The percentage of carbon in pig iron varies from___________________?

Related Mcqs:

1. 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%.

2. Which of the following is mostly used used as blast furnace fuel for extracting pig iron from iron ores?

   A. Brown coal
   B. Anthracite coal
   C. Hard coke
   D. Woodchar coal

   Submitted by: Faheem Zaman Dhaunroo

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

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

4. Sulphur in pig iron tends to make it___________________?

   A. hard’
   B. soft
   C. ductile
   D. tough
   E. malleable

5. Pig iron is the name given to________________?

   A. raw material for blast furnace
   B. product of blast furnace made by reduction of iron ore
   C. iron containing huge quantities of carbon
   D. iron in molten form in the ladles
   E. iron scrap

6. The presence of sulphur in pig iron makes__________________?

   A. it easily machinable
   B. it brittle
   C. it hard
   D. the casting unsound
   E. increases the fluidity

7. 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

8. 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

9. 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

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

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