Engineering Materials
Which of the following statement is true about brittle fracture?

Brittle fracture is always preceded by noise
Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Cup and cone formation is characteristic for brittle materials
High temperature and low strain rates favour brittle fracture

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Engineering Materials
Pick up wrong statement about wrought iron

It is very soft and ductile
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It melts at 1535°C
It contains carbon of the order of 0 to 0.25%

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