Engineering Materials
Addition of lead and bismuth to aluminium results in

Improvement of casting characteristics
Improving machinability
One of the best known age and precipitation hardening systems
Improvement of corrosion resistance

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP