Impurities in casting is removed by________________?

Related Mcqs:

1. Suck back porosity in the casting can be eliminated by________________?

   A. Increasing the mould metal temperature difference B. Increasing the flow of molten metal C. Flaring the point of the sprue attachment D. All of the above...

2. Gap between true end of casting ring and wax pattern should be______________?

   A. ¼ inch B. ½ inch C. 3/8 inch D. one inch...

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. 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...

5. Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?

   A. Platinum B. Copper C. Silver D. Gold...

6. Titanium casting is done_____________?

   A. Under vacuum in argon atmosphere B. Under air pressure in nitrogen atmosphere C. In specially fabricated aluminium vanadium D. Using CAD-CAM technique...

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. Air bubbles formed on the surface of casting is probably due to________________?

   A. Improper casting pressure B. Improper heating of the investment C. Improper angulation of sprue D. Improper wetting of the wax pattern by the investment...

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...