A. At right angle
B. At 45°C angle
C. At obtuse angle
D. It depend upon type of wax pattern
The sprue in wax pattern should be placed________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. 25%
B. 50%
C. 75%
D. 100%
Gold content of an 18 carat alloy is______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Under vacuum in argon atmosphere
B. Under air pressure in nitrogen atmosphere
C. In specially fabricated aluminium vanadium
D. Using CAD-CAM technique
Titanium casting is done_____________? Read More »
Dental Materials, Medical Mcqs, Metallurgy 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
Heat hardening is the process done at_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Carbon crucible
B. Clay crucible
C. Quartz crucible
D. High melting plastic crucible
Crucible indicated for casting base metal alloys is______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Quartz
B. Cristobalite
C. Tridymite
D. Corundum
A. Cr, Al, Ti
B. Cr, Mo, Ti
C. Cr, Gold, Ti
D. Cr, Fe, Ti
Passivating alloys are_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Primary impression
B. Corrective impressions
C. Impression of single tooth
D. None of the above
Waxes are used for_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Copper cynide
B. Ionic copper
C. Acidic copper sulfate
D. Silver cyanide
A common electrolyte used for plating copper indirect dies is_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. To strength amalgam
B. In orthodontic wires
C. To construct clasps for partial dentures
D. To replace internal gold restorations
Stainless steel is used mostly in dentistry_________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy