The strength of a gypsum investment is dependent on_______________?
A. Carbon content
B. Silica content
C. Gypsum
D. Copper
Metallurgy
Ideal requirement of metal ceramic casting____________?
Ideal requirement of metal ceramic casting____________?
A. Low fusing ceramic and high fusing alloys
B. Matching of coefficients of thermal expansion of ceramics and alloy
C. Bonding between ceramic and alloy
D. All of the above
The pattern for the metallic framework of a removable partial denture is fabricated from________________?
The pattern for the metallic framework of a removable partial denture is fabricated from________________?
A. Inlay wax type-II
B. Boxing wax
C. Modelling wax
D. Casting wax
The contraction of gold alloy on solidifying is approximately_____________?
The contraction of gold alloy on solidifying is approximately_____________?
A. 0.4%
B. 1.4%
C. 2.4%
D. 3.4%
Tempering of steel cause________________?
Tempering of steel cause________________?
A. Increases its toughness
B. Increases hardness
C. Increase ductility
D. decreases its toughness
Which of the following will produce the most rigid restoration for framework of same dimension ?
Which of the following will produce the most rigid restoration for framework of same dimension ?
A. Wrought alloy
B. Palladium alloys
C. Cobalt-chrome alloys
D. Partial denture casting gold in hardened condition
Apart from composites and ceramics, another material that could be copy milled easily and inexpensively is_________________?
Apart from composites and ceramics, another material that could be copy milled easily and inexpensively is_________________?
A. Molybdenum
B. Germanium
C. Titanium
D. Chromium
Austenite is an alloy of iron of and carbon with the iron in______________?
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
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