Carbon in iron is an example of__________________?

Related Mcqs:

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

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

2. The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is _______________?

   A. 770°C B. 910°C C. 1050°C D. below recrystallisation temperature E. above recrystallization temperature...

3. 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...

4. Paramagnetic alpha iron changes to gamma iron at_______________?

   A. 770°C B. 910°C C. 1440°C D. 1539°C E. none of the above...

5. 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%....

6. 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...

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

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

8. 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...

9. The percentage of carbon in pig iron varies from___________________?

   A. 0.1 to 1.2% B. 1.5 to 2.5% C. 2.5 to 4% D. 4 to 4.5% E. 4.5 to 6.3%....

10. The percentage of carbon in low carbon steel is__________________?

    A. 0.05% B. 0.15% C. 0.3% D. 0.5% E. 0.7%....