White gold alloy predominantly is______________?

Related Mcqs:

1. Gold content of an 18 carat alloy is______________?

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

2. Percentage of gold in high noble alloy is______________?

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

3. 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

4. In type II gold alloys _______ Karat gold is used?

   A. 24 K
   B. 22 K
   C. 18 K
   D. 10 K

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

   A. Decrease its strength and ability to be hardened
   B. Decrease its tarnish resistance
   C. Increase its fusion temperature
   D. Redden the alloy

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

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

7. 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

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

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

9. 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

10. The yield strength of AUstenite (NiTi alloy) is______________?

    A. 100 Mpa
    B. 240 Mpa
    C. 560 Mpa
    D. 700 Mpa