Quartz is Dental porcelain is______________?

Related Mcqs:

1. 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...

2. The main difference between dental stone and dental plaster is______________?

   A. Chemical composition B. Self life C. Sharpe and size of particles D. Solubility in water...

3. The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

   A. 19 B. 20 C. 21 D. 26...

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

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

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

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

7. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?

   A. Have less marginal breakdown B. Are workable at lower Hg-alloy ratio C. Have a higher ratio of tensile to compressive strength D. Have less resistance to tarnish and corrosion...

8. Powders of dental plaster and dental stone differ mainly in____________?

   A. Solubility B. Shelf life C. Chemical formula D. Particle porosity...

9. For dental amalgam, the elastic modulus and tensile strength is______________?

   A. 40 Gpa and 60 – 100 Mpa B. 21 Gpa and 27 – 55 Mpa C. 350 Gpa and 10 – 120 Mpa D. 360 Gpa and 125 – 130 Mpa...

10. In non zinc containing dental amalgam alloy the percentage of zinc present is______________?

    A. Less than 0.02% B. Less than 0.1% C. Less than 0.01% D. None of the above...