A. Fracture of the wire
B. permanent deformation
C. Spring back
D. Increase in stiffness
0
A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?
0
Which of the following hardness test is a micro hardness test ?
A. Viscoelastic
B. Pseudoplastic
C. Plastic
D. Newtonian
0
Which of the following properties of dental materials is time dependent_______________?
A. Brinnel
B. Knoop
C. Shore-A
D. Rockwell
0
Flow of a material refers to_______________?
A. Creep
B. Resillience
C. Elastic limit
D. Ultimate strength
0
The ability of the base to resist occlusal forces and to support the restoration is affected by_______________?
A. Continued change of the material under a given load
B. The consistency of material when mixing
C. The homogencity of gypsum products
D. Dimensional change of the material during settings
0
The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its______________?
A. Compressive strength
B. Tensile strength
C. Young’s modulus
D. Modulus of elasticity
0
Which of the following physical property can be used to estimate indirectly the proportional limit of gold alloys ?
A. Resilience
B. Elastic limit / Elastic strain
C. Hardness
D. Fatigue resistance
0
Property of the material, which describes the resistance to abrasion, is_________________?
A. Vickers’s hardness number
B. Knoop hardness number
C. Brinell hardness number
D. Rockwell hardness number
0
Ultimate tensile strength refers to_________________?
A. Hardness
B. Yield strength
C. Modulus of elasticity
D. None of the above
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