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Zorluk: ZorParaphrased Fact Recognition

In non-destructive eddy current testing of aluminum aircraft skins, an alternating magnetic field from a test coil induces circular electrical currents within the conductive substrate. When an internal fatigue fissure disrupts these circulating flow paths, the local electrical impedance shifts, registering as an amplitude alteration on the technician's display. Because high-frequency electromagnetic fields experience rapid attenuation near the metal surface due to skin effect, lower inspection frequencies must be calibrated to detect deeper structural flaws beneath the outer fuselage layer.

According to the passage, which of the following is true regarding eddy current testing procedures?

  1. A
    Sudden fluctuations in electrical impedance directly generate internal fatigue fissures across the conductive substrate.
  2. B
    High-frequency electromagnetic fields are calibrated to detect deeper structural flaws beneath the outer fuselage layer.
  3. Identifying subsurface structural flaws requires tuning the test equipment to reduced electromagnetic frequencies.Cevap
  4. D
    Technicians must immediately replace the entire aluminum fuselage skin whenever any shift in signal amplitude appears.

Cevap

Identifying subsurface structural flaws requires tuning the test equipment to reduced electromagnetic frequencies.
The passage explicitly notes that because high-frequency signals weaken near the surface, lower frequencies must be calibrated to locate deeper structural defects. The choice stating that finding subsurface flaws requires adjusting the apparatus to reduced electromagnetic frequencies is an accurate semantic paraphrase of this detail.

Adım Adım Çözüm

1
Isolate the target factual query in the stem
The goal is to find a statement strictly confirmed by the passage regarding eddy current testing parameters.
Paraphrased fact questions require verifying specific textual details rather than overarching themes or outside assumptions.
2
Locate the relevant operational detail in the passage
The passage specifies that 'lower inspection frequencies must be calibrated to detect deeper structural flaws beneath the outer fuselage layer.'
This establishes the exact condition required for finding subsurface defects.
3
Evaluate the answer choices against semantic meaning and distractor traps
The statement expressing that discovering deeper imperfections requires setting lower signal frequencies accurately restates the source fact through synonym substitution ('reduced electromagnetic frequencies' for 'lower inspection frequencies' and 'subsurface structural flaws' for 'deeper structural flaws beneath the outer fuselage layer').
Accurate paraphrase questions avoid verbatim duplication while retaining exact logical and factual equivalency.

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Paraphrased Fact Recognition
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Paraphrased Fact Recognition

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