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Difficulty: HardParaphrased Fact Recognition

Read the following passage:

During the case-hardening of heavy-duty transmission gears, low-carbon steel blanks undergo gas carburizing inside a sealed, high-temperature furnace. Carbon monoxide gas dissociates at the steel surface at temperatures exceeding 900°C, allowing carbon atoms to diffuse into the outer crystalline lattice. This enrichment increases the carbon content of the gear's outer perimeter while preserving the ductile, low-carbon core. Consequently, after quenching, the gear develops a wear-resistant exterior shell capable of enduring extreme tooth-contact stresses without becoming brittle enough to fracture under sudden shock loads.

Statement: According to the passage, the gas carburizing process ensures that the interior section of the gear retains its flexibility to withstand sudden impact forces.

Answer: Answer

Answer

True
The statement is true because the passage directly asserts that the carburizing process increases surface carbon while 'preserving the ductile, low-carbon core' so that the gear does not 'fracture under sudden shock loads.' The statement faithfully paraphrases this fact by stating that the interior section retains flexibility to resist impact forces.

Step-by-Step Solution

1
Locate the specific detail in the passage regarding the interior structure and performance of the gear.
The text states that the process operates 'while preserving the ductile, low-carbon core' to prevent the gear from becoming 'brittle enough to fracture under sudden shock loads.'
Paraphrased fact recognition requires finding the exact factual claim in the text before evaluating restatements.
2
Map the vocabulary and syntax of the statement to the corresponding passage excerpts.
'Interior section' corresponds to 'core', 'retains its flexibility' corresponds to 'preserving the ductile', and 'withstand sudden impact forces' corresponds to 'without becoming brittle enough to fracture under sudden shock loads.'
Identifying accurate synonyms and structural rewrites validates that the statement preserves the passage's true meaning.
3
Evaluate whether the statement introduces distortions, unsupported claims, or contradictions.
No distortions or outside assumptions are present; the statement is an exact semantic equivalent of the author's stated fact.
Confirming the absence of scope shifts ensures the factual assertion is strictly supported.

Key Concept

Paraphrased Fact Recognition
Estimated Time:1m 15s
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Paraphrased Fact Recognition

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