Addition of large amounts of platinum to a casting gold alloy will________________?

Related Mcqs:

1. 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...

2. Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?

   A. Platinum B. Copper C. Silver D. Gold...

3. 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...

4. Gold content of an 18 carat alloy is______________?

   A. 25% B. 50% C. 75% D. 100%...

5. Percentage of gold in high noble alloy is______________?

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

6. The contraction of gold alloy on solidifying is approximately_____________?

   A. 0.4% B. 1.4% C. 2.4% D. 3.4%...

7. 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...

8. 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...

9. 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...

10. The stiffness of a dental gold alloy is determined by its________________?

    A. Proportional limit B. Modulus of elasticity C. Ultimate tensile strength D. Flow...