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

Related Mcqs:

1. 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

2. 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

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. An important property of high silicon (12 – 18%) cast iron is the high__________________?

   A. tenacity
   B. brittleness
   C. plasticity
   D. corrosion resistance
   E. hardness

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

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

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. 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%.

9. 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

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

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