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Q: Manufacturing of cast iron is done by remelting of coke and lime stone with______.
  • A. Iron
  • B. Pig iron
  • C. wrought iron
  • D. cast iron
Correct Answer: Option B - Cast Iron is obtained from the pig-iron which is re-melted with coke and limestone. Pig iron is nothing but impure iron which is obtained from the iron ore– • Cast iron has lot of engineering properties. So that, it can be used in many way like- for sanitary fitting, rail chairs, casting molds etc. Cast Iron is place in cupola furnace. Types of Cast Iron– • Grey Cast Iron • Malleable Cast Iron • White Cast Iron • Toughened Cast Iron It contains 2-5% carbon along with traces of other impurities like Sulphur, Phosphorus and Maganese etc. • Cast Iron is brittle and having good casting characteristics. • High wear and compressive strength. • Tensile strength – 100 to 200 MPa • Compressive strength – 400 to 1000 MPa • Shear strength – 120 MPa
B. Cast Iron is obtained from the pig-iron which is re-melted with coke and limestone. Pig iron is nothing but impure iron which is obtained from the iron ore– • Cast iron has lot of engineering properties. So that, it can be used in many way like- for sanitary fitting, rail chairs, casting molds etc. Cast Iron is place in cupola furnace. Types of Cast Iron– • Grey Cast Iron • Malleable Cast Iron • White Cast Iron • Toughened Cast Iron It contains 2-5% carbon along with traces of other impurities like Sulphur, Phosphorus and Maganese etc. • Cast Iron is brittle and having good casting characteristics. • High wear and compressive strength. • Tensile strength – 100 to 200 MPa • Compressive strength – 400 to 1000 MPa • Shear strength – 120 MPa

Explanations:

Cast Iron is obtained from the pig-iron which is re-melted with coke and limestone. Pig iron is nothing but impure iron which is obtained from the iron ore– • Cast iron has lot of engineering properties. So that, it can be used in many way like- for sanitary fitting, rail chairs, casting molds etc. Cast Iron is place in cupola furnace. Types of Cast Iron– • Grey Cast Iron • Malleable Cast Iron • White Cast Iron • Toughened Cast Iron It contains 2-5% carbon along with traces of other impurities like Sulphur, Phosphorus and Maganese etc. • Cast Iron is brittle and having good casting characteristics. • High wear and compressive strength. • Tensile strength – 100 to 200 MPa • Compressive strength – 400 to 1000 MPa • Shear strength – 120 MPa