Related Mcqs:

1. Iron content in Indian iron ore is about _________________ percent?

   A. 80-85
   B. 60-65
   C. 40-45
   D. 20-25

2. Volume of blast furnace slag is about _______________ times the volume of hot metal (pig iron) of the same weight ?

   A. 1.5
   B. 3
   C. 5
   D. 7

3. Limestone is added in the blast furnace (during pig iron manufacture) to______________________?

   A. Form slag by combining with impurities
   B. Supply heat by undergoing exothermic reaction with impurities
   C. Reduce the coke consumption
   D. Reduce slag viscosity

4. Dephosphorization of molten pig iron is favoured by_______________________?

   A. Oxidising and basic slag
   B. Reducing and basic slag
   C. High activity co-efficient of phosphorous in metal
   D. Oxidising and neutral slag

5. Specific gravity of hot metal (pig iron) is ______________ times that of the blast furnace slag ?

   A. 2
   B. 3
   C. 0.8
   D. 6

6. Maximum permissible sulphur content in steel is ______________ percent ?

   A. 0.015
   B. 0.055
   C. 0.505
   D. 0.805

7. Increasing the carbon content of steel_________________?

   A. Reduces the upper shelf energy
   B. Increasing the ductility transition temperature
   C. Decreases brittleness
   D. Decreases hardness

8. Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________?

   A. Lumps
   B. Pellets
   C. Briquettes
   D. Sinter

9. _____________________ of grey cast iron produces white cast iron?

   A. Tempering
   B. Rapid heating
   C. Rapid cooling
   D. Slow cooling

10. Annealing of white cast iron produces _____________________ iron?

    A. Grey
    B. Nodular
    C. Malleable
    D. Spheroidal