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Latest Medical MCQs – New Physical Properties ( Dental Materials ) MCQs

Latest Medical MCQs – New Physical Properties ( Dental Materials ) MCQs

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Latest Medical MCQs

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Latest Physical Properties ( Dental Materials ) Mcqs

The most occurred mcqs of Physical Properties ( Dental Materials ) in past papers. Past papers of Physical Properties ( Dental Materials ) Mcqs. Past papers of Physical Properties ( Dental Materials ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Physical Properties ( Dental Materials ) Mcqs. The Important series of Physical Properties ( Dental Materials ) Mcqs are given below:

A material behaves in certain ways above and below the proportional limit on a stress strin curve, which of the following is correct______________?

A. Above the proportional limit a material function in a plastic manner, while below the proportional limit it behaves as an elastic
B. Above the proportional limit a material functions in an elastic manner, while below the proportional limit it behaves as an plastic
C. Either of the above
D. Neither of the above

Deformation that is recovered upon removal of an externally applied force or pressure is known as_____________?

A. Plastic strain
B. Young’s modulus
C. Elastic strain
D. Flexural strain

Coefficienty of thermal expansion of tooth enamel is closest to_______________?

A. Composite
B. Slicate cement
D. Polycarboxylate

The forces that hold atoms together are called_____________?

A. Secondary forces
B. Primary forces
C. Cohesive forces
D. Ionic forces

A material which partially transmits light & partially scatters it________________?

A. Translucent
B. Reflector
C. Transparent
D. Opaque

Angles between Adhesive and Adherent is Zero degree, it indicates_______________?

A. Complete wetting of surfaces
B. Irregularities present between Adherent surfaces
C. Adherent and Adhesive molecules are tangent to each other
D. Rough surfaces between Adhesive & Adherent

Brazilian test is used to determine the ultimates tensile strength of_________________?

A. Flexible materials
B. Ductile materials
C. Brittle materials
D. Malleable materials

For adhesion to be present between solid and liquid________________?

A. Liquid should wet solid surface
B. Should have high contact angle
C. Mechanical interlocking should be present
D. None of the above

When two metals are completely miscible in liquid state and they remain completely mixed on solidifiation, the alloy formed is called________________?

A. Solid solution
B. Peritectic mixture
C. Eutectic mixture
D. Inter metallic compounds

A crystal in metal substructure is_______________?

A. Grain
B. Stroma
C. Nucleus
D. None of the above

Munsell system is used to_________________?

A. Evaluate brittleness of different alloys
B. Define and measure physical properties of gold alloys
C. Define and measure colour qualitatively
D. Measures different colours quantitatively

Space lattice refers to_______________?

A. Inter atomic imbalance
B. Inter atomic movement
C. Arrangement of atoms
D. Arrangement of molecules

The strain that occurs when a material is stressed to its proportional limit is______________?

A. Toughness
B. Maximum flexibility
C. Resilience
D. Elastic limit

Liquids which become more rigid as the rate of deformation increases is termed as_____________?

A. Pseudoplastic
B. Thixotropic
C. Dilatant
D. Newton

Impression Materials MCQs

A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?

A. Greater toughness
B. Greater ductility
C. A higher modulus of elasticity
D. A higher modulus of elasticity
E. More resistance to permanent deformation

Which of the following has the highest modulus of elasticity ?

A. Amalgam
B. Enamel
C. Dentin
D. Composite Resin

The wetting of an adherent surface by an adhesive is related to________________?

A. Surface energy of the adherent
B. Surface tension of the adherent
C. Surface texture of the adherent
D. Nature of the adherent that is crystalline or amorphous

Coefficient of thermal expansion of which of following is most similar to that of tooth ?

A. Acrylic resin
B. Gold inlay
C. Silicate cement
D. Gold foil

The stiffness of a dental gold alloy is determined by its________________?

A. Flow
B. Modulus of elasticity
C. Ultimate tensile strength
D. Proportional limit

Ductility of a material is a measure of it’s_______________?

A. Grain elongation
B. Cold working
C. Anealing
D. Work hardening

Sublimation is the conversion of a___________________?

A. Solid directly to gas
B. Gas directly to liquid
C. Gas to liquid and then to soild
D. Solid to liquid and then to gas

Modulus of elasticity means_______________?

A. Rigidity or stiffness of the material
B. Ductility of a material
C. Ability to be stretched with permanent deformation
D. Malleability of the metal

When solid gets wet completely contact angle is______________?

A. 0 – 90°
B. 0°
C. 90°
D. >90°

Brinnel hardness number of a dental gold alloy is directly proportional to its______________?

A. Tensile strength
B. Modulus of elasticity
C. Elongation
D. Modulus of resilience

Hardness number which does not depend on the ductility of metal_____________?


