Pure iron is the structure of_______________?

Related Mcqs:

1. Delta iron occurs at temperature of_______________?

   A. room temperature
   B. above melting point
   C. between 1400°C and 1539°C
   D. between 910°C and 1400°C
   E. none of the above

2. 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

3. 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

4. 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

5. The crystal structure of gamma iron is_________________?

   A. body centred cubic
   B. face centred cubic
   C. hexagonal close packed
   D. cubic structure
   E. orthorhombic crystal

6. 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

7. Specific weight of sea water is more that of pure water because it contains_________________?

   A. dissolved air
   B. dissolved salt
   C. suspended matter
   D. all of the above
   E. heavy water

8. A cold chisel is made of_______________?

   A. mild steel
   B. cast iron
   C. H.S.S.
   D. high carbon
   E. german silver

9. Railway rails are normally made of_______________?

   A. mild steel
   B. alloy steel
   C. high carbon
   D. tungsten steel
   E. cast iron steel

10. The number of electrons in 1 cm3 of metal would be of the order of_______________?

    A. 1010
    B. TO16
    C. 1022
    D. 1040
    E. 1052