Medical MCQs

5099 MCQs  (Page 93 of 510)

Greening occuring when porcelains are fired on silver free alloys may be attributed to________________?
A. Vaporization of silver from the walls of contaminated furnaces
B. Surface diffusion of silver from the marginal metal
C. More rapid silver diffusion in sodium containing glass
D. Silver ionization by porcelains with high oxygen potential
Electrolyte used for plating copper dies is________________?
A. Ionic copper
B. Copper cyanide
C. Silver cyanide
D. Acidic copper sulphate
Machineable glass ceramic is________________?
A. Cerestore
B. Decor mgc
C. Infusium
D. Leucite
Which is not present in porcelain________________?
A. Silica
B. Feldspar
C. Calcium carbonate
D. Amorphous material
Opaque porcelain________________?
A. Is feldspathic glass
B. Contains opacifier like zirconium and titanium oxide
C. Not used to mask the colour of the cement used in placing of restoration
D. Used to produce the characteristic translucence, which is an inherent aspect of the incisal edge in natural teeth
Dicor restoration is_______________?
A. Two coloured restorations
B. Heat pressed ceramics
C. Castabel ceramic
D. None of the above