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.Management Sciences
Category: Physical Properties
The proportional limit is defined as______________?
A. The maximum stress in a structure
B. The minimum force required to cause a structure to break
C. The maximum stress that can be induced without permanent deformation
D. The maximum elongation under tension that can be measured before failure
For adhesion to be present between solid and liquid________________?
A. Liquid should wet solid surface
B. Mechanical interlocking should be present
C. Should have high contact angle
D. None of the above
Brazilian test is used to determine the ultimates tensile strength of_________________?
A. Ductile materials
B. Flexible materials
C. Brittle materials
D. Malleable materials
Brinnel hardness number of a dental gold alloy is directly proportional to its______________?
A. Tensile strength
B. Elongation
C. Modulus of elasticity
D. Modulus of resilience
The strain that occurs when a material is stressed to its proportional limit is______________?
A. Resilience
B. Maximum flexibility
C. Toughness
D. Elastic limit
Coefficienty of thermal expansion of tooth enamel is closest to_______________?
A. Slicate cement
B. Composite
C. GIC
D. Polycarboxylate
The ability of the base to resist occlusal forces and to support the restoration is affected by_______________?
A. Compressive strength
B. Tensile strength
C. Young’s modulus
D. Modulus of elasticity
A crystal in metal substructure is_______________?
A. Grain
B. Nucleus
C. Stroma
D. None of the above
The stiffness of a dental gold alloy is determined by its________________?
A. Proportional limit
B. Modulus of elasticity
C. Ultimate tensile strength
D. Flow
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