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Question

Aluminium alloys are widely used in aircraft and ships because of :

A
their high melting point
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B
their hardness
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C
their high density
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D
their light weight
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Solution

The correct option is D their light weight
Aluminium is ductile, malleable and lightweight, and has one third the density and stiffness of steel. It is easily machined, cast, drawn and extruded. Aluminium with magnesium alloy is used to make body of aircraft which is lightweight and resistant to corrosion.

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