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State whether the following is true or false.
Efflorescence indicates a serious structural defect in every case.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: C

It is normally a surface blemish caused by water movement and evaporation. It does show that water is passing through the concrete, which may be worth investigating for other reasons. Persistent efflorescence often points to a leak somewhere.

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