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Which statement about idealisation is TRUE?

  • A.A good idealisation retains every detail of the real structure
  • B.Idealisation always gives conservative results
  • C.Idealisation removes the need to understand the load path
  • D.It preserves what matters, discards the rest

Answer: D

Correct answer: It preserves what matters, discards the rest

That is the whole definition. Retaining every detail would not be an idealisation at all, and would defeat the purpose. Nor is idealisation automatically conservative - discarding a load path can be unconservative if it was carrying load away from the region of interest. And far from removing the need to understand the load path, it requires that understanding, since deciding what to discard is deciding what carries what.

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