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Difficulty: MediumDrawing Logical Conclusions

In large grain storage silos, dormant wheat naturally respires, producing minor amounts of metabolic heat and humidity. When internal grain temperature rises above 30°C, fungal activity accelerates, initiating a compounding heat cycle that destroys the grain. Facility managers utilize embedded sensor cables to track internal temperatures and engage ventilation fans exclusively when outdoor ambient air has lower temperature and humidity than the grain mass. Operating the ventilation fans during damp or warm atmospheric conditions draws external moisture into the silo, accelerating spoilage.

Based on the passage, which of the following conclusions is most logically supported?

  1. A
    Installing additional ventilation fans allows facility managers to eliminate all natural wheat respiration.
  2. Activating aeration fans to cool overheating grain can accelerate spoilage if ambient weather conditions are unfavorable.Answer
  3. C
    Embedded sensor cables directly regulate internal humidity to keep silo temperatures strictly below 30°C.
  4. D
    Applying chemical desiccant powders is necessary to protect wheat from insect infestations during storage.

Answer

Activating aeration fans to cool overheating grain can accelerate spoilage if ambient weather conditions are unfavorable.
The passage explains that grain heating above 30°C requires cooling, but fan operation must occur only when outdoor air is cooler and drier than the grain mass. If fans are run during warm or damp conditions, external moisture is pulled in, accelerating spoilage. Therefore, it is logically concluded that attempting to cool the grain via aeration when outside weather is unfavorable will worsen spoilage instead of resolving it.

Step-by-Step Solution

1
Analyze the conditions governing grain deterioration and cooling in the passage.
The text states that temperatures above 30°C accelerate fungal spoilage, but running fans during warm or damp weather draws moisture inside and hastens spoilage.
Understanding the interaction between internal heating and external air quality is necessary to evaluate the outcome of ventilation.
2
Synthesize the logical consequence of using aeration fans when ambient weather is unsuitable.
Even if grain is overheating and requires cooling, running fans when outside air is warm or damp will worsen spoilage rather than fix it.
Drawing a logical conclusion requires combining the need for cooling with the environmental limitation stated in the text.
3
Evaluate the choices to identify the supported deduction and eliminate unsupported claims.
The statement regarding the risk of worsening spoilage under unfavorable ambient conditions is strictly justified by the text.
Ensures the selected conclusion does not rely on verbatim traps, unsupported assumptions, or outside knowledge.

Key Concept

Drawing logical deductions by synthesizing stated constraints and causal relationships from a passage.
Estimated Time:1m 0s
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Drawing Logical Conclusions

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