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Malleable cast iron | |
A. | contains lv7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron [Wrong Answer] |
B. | is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable [Wrong Answer] |
C. | is produced by annealing process. It is soft, tough, and easily machined metal [Correct Answer] |
D. | 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 [Wrong Answer] |
E. | none of the above. [Wrong Answer] |