1.

To achieve useful strength of the material at temperatures of 1000-1600 ⁰C, what should be the melting point temperature of the material?(a) 1000 ⁰C(b) 1300 ⁰C(c) 1600 ⁰C(d) More than 1600 ⁰C

Answer» The correct option is (d) More than 1600 ⁰C

Best explanation: To achieve useful strengths at the temperatures of 1000-1600 ⁰C, melting points in excess of 1600 ⁰C are required. Most of the materials retain significant strength to approximately 0.5-0.6 of their absolute melting temperature, but for high strength, high melting point temperature is preferred.


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