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___________ are polymerized to strong solids to be used as binders.

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in Foundry and Forging by (110k points)
___________ are polymerized to strong solids to be used as binders.

(a) Bentonite

(b) Fire Clay

(c) Epoxy Resins

(d) Phenol Formaldehyde

This question was posed to me in semester exam.

My query is from Binders and its Applications topic in division Casting Processes of Foundry and Forging

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Right choice is (d) Phenol Formaldehyde

To explain: Phenol Formaldehyde is synthetic resins which are thermosetting. They are dry powder or liquid. They are heated to get excellent binding properties.

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