The purity of gold is expressed in________________?

Related Mcqs:

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

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

2. Shape memory is seen in________________?

   A. Stainless steel wire
   B. NITTINOL wire
   C. TMA wire
   D. Aluminium

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

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

5. Gold content of an 18 carat alloy is______________?

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

6. Percentage of gold in high noble alloy is______________?

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

7. Within an hour after cementation of cast gold onlay patient complains of shooting pain every time the teeth comes together Most probable explanation is ______________?

   A. Supracocclusion of restoration
   B. Retained cement in gingival sulcus
   C. Excess acid in mix
   D. Galvanic current caused by gold onlay occluding with a large restoration

8. 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

9. Which of the following cast gold alloys is used for fabricating partial denture frameworks______________?

   A. Type I – Soft
   B. Type II – Hard
   C. Type III – Hard
   D. Type IV – Extra Hard

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