The rapid decrease in tensile strength and increase in ductility of a wrought metal is seen in which stage of annealing ?

Related Mcqs:

1. Materials which has high compressive strength and low tensile strength is classified with property of________________?

   A. Ductility
   B. Brittleness
   C. Malleability
   D. Resilient

2. For dental amalgam, the elastic modulus and tensile strength is______________?

   A. 40 Gpa and 60 – 100 Mpa
   B. 21 Gpa and 27 – 55 Mpa
   C. 350 Gpa and 10 – 120 Mpa
   D. 360 Gpa and 125 – 130 Mpa

3. Ultimate tensile strength refers to_________________?

   A. Stress before rupture
   B. Stress after rupture
   C. Longitudinal compressive strength
   D. Horizontal compressive strength

4. Brazilian test is used to determine the ultimates tensile strength of_________________?

   A. Ductile materials
   B. Flexible materials
   C. Brittle materials
   D. Malleable materials

5. Hardness number which does not depend on the ductility of metal_____________?

   A. KNH
   B. VHN
   C. RHN
   D. BHN

6. Ductility of a material is a measure of it’s_______________?

   A. Grain elongation
   B. Anealing
   C. Cold working
   D. Work hardening

7. The imperfection seen on the lingual flange of a lower denture caused by rapid heating during a curing cycle is called_____________?

   A. Localised Shrinkage porosity
   B. Gas inclusion porosity
   C. Micro porosity
   D. Surface porosity

8. Annealing is also known as_______________?

   A. Soft hardening treatment
   B. Hard hardening treatment
   C. Precipitating heat treatment
   D. Stress relieving heat treatment

9. Stages of annealing in order_________________?

   A. Recovery recrystallization grain growth
   B. Recrystallization recovery, grain growth
   C. Grain Growth Recrystallization recovery
   D. Melting point, grain growth, Recrystallization

10. Nickel is added to wrought gold alloys as______________?

    A. Strengtherner
    B. Hardener
    C. Whitens the alloy
    D. Scavenger