A. Prolonged heating:
B. Rapid heating me
C. Water film contamination
D. Too high pressure during casting
Fins and spines on the casting is seen due to_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. More
B. Less
C. Equal
D. Depends on the alloy type
A. Passivity
B. High Fusion Temperature
C. High Molecular Weight
D. Co-efficient of Thermal Expansion
In Base metal alloys, Corrosion resistance occurs due to___________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Boric acid
A. Borax
B. Fluoride
C. Rouge
The solvent flux used for base metal soldering is_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Greater than the substrate material
B. Lesser than the substrate material
C. Equal to the substrate material
D. Temperature not relevant
During soldering, the solidus temperature of the filler material should be_____________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Tin
B. Beryllium
C. Molybdenum
D. Carbon
Which of the following increases castability of base metal alloys________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Hydrogen
B. Natural gas
C. Acetylene
D. Propane
A. Magnesium oxide & Phosphate
B. Magnesium oxide & Phosphoric acid
C. Magnesium oxide & Monoammonium phosphate
D. Magnesium oxide & Ortho Phosphoric acid
Binder in phosphate bonded investment is______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Iridium
B. Ruthinium
C. Indium
D. Platinum
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
