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

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

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Engineering Materials
Free carbon in iron makes the metal

Soft and gives a fine grained crystalline structure
Soft and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure
Hard and gives a coarse grained crystalline structure

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