High copper amalgam can be produced_____________?

Related Mcqs:

1. Copper content in low copper amalgam is________________?

   A. 6%
   B. 12-30%
   C. 29%
   D. 19%

2. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?

   A. Have less marginal breakdown
   B. Are workable at lower Hg-alloy ratio
   C. Have a higher ratio of tensile to compressive strength
   D. Have less resistance to tarnish and corrosion

3. In a high copper amalgam the phase, which is eliminated is_______________?

   A. Gamma 1
   B. Gamma 2
   C. Gamma 1 and 2
   D. No phase is eliminated

4. Which of the following does not occur in High Copper Amalgam ?

   A. Electrochemical Corrosion
   B. Chemical Corrosion
   C. Penetrating Corrosion
   D. Corrosion does not occur at all

5. 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

6. 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

7. The percentage of copper in high copper alloy is______________?

   A. 10-12%
   B. 0-6%
   C. 13-30%
   D. 20-30%

8. High strength amalgam is achieved by_____________?

   A. Maximum matrix and minimum alloy phase
   B. Minimum matrix and maximum alloy phase
   C. Maximum matrix phase
   D. Minimum alloy phase

9. 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

10. Admixed high copper alloy powder contains_________________?

    A. 9-20% copper
    B. 13-20% copper
    C. 9-30% copper
    D. 13-30% copper