Medical MCQs

5099 MCQs  (Page 58 of 510)

Modulus of elasticity means_______________?
A. Rigidity or stiffness of the material
B. Ability to be stretched with permanent deformation
C. Ductility of a material
D. Malleability of the metal
Sublimation is the conversion of a___________________?
A. Solid directly to gas
B. Gas to liquid and then to soild
C. Gas directly to liquid
D. Solid to liquid and then to gas
Ductility of a material is a measure of it’s_______________?
A. Grain elongation
B. Anealing
C. Cold working
D. Work hardening
The stiffness of a dental gold alloy is determined by its________________?
A. Proportional limit
B. Modulus of elasticity
C. Ultimate tensile strength
D. Flow
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
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 elasticity
The melting point of silver is_____________?
A. 1063° centigrade
B. 960° centigrade
C. 850° centrigrade
D. 1123° centrigrade