Munsell system is used to_________________? A. Define and measure colour qualitatively B. Define and measure physical properties of gold alloys C. Evaluate brittleness of different alloysD. Measures different colours quantitatively
Space lattice refers to_______________? A. Inter atomic movement B. Inter atomic imbalanceC. Arrangement of atoms D. Arrangement of molecules
The strain that occurs when a material is stressed to its proportional limit is______________? A. ResilienceB. Maximum flexibility C. Toughness D. Elastic limit
Liquids which become more rigid as the rate of deformation increases is termed as_____________? A. Thixotropic B. PseudoplasticC. Dilatant D. Newton
A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________? A. Greater ductility B. Greater toughness C. A higher modulus of elasticity D. A higher modulus of elasticityE. More resistance to…
Which of the following has the highest modulus of elasticity ? A. DentinB. Enamel C. Amalgam D. Composite Resin
The wetting of an adherent surface by an adhesive is related to________________? A. Surface energy of the adherent B. Surface texture of the adherent C. Surface tension 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. Gold inlay B. Acrylic resinC. Silicate cement D. Gold foil
The stiffness of a dental gold alloy is determined by its________________? A. Proportional limitB. Modulus of elasticity C. Ultimate tensile strength D. Flow
Ductility of a material is a measure of it’s_______________? A. Grain elongation B. Anealing C. Cold working D. Work hardening