Which one of the following elements is NOT added is small amount to be used as grain refiners ?

Related Mcqs:

1. 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

2. Quartz in investment material is added for_______________?

   A. Strength
   B. Expansion components for casting shrinkage
   C. Decrease strength
   D. Contraction

3. The deoxidizing agent added to dental alloys is______________?

   A. Palladium
   B. Silver
   C. Copper
   D. Zinc

4. Quartz is added to gypsum bonded investment to______________?

   A. Increase the strength
   B. Counter balance contraction of gypsum during heating
   C. aid in hygroscopic expansion
   D. Increase the shelf life of investment

5. Nickel is added to wrought gold alloys as______________?

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

6. In porcelain metal elements are embedded in the matrix of________________?

   A. Rubber matrix
   B. Glass
   C. Plastic
   D. Resin matrix

7. Gallium and indium added to Amalgam replace______________?

   A. Silver
   B. Tin
   C. Mercury
   D. Zinc

8. Modiffiers are added to gypsum mainly to_______________?

   A. Modify setting time
   B. Modify setting expansion
   C. Modify strength
   D. Decrease the porosity

9. Lenolin is added is ZOE paste to______________?

   A. Decrease flow
   B. Increase flow
   C. Accelerate reaction
   D. Decrease irritation due to eugenol

10. Hydroquinone is added to methyl methacrylate monomer_________________?

    A. To prevent polymerization during storage
    B. To initiate release of free radicalls
    C. To enable polymerization reaction at room temperature
    D. All of the above