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Core oil and binders change their chemical properties at what temperature?(a) 200°F – 300°F(b) 300°F – 400°F(c) 400°F – 500°F(d) 500°F – 600°F |
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Answer» Right option is (c) 400°F – 500°F To explain I would say: Whenever any material is heated to a temperature high for its properties, there is a change in its chemical and physical aspects seen. Core oils and organic binders used in backing the core, change their physical properties at 400°F – 500°F. |
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