high compressive strength

excellent machinability

good casting characteristic

all of these

equal to

less than

more than

none of the above

makes the iron soft and easily machinable

increases hardness and brittleness

makes the iron white and hard

aids fusibility and fluidity

makes the iron soft and easily machinable

increases hardness and brittleness

makes the iron white and hard

aids fusibility and fluidity

by adding magnesium to molten cast iron

by quick cooling of molten cast iron

from white cast iron by annealing process

none of the these