A. Alpha form
B. Beta form
C. Gamma form
D. None of the above
Austenite is an alloy of iron of and carbon with the iron in______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Oxidizing zone
B. Reducing zone
C. Combustion zone
D. None of the above
Which zone is the hottest and efficient burning zone of the flame used for casting ? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Thin sprue
B. No reservoir
C. Investment heated strongly
D. Inadequate air discharge
Localised shrinkage porosity is seen when there________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Decreasing the sprue length
B. Decreasing the sprue thickness
C. Increasing the melting temperature
D. Increasing the mould temperature
Sub surface porosity can be decreased by_______________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Type 1
B. Type 2
C. Type 3
D. Type 4
The inlay wax most commonly used for direct technique_____________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Carats
B. Percentage
C. Fineness
D. Gram
The purity of gold is expressed in________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy 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
A. Gypsum bonded
B. Phosphate bonded
C. Silica bonded
D. None of the above
Investment material used for cobalt-chromium alloys is_____________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Is applied to the walls of the investment to produce hygroscopic expansion
B. Increase the strength and the setting expansion of the phosphate-bonded investment
C. Acts as a retarder in the silica bonded investments
D. Acts as a refractory in the Silica bonded investments
Silica sol__________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy A. Carding wax
B. Inlay wax
C. Utility wax
D. Sticky wax
Boxing wax is also called as________________? Read More »
Dental Materials, Medical Mcqs, Metallurgy