Ideal requirement of metal ceramic casting____________?

Related Mcqs:

1. In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?

   A. Improve bonding
   B. Decrease porosity
   C. They react with the porcelain opaque layer, which masks the metal
   D. Improves the thermal expansion between the metal and porcelain

2. 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

3. The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?

   A. More
   B. Less
   C. Equal
   D. Depends on the alloy type

4. Linear coefficient of thermal expansion of metal used for metal caramic restoration range from________________?

   A. 11.5-12.5×10-6/°C
   B. 10.5-11.5×10-6/°C
   C. 13.5-14.5×10-6/°C
   D. 16.5-17.5×10-6/°C

5. Machineable glass ceramic is________________?

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

6. Flux used in dental ceramic is________________?

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

7. 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

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

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

9. Daily requirement of iron in man is_____________?

   A. 1gm
   B. 10 microgram
   C. 10 mg
   D. 20 mg

10. Which regards to temperature requirement, most pathogenic bacteria are_____________?

    A. Psychrophiles
    B. Mesophiles
    C. Cryophiles
    D. Thermophiles