AST Surgical Technologist Practice Exam 2025 – Complete All-in-One Guide for Exam Success

Question: 1 / 400

Plaster rolls for casting should be submerged in which of the following?

Cold water

Hot water

Room temperature water

Lukewarm water

Plaster rolls for casting should be submerged in lukewarm water because this temperature facilitates an appropriate reaction for the plaster to set correctly. Lukewarm water ensures that the plaster absorbs water at a controlled rate, allowing for an even and consistent hydration. This is critical because if the water is too cold, the plaster may not mix properly and could lead to longer setting times and weakened structure. Conversely, if the water is too hot, it could cause the plaster to set too rapidly, potentially compromising the integrity of the cast and increasing the risk of burns or injuries to the skin. Room temperature water may not provide the optimal conditions for effective plaster application. By using lukewarm water, the saturation process is balanced, leading to a properly hardened cast that maintains its intended strength and form.

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