A. free carbon
B. graphite
C. cementite
D. white carbon
E. ferrite
Related Mcqs:
- 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 - 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 - 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 - Carbon in iron is an example of__________________?
A. substitutional solution
B. interstitial solid solution
C. intermetallic compounds
D. all of the above
E. none of the above. - In malleable iron, carbon is present in the form of___________________?
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite - The unique property of cast iron is its high ___________________?
A. malleability
B. ductility
C. surface finish
D. damping characteristics
E. hardness - 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 - Annealing of white cast iron results in production of_________________?
A. malleable iron
B. nodular iron
C. spheroidal iron
D. grey iron
E. none of the above - An important property of high silicon (12 – 18%) cast iron is the high__________________?
A. tenacity
B. brittleness
C. plasticity
D. corrosion resistance
E. hardness - 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
