1.

Which of the following pattern-materials are used in Precision Casting? 1. Plaster of Paris 2. Plastics 3. Anodized aluminium alloy 4. Frozen mercury Select the correct answer using the codes given below: Codes:

A. 1 and 2
B. 2 and 4
C. 3 and 4
D. 1 and 3
Answer» B. 2 and 4


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