The crystal structure of gamma iron is_________________?

Related Mcqs:

1. 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

2. Gamma iron exits at following temperature___________________?

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

3. The crystal structure of brass is_________________?

   A. F.C.C.
   B. B.C.C.
   C. H.C.P.
   D. Orthorhombic crystalline structure
   E. none of the above

4. The crystal of alpha iron is ____________________?

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

5. 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

6. 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

7. Pure iron is the structure of_______________?

   A. ferrite
   B. pearlite
   C. anstenite
   D. ferrite and cementite
   E. ferrite and pearlite

8. 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

9. Steel made from phosphatic iron is_________________?

   A. brittle
   B. hard
   C. ductile
   D. tough
   E. malleable

10. The metallic structure of mild steel is_________________?

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