Casting shrinkage is compensated by_______________?

Related Mcqs:

1. The linear solidification shrinkage of Type IV Ni-Cr based alloys is_______________?

   A. 2.3%
   B. 1.56%
   C. 1.37%
   D. 3%

2. Localised shrinkage porosity is seen when there________________?

   A. Thin sprue
   B. No reservoir
   C. Investment heated strongly
   D. Inadequate air discharge

3. Resistance to corrosion in a cobalt-chrome casting is due to presence of_______________?

   A. High quality iron
   B. Chrome
   C. Cobalt
   D. Nickel

4. Flux is used during casting to________________?

   A. Remove the oxides formed on the gold alloy
   B. Lower the melting point
   C. Replace casting wax
   D. Speed the burnout process

5. Glossy smooth margins of a casting are due to_____________?

   A. Shrinkage of alloy on cooling
   B. Investment breakdown
   C. Incomplete wax elimination
   D. Incomplete gas elimination

6. Incomplete casting is the result of_____________?

   A. More porous investment in the mould
   B. Narrow sprue diameter
   C. Hollow sprue pin
   D. Large reservoir

7. Casting flux is used to_______________?

   A. Prevent the oxidation of the metal during melting
   B. increase the melting point of the flux
   C. Flaring the point of the sprue attachment
   D. None of the above

8. Function of wetting agents used in casting procedure is_________________?

   A. To felicitate wetting of ring liner
   B. To felicitate mixing investment
   C. To reduce contact angle of liquid with max surface
   D. For better wax elimination

9. Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?

   A. Chromium
   B. Indium
   C. Irridium
   D. Palladium

10. Which zone is the hottest and efficient burning zone of the flame used for casting ?

    A. Oxidizing zone
    B. Reducing zone
    C. Combustion zone
    D. None of the above