Technicians at an optical manufacturing facility polished high-grade quartz lenses using a cerium oxide slurry chilled to sixty degrees Fahrenheit. During an extended production run, the refrigeration unit cycling rate slowed, and the slurry temperature climbed steadily throughout the afternoon. Operators noted an increase in surface friction across the polishing pads. Final inspection at the end of the shift revealed that all finished lenses exhibited perimeter micro-fractures.
Based on the passage, what most likely led to the structural damage on the finished lenses?
- AThe development of perimeter micro-fractures produced elevated friction against the polishing pads.
- BThe cerium oxide slurry was continuously chilled to sixty degrees Fahrenheit throughout the entire run.
- Inadequate slurry cooling allowed excessive friction and thermal stress to build during the polishing process.Cevap
- DTechnicians mixed an incorrect chemical concentration of cerium oxide before the shift began.
Cevap
Inadequate slurry cooling allowed excessive friction and thermal stress to build during the polishing process.
The passage establishes that the refrigeration system slowed down, which allowed the slurry to warm up and caused friction between the lenses and polishing pads to rise. This sequence of events directly implies that the failure to keep the slurry cool led to high friction and thermal stress, which resulted in the perimeter micro-fractures found during final inspection.
Adım Adım Çözüm
Anahtar Kavram
Recognizing unstated causal links between environmental conditions and material outcomes in technical passages.