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Zorluk: OrtaSequential Detail Extraction

Before conducting an ultrasonic inspection of an aircraft's main landing gear assembly, technicians must follow a precise preparation routine. First, wipe down the strut surface with an approved solvent degreaser to remove foreign debris. After the solvent fully evaporates, apply a uniform layer of acoustic couplant gel directly over the inspection zone. Once the couplant is spread evenly, calibrate the ultrasonic transducer against the reference test block. Only after completing this calibration may the technician begin scanning the strut for subsurface structural cracks.

According to the passage, which action must a technician perform immediately before calibrating the ultrasonic transducer?

  1. A
    Wipe down the strut surface with an approved solvent degreaser
  2. Apply and evenly spread a layer of acoustic couplant gelCevap
  3. C
    Scan the landing gear strut for subsurface structural cracks
  4. D
    Wait for the acoustic couplant gel to completely evaporate

Cevap

Applying and evenly spreading a layer of acoustic couplant gel directly precedes calibrating the ultrasonic transducer.
The passage establishes a direct chronological link between spreading the couplant gel and calibrating the transducer through the temporal cue 'Once the couplant is spread evenly, calibrate the ultrasonic transducer.' Therefore, applying and spreading the acoustic couplant gel is the exact action performed immediately prior to calibration.

Adım Adım Çözüm

1
Identify the target event in the question stem.
The question asks for the action occurring immediately prior to 'calibrating the ultrasonic transducer.'
Establishing the anchor point in the chronological sequence ensures accurate extraction.
2
Trace the chronological sequence outlined in the passage.
Order: 1. Wipe strut with solvent; 2. Solvent evaporates; 3. Apply and spread acoustic couplant gel; 4. Calibrate transducer against test block; 5. Scan strut for subsurface cracks.
Mapping the sequential transition markers ('First', 'After', 'Once', 'Only after') resolves the exact order of operations.
3
Isolate the immediate precursor to the calibration step.
Applying and spreading the couplant gel leads directly into calibration ('Once the couplant is spread evenly, calibrate the ultrasonic transducer').
Matches the specific requirement of sequential detail extraction without confusing earlier or subsequent stages.

Anahtar Kavram

Sequential Detail Extraction
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Sequential Detail Extraction

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