What is common in amalgam and ceramics ?

Related Mcqs:

1. The opacity in ceramics is achieved by adding_______________?

   A. Boric oxide
   B. Copper oxide
   C. Silica
   D. Titanium oxide

2. Compared with dental alloys, CERAMICS show____________________?

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

3. Ceramics fired to metals are processed by_______________?

   A. Heat pressing
   B. Machining
   C. Sintering
   D. Slip casting

4. Dispersion of crystalline phase to strengthen ceramics results in_________________?

   A. dispersed porcelain
   B. Glazed porcelain
   C. aluminium porcelain
   D. All of the above

5. Apart from composites and ceramics, another material that could be copy milled easily and inexpensively is_________________?

   A. Molybdenum
   B. Germanium
   C. Titanium
   D. Chromium

6. The ADA specification No 1 for composition of amalgam alloy recommends______________?

   A. 65% silver, 32% tin and 3% copper
   B. 49% silver, 32% tin and 19% cooper
   C. 65% silver, 29% tin and 5-6% copper
   D. None of the above

7. Once triturated, the Dental amalgam should be condensed with in_____________?

   A. 5 minutes
   B. 6 minutes
   C. 3 minutes
   D. 15 minutes

8. Gallium and indium added to Amalgam replace______________?

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

9. Amalgam achieves 70% of the strength by____________?

   A. hours
   B. 4 hours
   C. 8 hours
   D. 16 hours

10. Setting time of Amalgam is best controlled by _______________?

    A. Using spherical particles
    B. Lathe cut alloy
    C. Altering Hg-Alloy ratio
    D. Trituration time