Q207
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.
A.
Cementite
B.
Free graphite
AnswerC.
Both A and B
D.
None of these
Answer: Option B
Solution
Answer: Option B
Solution:
When filing or machining cast iron makes our hands black, then it shows that free graphite is present in cast iron.