Q.

The metal used for making air crafts and rockets is –

A. Lead
B. Aluminium
C. Nickel
D. Copper
Answer» C. Nickel
Explanation: Nickel-based super alloys are an unusual class of metallic materials with an exceptional combination of high temperature strength, toughness, and resistance to degradation in corrosive or oxidizing environment. These materials are widely used in aircraft and power-generation turbines, rocket engines, etc.
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