Engineering Materials
Body centered cubic space lattice is found in

Zinc, magnesium, cobalt, cadmium, antimony and bismuth
Gamma iron, aluminium, copper, lead, silver and nickel
None of these
Alpha iron, tungsten, chromium and molybdenum

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

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

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