Austenite is an alloy of iron of and carbon with the iron in______________?
A. Alpha form
B. Beta form
C. Gamma form
D. None of the above
Medical Mcqs
Which zone is the hottest and efficient burning zone of the flame used for casting ?
Which zone is the hottest and efficient burning zone of the flame used for casting ?
A. Oxidizing zone
B. Reducing zone
C. Combustion zone
D. None of the above
Localised shrinkage porosity is seen when there________________?
Localised shrinkage porosity is seen when there________________?
A. Thin sprue
B. No reservoir
C. Investment heated strongly
D. Inadequate air discharge
Sub surface porosity can be decreased by_______________?
Sub surface porosity can be decreased by_______________?
A. Decreasing the sprue length
B. Decreasing the sprue thickness
C. Increasing the melting temperature
D. Increasing the mould temperature
The inlay wax most commonly used for direct technique_____________________?
The inlay wax most commonly used for direct technique_____________________?
A. Type 1
B. Type 2
C. Type 3
D. Type 4
The purity of gold is expressed in________________?
The purity of gold is expressed in________________?
A. Carats
B. Percentage
C. Fineness
D. Gram
In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?
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
Investment material used for cobalt-chromium alloys is_____________?
Investment material used for cobalt-chromium alloys is_____________?
A. Gypsum bonded
B. Phosphate bonded
C. Silica bonded
D. None of the above
Silica sol__________________?
Silica sol__________________?
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
Boxing wax is also called as________________?
Boxing wax is also called as________________?
A. Carding wax
B. Inlay wax
C. Utility wax
D. Sticky wax