Microstructure of cobalt chromium alloy in cast condition is______________?

Related Mcqs:

1. All of the following statements about cast cobalt alloy are true EXCEPT_____________?

   A. They have a modulus of elasticity twice that of gold alloys
   B. They are more rigid than gold alloys
   C. They have higher ductility than gold alloys
   D. They have a lower proportional limit than gold alloys

2. Investment material used for cobalt-chromium alloys is_____________?

   A. Gypsum bonded
   B. Phosphate bonded
   C. Silica bonded
   D. None of the above

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. Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?

   A. Accelerated corrosion
   B. Fracture of the restoration
   C. Merginal damage
   D. All of the above

5. Resistance to corrosion in a cobalt-chrome casting is due to presence of_______________?

   A. High quality iron
   B. Chrome
   C. Cobalt
   D. Nickel

6. Cobalt-Chrominum alloys contains_______________?

   A. 30% cobalt and 60% chrominum
   B. 60% cobalt and 30% chrominum
   C. 1% palladium
   D. 20% gold

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

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

8. Gold content of an 18 carat alloy is______________?

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

9. Percentage of gold in high noble alloy is______________?

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

10. 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