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
High temperature and low strain rates favour brittle fracture
Cup and cone formation is characteristic for brittle materials

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Engineering Materials
The charge of the blast furnace consists of

Calcined ore (1 part), coke (8 parts) and limestone (4 parts)
Calcined ore (8 parts), coke (4 parts) and limestone (1 part)
Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
Calcined ore, coke and limestone all in equal parts

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