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A metal silo compared with a concrete silo typically has

  • A.Greater resistance to fire
  • B.Cheap but thermally responsive
  • C.Higher cost and slower erection
  • D.Better insulation

Answer: B

Thin steel follows the outside temperature closely, which promotes condensation on the inner surface and moisture migration within the bulk. Concrete's thermal mass evens the swings but costs considerably more to build.

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