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

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. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?

   A. Cresylic acid
   B. Xanthaies
   C. Pine oil
   D. All A, B. & C.

3. Cassiterite is an ore of_________________?

   A. Tin
   B. Lead
   C. Molybdenum
   D. Chromium

4. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?

   A. √T
   B. 1/√P
   C. √y
   D. 1/√ρ

5. Which of the following if present in iron ore, enhances its value ?

   A. Alumina
   B. Alkali oxide
   C. Lime & Magnesia
   D. None of these

6. Which of the following is not categorised as the ore agglomeration process ?

   A. Nodulising
   B. Pelletising
   C. Balling
   D. Briquetting

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

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

8. Annealing of white cast iron produces _____________________ iron?

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

9. ______________________ iron is produced by the annealing of white cast iron?

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

10. Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?

    A. Galvanising
    B. Tinning
    C. Sherardizing
    D. None of these