Delta iron occurs at temperature of_______________?

Related Mcqs:

1. 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

2. Pure iron is the structure of_______________?

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

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. 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

6. Delta metal is an alloy of__________________?

   A. copper, zinc and iron
   B. iron, nickel and copper
   C. iron, lead and tin
   D. iron, aluminium and magnesium
   E. copper, zinc and antimony

7. Ferromagnetic alpha iron exists in temperature range of________________?

   A. below 723°C
   B. 770 – 910°C
   C. 910-1440°C
   D. 1400-1539°C
   E. above 1539°C

8. At very low temperature, the melting and boiling temperatures become equal. This temperature is____________________?

   A. 373°K
   B. 273.16°K
   C. 303°K
   D. 0°K.
   E. 300°K

9. A cold chisel is made of_______________?

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

10. Railway rails are normally made of_______________?

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