High strength amalgam is achieved by_____________?

Related Mcqs:

1. For dental amalgam, the elastic modulus and tensile strength is______________?

   A. 40 Gpa and 60 – 100 Mpa
   B. 21 Gpa and 27 – 55 Mpa
   C. 350 Gpa and 10 – 120 Mpa
   D. 360 Gpa and 125 – 130 Mpa

2. The effect of trituration on strength in an amalgam restoration depends on______________?

   A. Amalgam alloy
   B. Trituration time
   C. Speed of amalgamator
   D. All of the above

3. Amalgam achieves 70% of the strength by____________?

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

4. Amalgam achieves 70% of the strength by____________?

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

5. By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________?

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

6. 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

7. Materials which has high compressive strength and low tensile strength is classified with property of________________?

   A. Ductility
   B. Brittleness
   C. Malleability
   D. Resilient

8. High copper amalgam can be produced_____________?

   A. From smooth atomized particles
   B. From irregular and spherical particles
   C. From lathe cut particles
   D. From traditional alloy particles

9. 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

10. Which is not true about high copper amalgam alloys______________?

    A. Low tensile and compressive strength
    B. Low Hg: Alloy ratio
    C. High tensile strength
    D. Low creep