45) When filing or machining cast iron makes our hands black, then it shows that______ is present in cast iron
Answer is:
free graphite
Related Engineering Materials MCQ with Answers
Answer is:
Phosphorus
Explanation:
Phosphorus is the impurity in cast iron which promotes graphite nodule formation and increases the fluidity of the molten metal.
Answer is:
both A and B
Explanation:
Blackheart cast iron and Whiteheart cast iron has similar properties to steel.