Glossy smooth margins of a casting are due to_____________?

Related Mcqs:

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

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

2. Fins and spines on the casting is seen due to_______________?

   A. Prolonged heating: B. Rapid heating me C. Water film contamination D. Too high pressure during casting...

3. 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...

4. The restoration which shows percolation and shrinkage along the margins is_____________?

   A. Composites B. Unfilled resins C. Amalgam D. Polycarboxylate...

5. Addition of large amounts of platinum to a casting gold alloy will________________?

   A. Decrease its strength and ability to be hardened B. Decrease its tarnish resistance C. Increase its fusion temperature D. Redden the alloy...

6. Crucible indicated for casting base metal alloys is______________?

   A. Carbon crucible B. Clay crucible C. Quartz crucible D. High melting plastic crucible...

7. 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...

8. Asbestos liner is used in a casting ring to________________?

   A. Facilitate venting of the mold B. Retard the heating of the investment C. Permit expansion of the world D. All of the above...

9. Impurities in casting is removed by________________?

   A. Annealing B. Degassing C. Pickling D. Conditioning...

10. The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?

    A. 55 B. 65 C. 75 D. 85...