Consider the following ingredients used in moulding: 1. Dry silica sand 2. Clay 3. Phenol formaldehyde 4. Sodium silicate Those used for shell mould casting include:

Consider the following ingredients used in moulding: 1. Dry silica san

1.	Consider the following ingredients used in moulding: 1. Dry silica sand 2. Clay 3. Phenol formaldehyde 4. Sodium silicate Those used for shell mould casting include:
A.	1, 2 and 4
B.	2, 3 and 4
C.	1 and 3
D.	1, 2, 3 and 4
Answer» D. 1, 2, 3 and 4

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Consider the following ingredients used in moulding: 1. Dry silica sand 2. Clay 3. Phenol formaldehyde 4. Sodium silicate Those used for shell mould casting include:

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