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Question
Which of the following statement is correct?
Options:
A .  The product produced by blast-furnace is called cast iron
B .  The pig iron is the name given to the product produced by cupola
C .  The cast iron has high tensile strength
D .  The chilled cast iron has no graphite
Answer: Option D
Chilled cast iron. Iron-carbon alloy with low graphitization factor so that chill occurs forming a graphite-free structure.
In order to achieve chilling, the silicon content is set to a low level depending on the wall thickness of the casting; the carbon content is approx. 2.5 to 3.8%.

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