Formation of white crystalline substance which appears on the surface due to the presence of salts in materials used for making plaster is called as __________(a) Cracking(b) Crystallisation(c) Efflorescence(d) CrazingI had been asked this question by my college professor while I was bunking the class.My question comes from Terminology Used in Plastering Work in division Pointing and Plastering of Construction & Building Materials

Formation of white crystalline substance which appears on the surface

1.	Formation of white crystalline substance which appears on the surface due to the presence of salts in materials used for making plaster is called as __________(a) Cracking(b) Crystallisation(c) Efflorescence(d) CrazingI had been asked this question by my college professor while I was bunking the class.My question comes from Terminology Used in Plastering Work in division Pointing and Plastering of Construction & Building Materials
Answer» RIGHT choice is (c) Efflorescence The explanation is: FORMATION of white crystalline substance that appears on the surface due to the presence of SALTS in materials used for making plaster is called efflorescence. It results in a very poor and unpleasing appearance. It can be removed by washing the surface repeatedly.

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