The rate of tarnish and corrosion of class II cast material having VHN 200 is_______________?

Related Mcqs:

Gypsum bonded investment should not be heated over______________?

A. 700°C B. 1,300°C C. 1,063°C D. 900°C...

Crucible indicated for casting base metal alloys is______________?

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

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...

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...

Pickling________________?

A. Is accomplished by soaking the casting in baking soda B. Causes porosity in gold C. Removes surface oxides from gold castings D. Remove investment from gold casting...