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Category: Dental Materials
Microstructure of cobalt chromium alloy in cast condition is______________?
A. Fibrous
B. Homogeneous
C. Inhomogenous
D. amorphous
During soldering, the solidus temperature of the filler material should be_____________?
A. Greater than the substrate material
B. Lesser than the substrate material
C. Equal to the substrate material
D. Temperature not relevant
The effects associated with cold working can be eliminated by a heat treatment called______________?
A. Age hardening heat treatment
B. Annealing heat treatment
C. Homogenization heat treatment
D. Solution heat treatment
Wax pattern is ideally invested immediately to decrease the dimensional changes caused by_______________?
A. Decrease flow
B. Continuous expansion
C. Relaxation of the internal stresses
D. Water loss
Which glass ionomer cement develops early resistance to water intake on setting ?
A. Reinforced auto care glass ionomer cement
B. Compomer
C. Resin modified glass ionomer cement
D. Ceramic reinforced glass ionomer cement
Deformation that is recovered upon removal of an externally applied force or pressure is known as_____________?
A. Young’s modulus
B. Plastic strain
C. Elastic strain
D. Flexural strain
Acrylic (cold cure)______________?
A. Melts at 100°C
B. Softens at 100°C
C. Still requires heat for polymerization
D. Produces heat during polymerization
The strength of a gypsum investment is dependent on_______________?
A. Carbon content
B. Silica content
C. Gypsum
D. Copper
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