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Zorluk: OrtaExplicit Detail Retrieval

In a 2015 study of late nineteenth-century subterranean urban rail ventilation in London, engineering historian Arthur Pendelton examined the mechanical air-shafts constructed along the Metropolitan District Railway. Pendelton documented that while early steam locomotives relied primarily on passive chimney flues to vent sulfurous emissions, the 1883 introduction of powered fan impellers at the Charing Cross station reduced localized carbon monoxide concentrations by thirty-four percent. However, Pendelton emphasized that this installation was restricted exclusively to below-grade platforms and was not deployed within the connecting passenger concourses. Furthermore, despite contemporaneous claims by railway directors that the impellers operated continuously, maintenance logs revealed that power to the ventilation turbines was routinely suspended during non-peak overnight hours to conserve coal reserves.

Consider each of the choices separately and select all that apply.
Which of the following statements regarding the 1883 ventilation impellers at Charing Cross station is explicitly supported by Pendelton's findings?

  1. They contributed to a quantified decrease in carbon monoxide concentrations on subterranean station platforms.Cevap
  2. B
    They were integrated into both below-grade platforms and adjoining passenger concourses.
  3. Their power supply was routinely interrupted during overnight non-peak hours.Cevap

Cevap

The supported statements are that the impellers contributed to a quantified decrease in carbon monoxide concentrations on subterranean platforms and that their power supply was routinely interrupted during overnight non-peak hours.
According to the passage, the 1883 powered fan impellers at Charing Cross station reduced localized carbon monoxide concentrations on below-grade platforms by thirty-four percent and had their turbine power routinely suspended during non-peak overnight hours to conserve coal. Thus, both the statement concerning a quantified decrease in carbon monoxide on platforms and the statement regarding routine overnight power suspensions are explicitly supported.

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1
Locate explicit passage statements regarding the operational effects and deployment scope of the 1883 fan impellers.
The text confirms that the impellers reduced carbon monoxide levels by 34% on platforms, were restricted exclusively to below-grade platforms, and had turbine power routinely suspended overnight.
Explicit detail retrieval requires matching exact factual claims presented in the text.
2
Evaluate each choice against the retrieved passage facts.
The option describing a quantified decrease in carbon monoxide matches the 34% reduction fact. The option describing overnight power interruptions matches the routine suspension in maintenance logs. The option claiming deployment in passenger concourses directly contradicts the passage's explicit restriction.
Only options directly supported by explicit text evidence should be selected.

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