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________________ is used as a final coat for surfaces of X-Ray rooms.(a) Gypsum plaster(b) Barium plaster(c) Granite plaster(d) Marble plasterI got this question in exam.I would like to ask this question from Special Materials for Plastered Surfaces in section Pointing and Plastering of Construction & Building Materials

Answer»

The CORRECT CHOICE is (b) Barium plaster

Explanation: Barium plaster is USED as a final coat for surfaces of X-Ray room so as to protect the person working in and around X-Ray ROOMS. It is essentially made from Barium sulphate.



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