Cobalt-Chrominum alloys contains_______________?

Related Mcqs:

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

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

2. The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?

   A. More
   B. Less
   C. Equal
   D. Depends on the alloy type

3. A sporangium contains_______________?

   A. Spherules
   B. porangiospores
   C. Chlamydospores
   D. Oidia

4. 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

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. Microstructure of cobalt chromium alloy in cast condition is______________?

   A. Fibrous
   B. Homogeneous
   C. Inhomogenous
   D. amorphous

7. Crucible indicated for casting base metal alloys is______________?

   A. Carbon crucible
   B. Clay crucible
   C. Quartz crucible
   D. High melting plastic crucible

8. The term ordered hardening heat treatment used in which of the following dental alloys ?

   A. Gold-Copper
   B. Nickel-Chromium
   C. Nickel-Titanium
   D. Silver-Palladium

9. The linear solidification shrinkage of Type IV Ni-Cr based alloys is_______________?

   A. 2.3%
   B. 1.56%
   C. 1.37%
   D. 3%

10. 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