Engineering Materials
Bell metal contains

70 - 75% copper and rest tin
85 - 92% copper and rest tin with little lead and nickel
70% copper and 30% zinc
90% copper and 10% tin

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

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
Brittle fracture is always preceded by noise

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