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

Related Mcqs:

1. The stiffness of a dental gold alloy is determined by its________________?

   A. Proportional limit
   B. Modulus of elasticity
   C. Ultimate tensile strength
   D. Flow

2. The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its______________?

   A. Resilience
   B. Elastic limit / Elastic strain
   C. Hardness
   D. Fatigue resistance

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

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

4. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?

   A. Have less marginal breakdown
   B. Are workable at lower Hg-alloy ratio
   C. Have a higher ratio of tensile to compressive strength
   D. Have less resistance to tarnish and corrosion

5. Powders of dental plaster and dental stone differ mainly in____________?

   A. Solubility
   B. Shelf life
   C. Chemical formula
   D. Particle porosity

6. The main difference between dental stone and dental plaster is______________?

   A. Chemical composition
   B. Self life
   C. Sharpe and size of particles
   D. Solubility in water

7. The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

   A. 19
   B. 20
   C. 21
   D. 26

8. The higher the Hg alloy ratio in dental amalgam________________?

   A. Higher the strength
   B. Lower the creep value
   C. More matrix matrial formed
   D. More gamma 1 phase formed

9. In non zinc containing dental amalgam alloy the percentage of zinc present is______________?

   A. Less than 0.02%
   B. Less than 0.1%
   C. Less than 0.01%
   D. None of the above

10. The most commonly used Titanium alloy for dental and medical purposes is________________?

    A. Ti 6Al 4V
    B. Ti 5Al 4V
    C. Ti 5Al 5V
    D. Ti 6Al 6V