Which of the following statement is true about brittle fracture?

Which of the following statement is true about brittle fracture?

a) High temperature and low strain rates favour brittle fracture

b) Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

c) Brittle fracture is always preceded by noise

d) Cup and cone formation is characteristic for brittle materials

Engineering Materials Practice Set-4