A. 0.5 to 1%
B. 1 – 2%
C. 2.5 to 4.5%
D. 5 – 7%
E. 7-9%.
Related Mcqs:
- 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%. - 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 - The percentage of carbon in low carbon steel is__________________?
A. 0.05%
B. 0.15%
C. 0.3%
D. 0.5%
E. 0.7%. - 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 - 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 - 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 - In malleable iron, carbon is present in the form of___________________?
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite - 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 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
