Ceramics fired to metals are processed by_______________?
Ceramics fired to metals are processed by_______________? A. Heat pressing B. MachiningC. Sintering D. Slip casting
Ceramics fired to metals are processed by_______________? A. Heat pressing B. MachiningC. Sintering D. Slip casting
When porcelain is basked against metal, it should possess a________________? A. high fusion expansion B. high fusion temperatureC. linear coefficient of thermal expansion less than but close to that of metal D. Linear coefficient of thermal expansion greater than, but…
Clogging of an abrasive wheel with debris causing reduction of abrasive action is called________________? A. Blinding B. Buffing C. Dressing D. Truing
Which of the following releases single wavelength of energy ? A. QTH B. PAC C. LEDD. Argon lasers
The melting point of titanium is __________ degree celsius? A. 1056 B. 1560C. 1668 D. 1886
Electrolyte used for plating copper dies is________________? A. Ionic copper B. Copper cyanide C. Silver cyanideD. Acidic copper sulphate
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…
Compared with dental alloys, CERAMICS show____________________? A. High ductility B. High hardness C. Low esthetic valueD. Susceptibility to brittle fracture
Chemical method of strengthening porcelain involves_________________? A. Exchange of aluminium and sodium ions B. Exchange of aluminium and potassium ionsC. Exchange of sodium and potassium ions D. None of the above
The first porcelain tooth material was introduced by______________? A. DeChemant B. Ash C. Plateau D. McClean