Earing is a defect found in steels after the following metal working operation ?

Related Mcqs:

1. Often earing defects are found during deep drawing operation, because the __________________?

   A. Surface finish of the sheet is poor
   B. Sheet material has been given substantial spring back
   C. Starting sheet has planer anisotropy due to its texture
   D. Starting sheet has normal anisotropy due to its texture

2. Steels with high carbon equivalent have poor Weldability, because in these steels during welding________________?

   A. Carbon and other alloying elements get oxidised from the weld pool
   B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
   C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
   D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of
   the weld

3. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?

   A. V/A
   B. V/A2
   C. V2/A
   D. V2/A2

4. The mechanism involved in the removal of metal in drilling operation is by_________________?

   A. Compression
   B. Extrusion
   C. Shearing
   D. Both B & C

5. Strain hardening effect in a metal subjected to cold working is due to the ______________ mechanism?

   A. Fracture
   B. Dislocation
   C. Slip
   D. Twinning

6. With increase in annealing temperature, the following defect density decreases?

   A. Vacancy
   B. Dislocation
   C. Grain boundary
   D. All of these

7. Machinability of hard alloys and tool steels is improved by_____________________?

   A. Spheroidising
   B. Annealing
   C. Tempering
   D. Normalising

8. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

   A. Tempering
   B. Hardening
   C. Annealing
   D. Normalising

9. Fine grained steels have____________________?

   A. High brittleness
   B. Higher tendency to distort
   C. High ductility
   D. None of these

10. Most important property of steels for use in automobile bodies is the___________________?

    A. Formability
    B. Yield strength
    C. Toughness
    D. Resilience