The maximum shrinkage during firing proces in ceramic occurs in__________________?

Related Mcqs:

1. Condensation shrinkage of porcelain during firing depends on__________________?

   A. Rate of arriving at firing temperature
   B. Uniformity of particle size
   C. Shape and size of particle
   D. Type of investment used

2. In method of firing: A shorter firing period at a higher temperature is considered better_______________?

   A. A large time period at a lower temperature is preferred
   B. A long firing period at a very high temperature is preferred
   C. A short firing period at a very low temperature is preferred
   D. none of these

3. Sporulation occurs in__________________?

   A. Lag phase
   B. Log phase
   C. Stationary phase
   D. Decline phase

4. Machineable glass ceramic is________________?

   A. Cerestore
   B. Decor MGC
   C. Infusium
   D. Leucite

5. Flux used in dental ceramic is________________?

   A. Alumina
   B. Silica
   C. Kaolin
   D. Boric oxide

6. Coefficient of thermal expansion of metal-ceramic alloys is________________?

   A. Same as porcelain
   B. More than porcelain
   C. Less than porcelain
   D. More than or equal to porcelain but not less

7. The main purpose of adding metallic oxides in ceramic is________________?

   A. Colour matching
   B. Transparency
   C. Opacity
   D. None of the above

8. Stage recognized in the firing of dental porcelain given below. Which of state is not correct ?

   A. Cold stage bisque
   B. Low bisque
   C. Medium bisque
   D. High bisque

9. Casting shrinkage is compensated by_______________?

   A. Thermal expansion
   B. Hygroscopic expansion
   C. Wax expansion
   D. All of the above

10. About polymerization shrinkage of composite all are true, except______________?

    A. Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area
    B. Polymerization shrinkage is high if within the enamel margins
    C. Acid etching and priming will decrease polymerization shrinkage
    D. Microleakage can occur because of polymerization shrinkage