A. Boric acid
A. Borax
B. Fluoride
C. Rouge
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 - 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 fuel gases used for soldering, has the highest heat content______________?
A. Hydrogen
B. Natural gas
C. Acetylene
D. Propane - During soldering, the solidus temperature of the filler material should be_____________?
A. Greater than the substrate material
B. Lesser than the substrate material
C. Equal to the substrate material
D. Temperature not relevant - Which of the following fuel gases is the best choice of heat source to carry out soldering process ?
A. Propane
B. Acetylene
C. Natural gas
D. Hydrogen - Linear coefficient of thermal expansion of metal used for metal caramic restoration range from________________?
A. 11.5-12.5×10-6/°C
B. 10.5-11.5×10-6/°C
C. 13.5-14.5×10-6/°C
D. 16.5-17.5×10-6/°C - Crucible indicated for casting base metal alloys is______________?
A. Carbon crucible
B. Clay crucible
C. Quartz crucible
D. High melting plastic crucible - Which of the following increases castability of base metal alloys________________?
A. Tin
B. Beryllium
C. Molybdenum
D. Carbon - 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 - Advantage of titanium over other base metal alloys_______________?
A. Low weight
B. Low cost
C. Low strength
D. Low melting point
