Which is the purest form of iron ?

Related Mcqs:

1. ______________ iron is produced, when molten pig iron is allowed to cool gradually?

   A. White cast
   B. Grey cast
   C. Wrought
   D. None of these

2. White cast iron as compared to grey cast iron is ________________?

   A. More durable
   B. Very brittle
   C. Very hard
   D. All A., B. & C.

3. _____________ iron is produced, when molten pig iron is chilled suddenly?

   A. White cast
   B. Grey cast
   C. Wrought
   D. None of these

4. The impure iron (pig iron) that is tapped out from blast furnace contains about _____________ percent carbon?

   A. 0.2
   B. 2
   C. 4
   D. 8

5. Containers made of high silicon cast iron (14% Si) are not suitable for the storage of ____________________?

   A. Acetic acid
   B. Benzoic & boric acids
   C. Phosphoric acid (95%) & sulphuric acid (95%)
   D. Hydrochloric acid (concentrated)

6. Cast iron detachable joint is used in __________ pipes.

   A. Steel
   B. Cast iron
   C. Asbestos cement
   D. Reinforced cement concrete

7. Chilled iron castings are__________________?

   A. Easily machinable
   B. Soft on surface
   C. Highly wear resistant
   D. None of these

8. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?

   A. Silicon
   B. Phosphorus
   C. Sulphur
   D. None of these

9. Iron rust is_________________?

   A. Ferrous oxide
   B. Hydrated ferric oxide
   C. Powdered iron
   D. Ferric sulphide

10. Silicon percentage in acid resistant cast iron is about________________?

    A. 4
    B. 8
    C. 14
    D. 20