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Zorluk: KolayParaphrased Fact Recognition

Read the passage below:

During gas metal arc welding (GMAW), welders rely on shielding gas to protect the molten weld pool from atmospheric contamination, such as oxygen and nitrogen. If these ambient gases penetrate the weld puddle, they create porosity and significantly weaken the joint. To maintain consistent coverage, technicians must set the flow regulator between 25 and 35 cubic feet per hour. Operating below this recommended range leaves the metal vulnerable to oxidation, while excessively high flow rates create turbulence that draws surrounding air into the gas stream. Therefore, proper regulator calibration ensures strong and durable welds.

According to the passage, what happens if the shielding gas rate is set above the recommended level?

  1. A
    Technicians must set the flow regulator between 25 and 35 cubic feet per hour.
  2. B
    Atmospheric oxygen and nitrogen prevent the formation of porosity in the weld puddle.
  3. Turbulent flow pulls environmental atmosphere into the protective gas barrier.Cevap
  4. D
    The welding torch overheats and melts the internal copper contact tip.

Cevap

Turbulent flow pulls environmental atmosphere into the protective gas barrier.
The passage explicitly states that excessively high gas flow rates create turbulence that draws surrounding air into the gas stream. The correct option accurately conveys this fact by restating that turbulent flow pulls environmental atmosphere into the protective gas barrier.

Adım Adım Çözüm

1
Locate the portion of the passage addressing excessive gas flow rates.
Identified the sentence: '...while excessively high flow rates create turbulence that draws surrounding air into the gas stream.'
The question asks specifically about the consequences of exceeding the recommended gas rate.
2
Map key terms to accurate synonymous phrases.
'Excessively high flow rates' maps to 'rate set above the recommended level', 'create turbulence' maps to 'turbulent flow', and 'draws surrounding air into the gas stream' maps to 'pulls environmental atmosphere into the protective gas barrier.'
Paraphrased fact questions require recognizing the same meaning expressed through different vocabulary and sentence structures.
3
Evaluate the answer choices and eliminate distractors.
The statement expressing that turbulent flow pulls environmental atmosphere into the protective gas barrier accurately reflects the text without copying verbatim phrasing.
Distractors feature verbatim copying of irrelevant details, causal reversals, or unsupported outside assertions.

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Paraphrased Fact Recognition
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Paraphrased Fact Recognition

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