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Engineering Materials

Engineering Materials
The machinability of aluminium increases when _________ is added to aluminium.

Silicon
Magnesium
Lead and bismuth
Copper

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Engineering Materials
Blast furnace produces following by reduction of iron ore

Wrought iron
Malleable iron
Cast iron
Pig iron

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Engineering Materials
Weld decay is the phenomenon found with

Nonferrous materials
Mild steel
Stainless steel
Cast iron

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Engineering Materials
Silicon when added to copper improves

Hardness and strength
Hardness
Strength and ductility
Machinability

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Engineering Materials
Corrosion resistance of steel is increased by addition of

Tungsten, molybdenum, vanadium, chromium
Vanadium, aluminium
Chromium and nickel
Sulphur, phosphorus, lead

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Engineering Materials
Corundum contains more than 95%

SiO2
Al2O3
Steel
MgO

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