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Asbestos in a building becomes an air quality hazard principally when

  • A.Humidity rises
  • B.The material is disturbed, damaged or deteriorating
  • C.It is sealed inside a wall cavity
  • D.The building is heated

Answer: B

Intact bonded asbestos releases very few fibres, so undisturbed material in good condition is usually managed in place. Drilling, sanding or demolition is what releases respirable fibres, which is why removal is a controlled operation.

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