1.

Which of the following should be added to the plaster of Paris in order to increase its setting time?(a) Alum(b) Potassium sulphate(c) Potassium nitrate(d) Citric acidThis question was posed to me in exam.This intriguing question comes from Miscellaneous Materials in portion Miscellaneous Materials, Plain and Reinforced Cement Concrete of Construction & Building Materials

Answer»

The correct choice is (d) Citric ACID

To explain I would say: To increase the setting TIME of the plaster of Paris, suitable retarders are added in it. Citric acid, clay, gum, glue, starch, etc. are all examples of such retarders.



Discussion

No Comment Found

Related InterviewSolutions