Engineering Materials

191. White metal contains

1. 63 to 67% nickel and 30% copper
2. 88% copper and 10% tin and rest zinc
3. alloy of tin, lead and cadmium
4. silver and chromium
5. malleable cast iron and silver.

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192. Wrought iron is

1. hard
2. high in strength
3. highly resistant to corrosion
4. heat treated to change its properties
5. least resistant to corrosion.

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