RDA Practice Exam – California RDA Test Prep & Free Practice Test (2025)

Question: 1 / 400

How long should you wait before separating a model from the impression?

15-30 minutes

40-60 minutes

After taking an impression of a model, the recommended time to wait before separating the model is 40-60 minutes. This allows the impression to fully set and prevents distortion of the model when it is removed. Option A of 15-30 minutes may not be long enough for the impression to fully set. Option C of 1-2 hours may be too long, and the impression may become difficult to remove. Option D of immediately is not recommended as it may cause distortion of the impression and affect the accuracy of the model.

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1-2 hours

Immediately

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