Passage:
Before welding cast iron engine components, mechanics preheat the metal and place the finished piece into insulated sand to cool slowly over several hours. Rapid temperature drops cause cast iron to contract unevenly, forming micro-cracks along the weld seam.
Statement: Allowing a welded cast iron component to cool rapidly compromises the structural strength of the repair.
Cevap: Cevap
Cevap
True
The statement is true because the passage indicates that rapid temperature drops produce micro-cracks along the seam, which logically means the strength of the weld is compromised.
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Anahtar Kavram
Deducing unstated physical consequences from passage evidence
Tahmini Süre:45s