Maximum percentage of carbon in ferrite 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. Maximum percentage of carbon in austenite is______________?

   A. 0.025%
   B. 0.26%
   C. 0.8%
   D. 1.25%
   E. 1.7%.

3. 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%.

4. 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%.

5. 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%.

6. For burning 1 kg of carbon to CO as per chemically correct combusiton, amount of air required is___________________?

   A. 1 kg
   B. 4/3kg
   C. 8/3kg
   D. 2 kg
   E. 16/3 kg

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 malleable iron, carbon is present in the form of___________________?

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

9. 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

10. The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?

    A. decrease
    B. increase
    C. remain constant
    D. first increase and then decrease
    E. first decrease and then increase