Engineering Materials MCQ with Answers

Engineering Materials MCQ with Answers

41) When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces

Answer is:

alloy cast iron

Explanation:

When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces alloy cast iron.

42) The addition of magnesium to cast iron increases its

Answer is:

ductility and strength in tension

43) which of the following impurity in cast iron makes it hard and brittle?

Answer is:

Sulphur

44) Grey cast iron has

Answer is:

carbon in the form of free graphite

45) When filing or machining cast iron makes our hands black, then it shows that______ is present in cast iron

Answer is:

free graphite

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