Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?

Related Mcqs:

Flux is used during casting to________________?

A. Remove the oxides formed on the gold alloy B. Lower the melting point C. Replace casting wax D. Speed the burnout process...

Heat hardening is the process done at_______________?

A. Heating 750°C and slowly cooling to zero degree B. Heating quickly upto 450°C followed by sudden quenching C. Heating upto 250°C for 15 to 30 min D. Heating at 750°C and then quenching to room temperature...

Which of the following is function of fluoride flux in soldering process ?

A. It prevents the formation of copper oxide B. It prevents the formation of chromium oxide or dissolves chromic oxide layer C. It prevents the flow of material in undesirable area D. Increase the strength of solder...

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...

In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?

A. Improve bonding B. Decrease porosity C. They react with the porcelain opaque layer, which masks the metal D. Improves the thermal expansion between the metal and porcelain...