A. Decrease its strength and ability to be hardened
B. Decrease its tarnish resistance
C. Increase its fusion temperature
D. Redden the alloy
Related Mcqs:
- Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?
A. Chromium
B. Indium
C. Irridium
D. Palladium - Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?
A. Platinum
B. Copper
C. Silver
D. Gold - The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?
A. 55
B. 65
C. 75
D. 85 - Gold content of an 18 carat alloy is______________?
A. 25%
B. 50%
C. 75%
D. 100% - Percentage of gold in high noble alloy is______________?
A. N 25%
B. 25%
C. >40%
D. 0% - The contraction of gold alloy on solidifying is approximately_____________?
A. 0.4%
B. 1.4%
C. 2.4%
D. 3.4% - 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 - White gold alloy predominantly is______________?
A. Gold added with palladium
B. Gold added with calcium
C. Gold with much of chromium
D. Gold with silver - Brinnel hardness number of a dental gold alloy is directly proportional to its______________?
A. Tensile strength
B. Elongation
C. Modulus of elasticity
D. Modulus of resilience - The stiffness of a dental gold alloy is determined by its________________?
A. Proportional limit
B. Modulus of elasticity
C. Ultimate tensile strength
D. Flow
