Engineering Materials
Which is false statement about annealing? Annealing is done to

Soften material
Improve machining characteristic
Relieve stresses
Harden steel slightly

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

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

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