1 - A crystal in metal substructure is_______________?
1 - A crystal in metal substructure is_______________?
Grain
2 - A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?
2 - A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?
Newtonian
3 - A good adhesive should possess all of the following EXCEPT________________?
3 - A good adhesive should possess all of the following EXCEPT________________?
High contact angle
4 - A material which partially transmits light & partially scatters it________________?
4 - A material which partially transmits light & partially scatters it________________?
Transparent
5 - A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?
5 - A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?
More resistance to permanent deformation
6 - Ability of an orthodontic wire to spring back to its original shape is evaluated by_____________?
6 - Ability of an orthodontic wire to spring back to its original shape is evaluated by_____________?
Resilience
7 - Angles between Adhesive and Adherent is Zero degree, it indicates_______________?
7 - Angles between Adhesive and Adherent is Zero degree, it indicates_______________?
Complete wetting of surfaces
8 - Brazilian test is used to determine the ultimates tensile strength of_________________?
8 - Brazilian test is used to determine the ultimates tensile strength of_________________?
Brittle materials
9 - Brinnel hardness number of a dental gold alloy is directly proportional to its______________?
9 - Brinnel hardness number of a dental gold alloy is directly proportional to its______________?
Tensile strength
10 - Coefficient of thermal expansion of which of following is most similar to that of tooth ?
10 - Coefficient of thermal expansion of which of following is most similar to that of tooth ?
Silicate cement
11 - Coefficienty of thermal expansion of tooth enamel is closest to_______________?
11 - Coefficienty of thermal expansion of tooth enamel is closest to_______________?
GIC
12 - Compressive stress is computed by dividing the external force by the_______________?
12 - Compressive stress is computed by dividing the external force by the_______________?
Area of the test specimen upon which the weight rests
13 - Deformation that is recovered upon removal of an externally applied force or pressure is known as_____________?
13 - Deformation that is recovered upon removal of an externally applied force or pressure is known as_____________?
Elastic strain
14 - Ductility of a material is a measure of it's_______________?
14 - Ductility of a material is a measure of it's_______________?
Grain elongation
15 - Etching of dentin does not include_____________?
15 - Etching of dentin does not include_____________?
Increases surface energy
16 - Flow of a material refers to_______________?
16 - Flow of a material refers to_______________?
Continued change of the material under a given load
17 - For adhesion to be present between solid and liquid________________?
17 - For adhesion to be present between solid and liquid________________?
Liquid should wet solid surface
18 - Hardness number which does not depend on the ductility of metal_____________?
18 - Hardness number which does not depend on the ductility of metal_____________?
KNH
19 - In measuring Vickers hardness no. Which of the following is used________________?
19 - In measuring Vickers hardness no. Which of the following is used________________?
136-degree diamond pyramid
20 - KHN of enamel is close to______________?
20 - KHN of enamel is close to______________?
Prcelain
21 - KHN value of Amalgam is_________________?
21 - KHN value of Amalgam is_________________?
90
22 - Liquids which become more rigid as the rate of deformation increases is termed as_____________?
22 - Liquids which become more rigid as the rate of deformation increases is termed as_____________?
Dilatant
23 - Materials which has high compressive strength and low tensile strength is classified with property of________________?
23 - Materials which has high compressive strength and low tensile strength is classified with property of________________?
Brittleness
24 - Maxwell – Voigt Model is to determine________________?
24 - Maxwell – Voigt Model is to determine________________?
Viscoelastic Behaviour
25 - Modulus of elasticity means_______________?
25 - Modulus of elasticity means_______________?
Rigidity or stiffness of the material
26 - Munsell system is used to_________________?
26 - Munsell system is used to_________________?
Measures different colours quantitatively
27 - Non metal which conducts elactricity______________?
27 - Non metal which conducts elactricity______________?
Graphite
28 - Property of the material, which describes the resistance to abrasion, is_________________?
28 - Property of the material, which describes the resistance to abrasion, is_________________?
Hardness
29 - Space lattice refers to_______________?
29 - Space lattice refers to_______________?
Arrangement of atoms
30 - Strain is defined as_____________?
30 - Strain is defined as_____________?
A deformation resulting from an applied load
31 - Stress in defined as_______________?
31 - Stress in defined as_______________?
An internal force opposing an applied load
32 - Sublimation is the conversion of a___________________?
32 - Sublimation is the conversion of a___________________?
Solid directly to gas
33 - The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its______________?
33 - The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its______________?
Elastic limit / Elastic strain
34 - The ability of the base to resist occlusal forces and to support the restoration is affected by_______________?
34 - The ability of the base to resist occlusal forces and to support the restoration is affected by_______________?
Compressive strength
35 - The elastic of plastic deformation to fracture a material is its_______________?
35 - The elastic of plastic deformation to fracture a material is its_______________?
Toughness
36 - The forces that hold atoms together are called_____________?
36 - The forces that hold atoms together are called_____________?
Cohesive forces
37 - The greatest stress which may be produced in a material such that stress is directly proportional to the strain is know as_____________?
37 - The greatest stress which may be produced in a material such that stress is directly proportional to the strain is know as_____________?
The proportional limit
38 - The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?
38 - The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?
25 – 35 KHN
39 - The melting point of silver is_____________?
39 - The melting point of silver is_____________?
960° Centigrade
40 - The modulus of elasticity is defined as_______________?
40 - The modulus of elasticity is defined as_______________?
The stress/strain ratio within the proportional limit
41 - The point at which a stress of a material exhibits a specific limited deviation P is called_______________?
41 - The point at which a stress of a material exhibits a specific limited deviation P is called_______________?
Yield strength
42 - The proportional limit is defined as______________?
42 - The proportional limit is defined as______________?
The maximum stress that can be induced without permanent deformation
43 - The simplest alloy is a_______________?
43 - The simplest alloy is a_______________?
Solid solution
44 - The stiffness of a dental gold alloy is determined by its________________?
44 - The stiffness of a dental gold alloy is determined by its________________?
Modulus of elasticity
45 - The strain that occurs when a material is stressed to its proportional limit is______________?
45 - The strain that occurs when a material is stressed to its proportional limit is______________?
Maximum flexibility
46 - The wetting of an adherent surface by an adhesive is related to________________?
46 - The wetting of an adherent surface by an adhesive is related to________________?
Surface energy of the adherent
47 - Ultimate tensile strength refers to_________________?
47 - Ultimate tensile strength refers to_________________?
Stress before rupture
48 - When solid gets wet completely contact angle is______________?
48 - When solid gets wet completely contact angle is______________?
0°
49 - When two metals are completely miscible in liquid state and they remain completely mixed on solidifiation, the alloy formed is called________________?
49 - When two metals are completely miscible in liquid state and they remain completely mixed on solidifiation, the alloy formed is called________________?
Solid solution
50 - Which of the following hardness test is a micro hardness test ?
50 - Which of the following hardness test is a micro hardness test ?
Knoop
51 - Which of the following has the highest modulus of elasticity ?
51 - Which of the following has the highest modulus of elasticity ?
Enamel
52 - Which of the following physical property can be used to estimate indirectly the proportional limit of gold alloys ?
52 - Which of the following physical property can be used to estimate indirectly the proportional limit of gold alloys ?
Brinell hardness number
53 - Which of the following properties of dental materials is time dependent_______________?
53 - Which of the following properties of dental materials is time dependent_______________?
Creep
54 - Which one of the following is the result of applying a load to a wire below its modulus of elasticity on a load deflection diagram ?
54 - Which one of the following is the result of applying a load to a wire below its modulus of elasticity on a load deflection diagram ?
Spring back
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