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

Related Mcqs:

1. 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

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

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

3. Compressive strength of grey cast iron in tonnes/cm is of the order of___________________?

   A. 3- 5
   B. 5-7
   C. 7-10
   D. 10-15
   E. 15-22

4. The percentage of carbon in grey iron castings usually varies between __________________?

   A. 0.5 to 1%
   B. 1 – 2%
   C. 2.5 to 4.5%
   D. 5 – 7%
   E. 7-9%.

5. In malleable iron, carbon is present in the form of___________________?

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

6. In mottled cast iron, carbon is available in__________________?

   A. free form
   B. combined form
   C. nodular form
   D. flat form
   E. partly in free and partly in combined state

7. 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

8. 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

9. 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

10. 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