Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?

Related Mcqs:

1. Cavo surface angle for amalgam resoration is butt joint as____________?

   A. It increases compresssive and tensile strengths
   B. Decreased compressive, increased strength
   C. Decreased compressive, decrease tensile strength
   D. Increased compressive, increased tensile strength

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

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

3. 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

4. How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?

   A. 24 hours
   B. 1-2 days
   C. 3-5 days
   D. 7 days

5. Which of the following silver amalgam alloy have the maximum strength________________?

   A. Lathe cut
   B. Spherical
   C. Admixed
   D. Single composition

6. Which of the following are characteristic feature of high copper amalgam alloy ?

   A. Low compressive strength
   B. High marginal breakdown
   C. Less marginal #
   D. High creep

7. In amalgam alloy which acts as oxygen scavenger_____________?

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

8. Which of the following constituents of amalgam alloy decreases expansion____________?

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

9. The largest component of amalgam alloy is_____________?

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

10. 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