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20. The brittleness and hardness of cast iron are mainly controlled by the presence in it and it is magnetic below 200°C, it is called: A. Y B. & C. Fe₂C D. Pearlite 21. It is formed when steel contains carbon up to 1.8% at 1130°C. On cooling below 723°C, it starts transforming into pearlite and ferrite. It's called: A. Austenite 22. B. Ferrite C. Cementite D. Pearlite contains very little or no carbon in iron. It is the name given to pure iron crystals which are soft and ductile. B. Ferrite A. Austenite C. Cementite D. Pearlite

20. The brittleness and hardness of cast iron are mainly controlled by the presence in it and it is magnetic below 200°C, it is called: A. Y B. & C. Fe₂C D. Pearlite 21. It is formed when steel contains carbon up to 1.8% at 1130°C. On cooling below 723°C, it starts transforming into pearlite and ferrite. It's called: A. Austenite 22. B. Ferrite C. Cementite D. Pearlite contains very little or no carbon in iron. It is the name given to pure iron crystals which are soft and ductile. B. Ferrite A. Austenite C. Cementite D. Pearlite

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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20. The brittleness and hardness of cast iron are mainly controlled by the presence in it and it is magnetic below 200°C, it is called: A. Y B. & C. Fe₂C D. Pearlite 21. It is formed when steel contains carbon up to 1.8% at 1130°C. On cooling below 723°C, it starts transforming into pearlite and ferrite. It's called: A. Austenite 22. B. Ferrite C. Cementite D. Pearlite contains very little or no carbon in iron. It is the name given to pure iron crystals which are soft and ductile. B. Ferrite A. Austenite C. Cementite D. Pearlite
Transcribed Image Text:20. The brittleness and hardness of cast iron are mainly controlled by the presence in it and it is magnetic below 200°C, it is called: A. Y B. & C. Fe₂C D. Pearlite 21. It is formed when steel contains carbon up to 1.8% at 1130°C. On cooling below 723°C, it starts transforming into pearlite and ferrite. It's called: A. Austenite 22. B. Ferrite C. Cementite D. Pearlite contains very little or no carbon in iron. It is the name given to pure iron crystals which are soft and ductile. B. Ferrite A. Austenite C. Cementite D. Pearlite
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