Condensation shrinkage of porcelain during firing depends on__________________?

Related Mcqs:

1. Porosity in porcelain at condensation stage depends on_________________?

   A. Shape and size of particle
   B. Uniform distribution of particle size
   C. Number of particles
   D. None of the above

2. The maximum shrinkage during firing proces in ceramic occurs in__________________?

   A. High Bisque stage
   B. Low Bisque stage
   C. Medium Bisque stage
   D. Fusion stage

3. For porcelain fused to metal crown, the porcelain should have ______________?

   A. High fusion expansion
   B. High fusion temperature
   C. Linear coefficient of thermal expansion less than that of metal
   D. Linear coefficient of thermal expansion more than that of metal

4. 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

5. 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

6. Porcelain denture teeth________________?

   A. Have a higher coefficient of thermal expansion than acrylic teeth:
   B. Have a lower abrasion resistance than enamel
   C. Should be used where the inter dental clearance is small
   D. Have a higher abrasion resistance than gold

7. Phenomenon in which porcelain appears different under varying light condition is______________?

   A. Translucency
   B. Refractive optics
   C. Metamerism
   D. Opacification

8. Porcelain binds to metal in PFM crown by_________________?

   A. Metallic bind
   B. Transparency
   C. Chemical bond
   D. B and C

9. Quartz is Dental porcelain is______________?

   A. Strengthener
   B. Binder
   C. Pigment
   D. Crack minimzer

10. Porosity in porcelain can be prevented by_______________?

    A. Thoroughness of condensation
    B. Rapidity of firing
    C. High firing temperature
    D. All of the above