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Zorluk: ZorResolving Paradoxes and Discrepancies

Five years ago, a commercial airline began applying a newly developed synthetic hydrophobic coating to the exterior fuselages of its aircraft. Wind-tunnel tests and flight logs under controlled conditions confirmed that the coating reduced aerodynamic drag, allowing engines to burn 8 percent less fuel per mile flown compared to untreated aircraft. Surprisingly, however, over the five-year period following the fleet-wide application, the airline's average fuel consumption per flight hour across its standard domestic routes actually increased, even though flight speeds, flight altitudes, and fuel prices remained unchanged. Which of the following, if true, most helps to resolve the apparent discrepancy described above?

  1. A
    The airline expanded its domestic route network over the five-year period, resulting in a 20 percent increase in the total number of flights operated annually.
  2. B
    Engine modifications made to the fleet during the same period improved overall fuel combustion efficiency by an additional 3 percent.
  3. Routine exposure to standard de-icing chemicals used during winter operations chemically altered the coating, causing its surface to become significantly rougher than standard untreated metal.Cevap
  4. D
    Most competing domestic airlines chose not to adopt the synthetic coating due to the high upfront capital cost of specialized application equipment.
  5. E
    The protective hydrophobic coating required periodic washing every six months to clear accumulated dust and environmental debris.

Cevap

Routine exposure to standard de-icing chemicals used during winter operations chemically altered the coating, causing its surface to become significantly rougher than standard untreated metal.
The correct answer identifies a key difference between controlled testing conditions and actual routine operational conditions. While the coating successfully reduces drag under test conditions, exposure to de-icing fluids during regular operations causes the coating to degrade into a surface rougher than standard untreated metal. This accounts for both the initial test results and the observed increase in fuel burn per flight hour during actual service.

Adım Adım Çözüm

1
Identify the two contradictory facts in the stimulus.
Fact 1: Controlled tests show the synthetic coating reduces drag and fuel burn by 8 percent per mile. Fact 2: In real-world domestic operations, average fuel consumption per flight hour increased.
Resolving a paradox requires finding an explanation that allows both statements to be completely true simultaneously.
2
Evaluate how real-world operational conditions differ from controlled testing environments.
Controlled tests evaluate pristine coatings under ideal conditions, whereas real-world domestic flights expose aircraft to operational elements like de-icing chemicals.
An operational difference that degrades performance below baseline level can account for the net increase in hourly fuel consumption.
3
Select the choice that reconciles both facts without denying either premise.
The option describing chemical alteration from de-icing explains why controlled tests showed savings while actual routine flights experienced increased drag and fuel burn.
This provides a mechanism for why the coating became rougher than untreated metal during real-world use.

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Resolving Paradoxes and Discrepancies
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Resolving Paradoxes and Discrepancies

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