When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.
a) Cementite
b) Free graphite
c) Both ‘a’ and ‘b’
d) None of these
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.
a) Cementite
b) Free graphite
c) Both ‘a’ and ‘b’
d) None of these
