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

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. Wrought iron is________________?

   A. hard
   B. high in strength
   C. highly resistant to corrosion
   D. heat treated to change its properties
   E. least resistant to corrosion

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. Which is false statement about tempering. Tempering is done to_______________?

   A. improve machinability
   B. improve ductility
   C. improve toughness
   D. release stresses
   E. reduce hardness and brittleness

9. Which is false statement about case hardening. Case hardening is done by_______________?

   A. electroplating
   B. cyaniding
   C. induction hardening
   D. nitriding
   E. flame hardening

10. Which is false statement about properties of aluminium ___________________?

    A. modulus of elasticity is fairly low
    B. wear resistance is very good
    C. fatigue strength is not high
    D. creep strength limits its use to fairly low temperatures
    E. corrosion resistance is good