MCQs of Dental Materials – Physical Properties

Stress in defined as:

Strain is defined as:

The proportional limit is defined as:

The modulus of elasticity is defined as:

Compressive stress is computed by dividing the external force by the:

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

The point at which a stress of a material exhibits a specific limited deviation P is called:

Hardness number which does not depend on the ductility of metal

Ability of an orthodontic wire to spring back to its original shape is evaluated by:

Brinnel hardness number of a dental gold alloy is directly proportional to its:

Ultimate tensile strength refers to:

When solid gets wet completely contact angle is:

Property of the material, which describes the resistance to abrasion, is:

Modulus of elasticity means:

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

Sublimation is the conversion of a:

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

Ductility of a material is a measure of it’s

The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its:

The stiffness of a dental gold alloy is determined by its:

The ability of the base to resist occlusal forces and to support the restoration is affected by:

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

Flow of a material refers to:

The wetting of an adherent surface by an adhesive is related to:

Which of the following properties of dental materials is time dependent

Which of the following has the highest modulus of elasticity?

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

A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have:

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

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

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?

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

KHN of enamel is close to:

Space lattice refers to:

The elastic of plastic deformation to fracture a material is its:

Munsell system is used to:

The Knoop Hardness Number of Microfilled composite Restorative material ranges from:

A crystal in metal substructure is:

Etching of dentin does not include:

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

Non metal which conducts elactricity

For adhesion to be present between solid and liquid

The melting point of silver is:

Brazilian test is used to determine the ultimates tensile strength of:

KHN value of Amalgam is:

Angles between Adhesive and Adherent is Zero degree, it indicates:

Maxwell – Voigt Model is to determine

A material which partially transmits light & partially scatters it:

Materials which has high compressive strength and low tensile strength is classified with property of:

The forces that hold atoms together are called:

The simplest alloy is a:

Coefficienty of thermal expansion of tooth enamel is closest to:

In measuring Vickers hardness no. Which of the following is used:

Deformation that is recovered upon removal of an externally applied force or pressure is known as:

A good adhesive should possess all of the following EXCEPT: