The deoxidizing agent added to dental alloys is______________?

Related Mcqs:

1. 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

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

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

3. The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?

   A. More
   B. Less
   C. Equal
   D. Depends on the alloy type

4. Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?

   A. Platinum
   B. Copper
   C. Silver
   D. Gold

5. The term ordered hardening heat treatment used in which of the following dental alloys ?

   A. Gold-Copper
   B. Nickel-Chromium
   C. Nickel-Titanium
   D. Silver-Palladium

6. Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?

   A. Chromium
   B. Indium
   C. Irridium
   D. Palladium

7. Compared with dental alloys, CERAMICS show____________________?

   A. High ductility
   B. High hardness
   C. Low esthetic value
   D. Susceptibility to brittle fracture

8. 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

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

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

10. Nickel is added to wrought gold alloys as______________?

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