Engineering Materials
Grey cast iron

Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material
Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
Is produced by annealing process. I is soft, tough and easily machined metal
Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Dow metal contains

90% aluminium and 90% copper
90% magnesium and 9% aluminium with some copper
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Engineering Materials