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Engineering Materials

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

Nickel
Chromium
Copper
Magnesium

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Engineering Materials
The aluminium alloy, mainly used, for anodized utensil manufacture, is

Y-alloy
Duralumin
Magnalium
Hindalium

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Engineering Materials
Sulphur in steel

Decreases tensile strength and hardness
Acts as deoxidiser
Reduces the grain size
Lowers the toughness and transverse ductility

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Engineering Materials
Recrystallization temperature can be lowered by

Purification of metal
Working at lower temperature
Grain refinement
All of these

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Engineering Materials
Constantan an alloy used in thermocouples is an alloy of

Copper and zinc
Copper and nickel
Copper and tin
Copper and iron

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Engineering Materials
In which of the following cases, consideration of creep is important

Cast iron pipes
Cycle chains
Flywheel of steam engine
Gas turbine blades

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