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

Related Mcqs:

1. Which of the following hardness test is a micro hardness test ?

   A. Brinnel
   B. Knoop
   C. Shore-A
   D. Rockwell

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

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

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

   A. Recovery stage
   B. Recrystallisation stage
   C. Grain growth stage
   D. All of the above

4. A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?

   A. Viscoelastic
   B. Pseudoplastic
   C. Plastic
   D. Newtonian

5. The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?

   A. 50 – 60 KHN
   B. 25 – 35 KHN
   C. 15 – 20 KHN
   D. 40 – 48 KHN

6. In measuring Vickers hardness no. Which of the following is used________________?

   A. Spherical indenter
   B. Steel ball indentation
   C. Rhomboid shaped indenter
   D. 136-degree diamond pyramid

7. Brinnel hardness number of a dental gold alloy is directly proportional to its______________?

   A. Tensile strength
   B. Elongation
   C. Modulus of elasticity
   D. Modulus of resilience

8. By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________?

   A. Ag
   B. Zn
   C. Cu
   D. Hg

9. The relative hardness of elastomere is determined using________________?

   A. Rockwell tester
   B. Barcol indenter
   C. Knoop pyramid
   D. Shore durometer

10. Hardness of fully mineralized cementum is_____________?

    A. Less than dentin
    B. More than dentin
    C. Equal dentin
    D. None of the above