Gold content of an 18 carat alloy is______________?

Related Mcqs:

1. Percentage of gold in high noble alloy is______________?

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

2. 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

3. 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

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

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

5. 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

6. 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

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

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

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

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

9. The carat for Au foil used for restorations is_______________?

   A. 18
   B. 20
   C. 22
   D. 24

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

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