The setting of zinc phosphate is accelerated by_____________?
Correct answer: A. Adding a drop of water
- A. Adding a drop of water
- B. Increasing mixing time
- C. Cooling the slab
- D. Adding a drop of oleic acid
Explanation
A small amount of water accelerates zinc phosphate cement setting by promoting ionization of the phosphoric acid. Cooling the slab is used to prolong working time, while longer mixing generally delays setting rather than accelerating it.
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