to hydraulically stretch the rail before final anchoring to artificially simulate the dimensional geometry of the neutral temperature.

Based on the passage, what procedure must track maintenance workers follow when installing continuous welded rail in cold weather?

  1. A
    Fasten the fasteners immediately to ensure the track experiences zero internal longitudinal stress.
  2. B
    Induce tensile stress across the steel segments to protect the track against cold-weather buckling.
  3. Mechanically elongate the steel track prior to securing it to replicate its dimensions at the stress-free target thermal state.Cevap
  4. D
    Heat the ambient track environment to maintain an exact working threshold between 95°F and 110°F before allowing operations.

Cevap

Maintenance workers must mechanically elongate the steel track prior to securing it to replicate its dimensions at the stress-free target thermal state.
The text explicitly states that low-temperature installations necessitate hydraulically stretching the rail before final anchoring so that it artificially matches the dimensional geometry of the neutral temperature (defined as the point of zero internal longitudinal stress). The correct option restates these exact conditions using precise synonyms ('mechanically elongate', 'prior to securing', and 'stress-free target thermal state') without verbatim copying.

Adım Adım Çözüm

1
Locate the specific detail in the passage addressing installation procedures in cold weather.
Identified the sentence: 'Consequently, cold-weather installations require crews to hydraulically stretch the rail before final anchoring to artificially simulate the dimensional geometry of the neutral temperature.'
The question asks for the specific mandatory action required during low-temperature installation.
2
Analyze the meaning of the key terms and their contextual definitions in the passage.
'Hydraulically stretch' means to mechanically lengthen or elongate; 'before final anchoring' means prior to fastening/securing; 'neutral temperature' is defined as the state of 'zero internal longitudinal stress.'
Paraphrased fact recognition requires translating the author's exact words into synonymous concepts and restructured syntax.
3
Evaluate the answer choices to identify the option that accurately preserves this factual relationship without relying on verbatim traps.
The option stating that technicians mechanically elongate the steel track prior to securing it to replicate its dimensions at the stress-free target thermal state precisely mirrors the source sentence.
This confirms full semantic equivalence without altering causal or quantitative details.

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Paraphrased Fact Recognition
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Paraphrased Fact Recognition

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