Examkin

Question

Difficulty: MediumCompleting the Passage Logically

Read the passage below and complete the argument logically by providing the missing conclusion in the blank.

Answer:A major commercial airline recently converted its legacy aircraft fleet to operate entirely on 100% synthetic aviation fuel, which contains zero aromatic hydrocarbons, replacing conventional jet fuel. While synthetic fuel burns cleaner and produces lower particulate emissions, the elastomer gaskets in legacy turbine fuel lines specifically require regular contact with aromatic hydrocarbons to maintain a slight physical swelling that prevents fuel line seepage. Because the airline did not add aromatic compounds to the synthetic fuel supply or replace the existing engine gaskets, aviation maintenance analysts concluded that operating the legacy fleet on unblended synthetic fuel will directly result in 【increased fuel leaks due to gasket shrinkage】.

Answer

increased fuel leaks due to gasket shrinkage
The passage establishes two key facts: legacy gaskets need aromatic hydrocarbons to swell and prevent fuel leaks, and the new synthetic fuel lacks these aromatic compounds. Because the airline neither added aromatics nor replaced the gaskets, the gaskets will fail to maintain their swell, directly resulting in fuel line leakage due to gasket shrinkage.

Step-by-Step Solution

1
Identify the core premises provided in the stimulus.
Premise 1: Legacy engine elastomer gaskets require exposure to aromatic hydrocarbons to swell and maintain a leak-free seal. Premise 2: Pure synthetic aviation fuel lacks aromatic hydrocarbons. Premise 3: The airline switched to pure synthetic fuel without adding aromatics or replacing legacy gaskets.
Establishing the precise factual foundation is necessary before drawing a valid logical deduction.
2
Synthesize the premises to determine the necessary physical outcome.
Without aromatic hydrocarbons in the fuel, the elastomer gaskets will lose their required swelling, failing to seal fuel line connections properly.
Combining the requirement of the gaskets with the absence of aromatics in the new fuel directly implies seal breakdown.
3
Formulate the logial completion that directly bridges the premise chain to its missing conclusion.
The operation will lead to increased fuel leakage or fuel system seepage resulting from gasket shrinkage.
The conclusion must follow directly from the premises without introducing unsupported assumptions about extraneous engine failures or economic variables.

Key Concept

Completing a logical passage requires synthesizing facts given in the premises to infer the necessary consequence, avoiding unwarranted assumptions or shifts in scope.
Rate this question

Topics

Completing the Passage Logically

More questions from this topic