Engineering Materials
Malleable cast iron

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

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Pick up wrong statement about wrought iron

It contains carbon of the order of 0 to 0.25%
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It is very soft and ductile
It melts at 1535°C

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

The brown smoke does not occur during the operation of a Bessemer converter
Silicon and manganese has burnt and carbon has started oxidizing
Air is burning out silicon and manganese
The converter must be titled to remove the contents of the converter

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Engineering Materials