The percentage of copper in high copper alloy is______________?

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. Percentage of tin in low copper alloy is______________?

   A. 30-35% B. 26-28% C. 13-32% D. 22-30%...

3. 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...

4. Percentage of gold in high noble alloy is______________?

   A. N 25% B. 25% C. >40% D. 0%...

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. Admixed high copper alloy powder contains_________________?

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

7. 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...

8. Copper content in low copper amalgam is________________?

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

9. Which of the following statement is true regarding lathe cut low Copper silver alloy ?

   A. Requires least amount of mercury B. Achieves high compressive strength at 1 hr. C. Has tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloys D. Has lower cree value...

10. 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...