Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Metallurgy

Sub surface porosity can be decreased by_______________?

Dental Materials, Medical Mcqs, Metallurgy / admin

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

Sub surface porosity can be decreased by_______________? Read More »

Dental Materials, Medical Mcqs, Metallurgy

The inlay wax most commonly used for direct technique_____________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

The inlay wax most commonly used for direct technique_____________________?

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

The purity of gold is expressed in________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

The purity of gold is expressed in________________?

A. Carats
B. Percentage
C. Fineness
D. Gram

The purity of gold is expressed in________________? Read More »

Dental Materials, Medical Mcqs, Metallurgy

In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

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

In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________? Read More »

Dental Materials, Medical Mcqs, Metallurgy

Investment material used for cobalt-chromium alloys is_____________?

Dental Materials, Medical Mcqs, Metallurgy / admin

Investment material used for cobalt-chromium alloys is_____________?

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

Silica sol__________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

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

Silica sol__________________? Read More »

Dental Materials, Medical Mcqs, Metallurgy

Boxing wax is also called as________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

Boxing wax is also called as________________?

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

Shape memory in NiTi is because of stress induced form__________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

Shape memory in NiTi is because of stress induced form__________________?

A. Austenite to martensite
B. Martensite to austenite
C. Ferrite to austenite
D. Austenite to ferrite

Shape memory in NiTi is because of stress induced form__________________? Read More »

Dental Materials, Medical Mcqs, Metallurgy

Casting shrinkage is compensated by_______________?

Dental Materials, Medical Mcqs, Metallurgy / admin

Casting shrinkage is compensated by_______________?

A. Thermal expansion
B. Hygroscopic expansion
C. Wax expansion
D. All of the above

Casting shrinkage is compensated by_______________? Read More »

Dental Materials, Medical Mcqs, Metallurgy

The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?

Dental Materials, Medical Mcqs, Metallurgy / admin

The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?

A. 55
B. 65
C. 75
D. 85

The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________? Read More »

Dental Materials, Medical Mcqs, Metallurgy