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

Related Mcqs:

1. Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?

   A. It has increased tensile and compressive strength
   B. It has poor tarnish and corrosion resistance
   C. It’s edge strength is greater
   D. Mercury content in the final restoration is less

2. Which phase provides maximum strength in hardened mercury/silver alloy ?

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

3. Increase in the residual mercury in silver amalgam filling can_____________?

   A. Cause fracture of the filling
   B. Tarnish and corrosion
   C. Increase the strength
   D. Decrease condensation pressure

4. The tarnished layer of silver amalgam consists of________________?

   A. Sulphides of silver
   B. Oxides of tin
   C. Chlorides of tin
   D. All of the above

5. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?

   A. 80 Mpa
   B. 140 Mpa
   C. 260 Mpa
   D. 510 Mpa

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

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

8. 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

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

   A. Accelerated corrosion
   B. Fracture of the restoration
   C. Merginal damage
   D. All of the above

10. The largest component of amalgam alloy is_____________?

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