The tensile strength of wrought iron is maximum _________________?

Related Mcqs:

1. The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will _________________?

   A. increase
   B. decrease
   C. remain same
   D. first increase and then decrease
   E. show unpredictable behaviour

2. 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

3. 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

4. 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

5. The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?

   A. decrease
   B. increase
   C. remain constant
   D. first increase and then decrease
   E. first decrease and then increase

6. Tensile strength of steel can be safely in-creased by________________?

   A. adding carbon up to 2.8%
   B. adding carbon up to 6.3%
   C. adding carbon up to 0.83%
   D. adding small quantities of copper
   E. adding copper and carbon

7. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?

   A. hysteresis
   B. creep
   C. visco elasticity
   D. Boeschinger effect
   E. inelasticity

8. Compressive strength of grey cast iron in tonnes/cm is of the order of___________________?

   A. 3- 5
   B. 5-7
   C. 7-10
   D. 10-15
   E. 15-22

9. 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

10. 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