A. Chromium
B. Indium
C. Irridium
D. Palladium
Related Mcqs:
- 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 - Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?
A. Platinum
B. Copper
C. Silver
D. Gold - Crucible indicated for casting base metal alloys is______________?
A. Carbon crucible
B. Clay crucible
C. Quartz crucible
D. High melting plastic crucible - 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 - 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 - The deoxidizing agent added to dental alloys is______________?
A. Palladium
B. Silver
C. Copper
D. Zinc - 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 - Compared with dental alloys, CERAMICS show____________________?
A. High ductility
B. High hardness
C. Low esthetic value
D. Susceptibility to brittle fracture - In Base metal alloys, Corrosion resistance occurs due to___________________?
A. Passivity
B. High Fusion Temperature
C. High Molecular Weight
D. Co-efficient of Thermal Expansion - High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?
A. Have less marginal breakdown
B. Are workable at lower Hg-alloy ratio
C. Have a higher ratio of tensile to compressive strength
D. Have less resistance to tarnish and corrosion
