Engineering Materials
The machinability of steel is increased by

Phosphorous, lead and sulphur
Silicon and sulphur
Sulphur, graphite and aluminium
Phosphorous and aluminium

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Engineering Materials
Pick up wrong statement about wrought iron

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

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