Wrought iron is________________?

Related Mcqs:

1. Pick up wrong statement about wrought iron ?

   A. It contains carbon of the order of 0 to 0.25%
   B. It melts at 1535°C
   C. It is very soft and ductile
   D. It can be easily forge welded
   E. It is made by adding suitable percent¬age of carbon to molten iron and subjecting the product to repeated hammering and rolling

2. Which is the false statement about wrought iron. It has________________?

   A. high resistance to rusting and corrosion
   B. high ductility
   C. ability of hold protective coating
   D. easily weldable characteristics
   E. uniform strength in all directions

3. The tensile strength of wrought iron is maximum _________________?

   A. along the lines of slag distribution
   B. perpendicular to lines of slag distribution
   C. uniform in all directions
   D. unpredictable
   E. none of the above

4. 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

5. 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

6. 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

7. 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

8. For the allotropic forms of iron, the points of arrest are __________________?

   A. the points where no further change oc-curs
   B. constant for all metals
   C. the points where there is no further flow of metal
   D. the points of discontinuity
   E. the points where major changes take place

9. Iron is ____________________?

   A. paramagnetic
   B. ferromagnetic
   C. ferroelectric
   D. dielectric
   E. none of the above

10. Pure iron is the structure of_______________?

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