Maximum percentage of carbon in austenite is______________?

Related Mcqs:

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

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

2. Austenite rs a combination of_________________?

   A. ferrite and cementite
   B. cementite and gamma iron
   C. ferrite and austenite
   D. ferrite and iron graphite
   E. pearlite and ferrite

3. Maximum percentage of carbon in ferrite is___________________?

   A. 0.025%
   B. 0.06%
   C. 0.1%
   D. 0.25%
   E. 0.8%.

4. High carbon steel carries carbon %age c_________________?

   A. 0.1 to 0.3%
   B. 0.3 to 0.6%
   C. 0.6 to 0.8%
   D. 0.8 to 1.5%
   E. 1.5 to 2.5%.

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. 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%.

7. In the case of petrol engine at maximum output, the percentage of CO in exhaust gases is ____________________?

   A. Zero
   B. 5-10%
   C. Depends on load and quality of fuel
   D. Considerable percent

8. 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

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

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

10. 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.