1.

Which of the following materials has superior strength and rigidity at high elevated temperature?(a) Aluminium-based alloys(b) Copper-based alloys(c) Zinc-based alloys(d) Nickel-based alloys

Answer» Right answer is (d) Nickel-based alloys

Explanation: In the high temperature technology, the need for materials with superior strength, ductility and rigidity has been growing. Nickel-based alloys are the most widely used materials at the high elevated temperature, and super-alloys of it, are the greatest in the mechanical properties.


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