A. 9-20% copper
B. 13-20% copper
C. 9-30% copper
D. 13-30% copper
Related Mcqs:
- The percentage of copper in high copper alloy is______________?
A. 10-12%
B. 0-6%
C. 13-30%
D. 20-30% - 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 - 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 - 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 - Copper content in low copper amalgam is________________?
A. 6%
B. 12-30%
C. 29%
D. 19% - 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 - Percentage of tin in low copper alloy is______________?
A. 30-35%
B. 26-28%
C. 13-32%
D. 22-30% - Imbilical cord contains_________________?
A. Three arteries and one vein
B. One artery and three veins
C. One artery and one vein
D. Two arteries and one vein - 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 - 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
