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[Engineering Version] Daily Question 20180419

2018-04-19View Original

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Before wallpapering, which of the following statements regarding the quality of substrate preparation meets the requirements? (  )   a. Apply water-resistant putty to newly constructed concrete surfaces.   b. On old surfaces, the loose old finishing layers must be removed, and an interface agent should be applied.   c. The moisture content of concrete or plaster bases must not exceed 10%, while that of wooden bases must not exceed 12%.   d. A sealing primer should be applied to the base surface before wallpapering.   e. The moisture content of concrete or plaster bases must not exceed 8%, and that of wooden bases must not exceed 12%. Answer: bde

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