Question

Choose the correct sequence of using plaster of paris in mold making
(A) Mixing plaster with water and pour
(B) Apply a release agent to model
(C) Allow plaster to set
(D) Prepare the model and attach the cottle
(E) Remove the model
Choose the correct answer from the options given below:

• A. (E), (A), (B), (C), (D)
• B. (A), (B), (C), (D), (E)
• C. (A), (C), (B), (D), (E)
• D. (C), (B), (D), (A), (E)

Hint:

The process for plaster of Paris mold making is: Mix → Apply release agent → Set plaster → Attach cottle → Remove model.

Answer 1

The Correct Option is B

Step 1: Mold-Making Process Overview.
The process commences with the preparation of plaster and water, followed by pouring (A). Subsequently, a release agent is applied to the model (B) to prevent adhesion. The plaster is then allowed to set (C). Following this, the model is prepared and the cottle is attached (D). The final action involves removing the model (E) once the plaster has completely set.
Step 2: Sequence Analysis.
- (1) (E), (A), (B), (C), (D): This sequence is incorrect because model removal (E) should be the final step.
- (2) (A), (B), (C), (D), (E): This is the correct sequential order of operations.
- (3) (A), (C), (B), (D), (E): This sequence is incorrect as the release agent application (B) must precede plaster setting (C).
- (4) (C), (B), (D), (A), (E): This sequence is incorrect due to an erroneous arrangement of steps.
Step 3: Determination of Correct Sequence.
The accurate sequence of steps is (A), (B), (C), (D), (E), which corresponds to option (2).