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When plaster of Paris is slaked in petroleum ________________ is obtained.

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When plaster of Paris is slaked in petroleum ________________ is obtained.

(a) Thistle

(b) Snowcrete

(c) Sirapite

(d) Parian

The question was posed to me during an interview.

My query is from Special Materials for Plastered Surfaces topic in division Pointing and Plastering of Construction & Building Materials

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The correct choice is (c) Sirapite

The best explanation: Sirapite is quickly setting material and produces hard white surface on drying. It is also a better fire resistant material. Thistle hardwall is a product of high grade gypsum and it possesses a high capacity to carry sand.

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