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Which of the following is not used as binders for mould materials?(a) Bentonite(b) Kaolinite(c) Backelite(d) Illite |
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Answer» The correct answer is (c) Backelite Explanation: Backelite is a material which increases hardness beyond a limit which is acceptable for mold materials as well as its deformation takes place too early as plastic deformation. Hence, it is not used as a binder. |
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