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Engineering Materials

Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Nickel
Chromium
Magnesium
Copper

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Engineering Materials
Brass contains

70 - 75% copper and rest tin
85 - 92% copper and rest tin with little lead and nickel
70% copper and 30% zinc
90% copper and 10% tin

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Engineering Materials
In high speed steels, manganese is used to tougher the metal and to increase its

Critical temperature
Hardness
Yield point
Melting point

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Engineering Materials
Malleability of a material can be defined as

Ability to recover its original form
All of these
Ability to undergo large permanent deformations in tension
Ability to undergo large permanent deformations in compression

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Engineering Materials
In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.

Silicon
Sulphur
Manganese
Phosphorus

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Engineering Materials
Super conduction by metals is observed in the temperature range of

Around 0°C
Above 100°K
Below 10°K
Around 100°C

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