Porosity in porcelain at condensation stage depends on_________________?

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. 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

3. Porosity in porcelain can be prevented by_______________?

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

4. To prevent porosity in dental porcelain it should be backed________________?

   A. Boric oxide
   B. In vacuum
   C. For long period
   D. Under pressure

5. In processing methyl methacrylate, the resin may show porosity if the flask is placed too soon porosity most likely occur_____________?

   A. Throughout the denture
   B. Near the borders
   C. In the thickest part
   D. On the denture surface

6. 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

7. In porcelain metal elements are embedded in the matrix of________________?

   A. Rubber matrix
   B. Glass
   C. Plastic
   D. Resin matrix

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

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

9. Porcelain binds to metal in PFM crown by_________________?

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

10. Quartz is Dental porcelain is______________?

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