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Zorluk: OrtaImplicit Main Idea

Read the passage below:

When thousands of tons of concrete are poured into massive foundations, the chemical hydration of cement generates immense internal heat that cannot dissipate naturally through thick outer walls. While the exterior surface cools against ambient air, the trapped core temperature can exceed 150 degrees Fahrenheit. This steep temperature differential creates severe internal stresses that lead to deep structural fractures. Engineers therefore embed networks of thin metal tubing throughout the pour, pumping refrigerated water continuously through the interior until the entire mass stabilizes at a uniform temperature.

Which of the following best expresses the author's primary point?

  1. A
    Modern civil engineering projects rely primarily on refrigeration equipment to solve environmental construction challenges.
  2. B
    The chemical hydration of cement causes core temperatures in large pours to exceed 150 degrees Fahrenheit.
  3. Regulating internal temperature differentials during concrete curing is essential to prevent structural cracking in massive pours.Cevap
  4. D
    Pouring concrete in sub-freezing ambient temperatures eliminates the risk of internal thermal fractures.

Cevap

Regulating internal temperature differentials during concrete curing is essential to prevent structural cracking in massive pours.
The author outlines how heat from chemical hydration creates severe temperature differentials that crack large concrete structures, and explains why engineers must actively circulate refrigerated water through embedded tubing. Synthesizing the problem and its solution demonstrates that active temperature regulation during curing is critical to maintaining structural integrity in massive concrete projects.

Adım Adım Çözüm

1
Identify the primary topic and supporting facts
The text discusses how cement hydration generates trapped core heat, creating a wide temperature gap with the cooling surface that causes structural fractures.
Isolating the core problem and supporting details establishes the factual basis needed to uncover the unstated main idea.
2
Examine the relationship between the problem and the described engineering response
Engineers install embedded cooling pipes with refrigerated water to equalize temperatures across the entire concrete mass.
Connecting the structural threat directly to the required technical solution reveals why the author wrote the passage.
3
Synthesize the implied thesis statement
The overarching message is that active internal cooling during concrete curing is necessary to avoid catastrophic cracking in large-scale structures.
An implicit main idea must combine the cause, the hazard, and the corrective action into a comprehensive central takeaway.

Anahtar Kavram

Synthesizing an unstated central message from supporting premises and solutions
Tahmini Süre:1m 0s
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Implicit Main Idea

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