White cast iron__________________?

Related Mcqs:

1. Which of the following represents the allotropic forms of iron__________________?

   A. alpha iron, beta iron and gamma iron
   B. alpha iron and beta iron
   C. body centred cubic a-iron and face centred cubic a-iron
   D. alpha iron, gamma from and delta iron
   E. none of the above

2. An important property of malleable cast iron in comparison to grey cast iron is the high___________________?

   A. compressive strength
   B. ductility
   C. carbon content
   D. hardness
   E. surface finish

3. The unique property of cast iron is its high ___________________?

   A. malleability
   B. ductility
   C. surface finish
   D. damping characteristics
   E. hardness

4. In grey cast iron, carbon is present in the form of____________________?

   A. cementite
   B. free carbon
   C. flakes
   D. spheroids
   E. nodular aggregates of graphite

5. Chilled cast iron has____________________?

   A. no graphite
   B. a very high percentage of graphite
   C. a low percentage of graphite
   D. graphite as its basic constituent of composition
   E. none of the above is true

6. White cast iron contains carbon in the form of__________________?

   A. free carbon
   B. graphite
   C. cementite
   D. white carbon
   E. ferrite

7. Cast iron has_________________?

   A. high tensile strength
   B. its elastic limit close to the ultimate breaking strength
   C. high ductility
   D. all of the above
   E. none of the above

8. Grey cast iron_____________________?

   A. contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
   B. is also known as chilled cast iron am is obtained by cooling rapidly. It i: almost unmachinable
   C. is produced by annealing process. I is soft, tough and easily machinec metal
   D. is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroida form and is well dispersed throughout the material
   E. none of the above is true

9. Malleable cast iron _________________?

   A. contains l.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
   B. is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
   C. is produced by annealing process. It is soft, tough, and easily machined metal
   D. is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material
   E. none of the above

10. Ductile cast iron___________________?

    A. contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
    B. is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
    C. is produced by annealing process. It is soft, tough and easily machined metal
    D. is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
    E. none of the above