The greatest stress which may be produced in a material such that stress is directly proportional to the strain is know as_____________?

A. The yield strength
B. The proportional limit
C. The elastic limit
D. Modulus of elasticity

The modulus of elasticity is defined as_______________?

A. The strain at the proportional limit
B. The stress at the proportional limit
C. The stress/strain ratio within the proportional limit
D. None of the above

Strain is defined as_____________?

A. An external force opposing an applied load
B. A deformation resulting from an applied load
C. An applied load or force
D. An internal force opposing an applied load

Restorative Resins MCQs

A good adhesive should possess all of the following EXCEPT________________?

A. Low contact angle
B. High contact angle
C. High adherend wetting
D. High flow

In measuring Vickers hardness no. Which of the following is used________________?

A. Steel ball indentation
B. Spherical indenter
C. Rhomboid shaped indenter
D. 136-degree diamond pyramid

The simplest alloy is a_______________?

A. Solid solution
B. Peritectic alloy
C. Eutectic alloy
D. Ternary alloy

Materials which has high compressive strength and low tensile strength is classified with property of________________?

A. Malleability
B. Brittleness
C. Ductility
D. Resilient

Maxwell – Voigt Model is to determine________________?

A. Plastic Behaviour
B. Elastic Behaviour
C. Viscoelastic Behaviour
D. All of the above

KHN value of Amalgam is_________________?

A. 90
B. 67
C. 343
D. 450

The melting point of silver is_____________?

A. 850° Centrigrade
B. 960° Centigrade
C. 1063° centigrade
D. 1123° Centrigrade

Non metal which conducts elactricity______________?

A. Graphite
B. Acrylic
C. Carbon
D. Porcelain

Etching of dentin does not include_____________?

A. Exposure of collagen fibers
B. Removal of smear layer
C. Opening of dentinal tubules
D. Increases surface energy

The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?

A. 15 – 20 KHN
B. 25 – 35 KHN
C. 50 – 60 KHN
D. 40 – 48 KHN

The elastic of plastic deformation to fracture a material is its_______________?

A. Toughness
B. Young’s modulus
C. Brittleness
D. Proportional limit

KHN of enamel is close to______________?

A. Amalgam
B. Pure gold
C. Prcelain
D. Composite

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 ?

A. permanent deformation
B. Fracture of the wire
C. Spring back
D. Increase in stiffness

A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?

A. Pseudoplastic
B. Viscoelastic
C. Plastic
D. Newtonian

Which of the following hardness test is a micro hardness test ?

A. Shore-A
B. Knoop
C. Brinnel
D. Rockwell

Which of the following properties of dental materials is time dependent_______________?

A. Creep
B. Elastic limit
C. Resillience
D. Ultimate strength

Flow of a material refers to_______________?

A. Continued change of the material under a given load
B. The homogencity of gypsum products
C. The consistency of material when mixing
D. Dimensional change of the material during settings

The ability of the base to resist occlusal forces and to support the restoration is affected by_______________?

A. Compressive strength
B. Young’s modulus
C. Tensile strength
D. Modulus of elasticity

The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its______________?

A. Hardness
B. Elastic limit / Elastic strain
C. Resilience
D. Fatigue resistance

Which of the following physical property can be used to estimate indirectly the proportional limit of gold alloys ?

A. Knoop hardness number
B. Vickers’s hardness number
C. Brinell hardness number
D. Rockwell hardness number

Property of the material, which describes the resistance to abrasion, is_________________?

A. Hardness
B. Modulus of elasticity
C. Yield strength
D. None of the above

Amalgams MCQs

Ultimate tensile strength refers to_________________?

A. Stress before rupture
B. Longitudinal compressive strength
C. Stress after rupture
D. Horizontal compressive strength

Ability of an orthodontic wire to spring back to its original shape is evaluated by_____________?

A. Tensile strength
B. Resilience
C. Brittleness
D. Toughness

The point at which a stress of a material exhibits a specific limited deviation P is called_______________?

A. Tensile strength
B. Proportional limit
C. Ultimate strength
D. Yield strength

Compressive stress is computed by dividing the external force by the_______________?

A. Area of the test specimen upon which the weight rests
B. Length of the test specimen beneath the force
C. Elasticity of the test specimen in strain
D. Strain of the test specimen per unit length

The proportional limit is defined as______________?

A. The minimum force required to cause a structure to break
B. The maximum stress in a structure
C. The maximum stress that can be induced without permanent deformation
D. The maximum elongation under tension that can be measured before failure

Stress in defined as_______________?

A. A deformation resulting from an applied load
B. An applied load or force
C. An external force opposing an applied load
D. An internal force opposing an applied load

Latest Medical MCQs – New Physical Properties ( Dental Materials ) MCQs