Medical MCQs

5099 MCQs  (Page 70 of 510)

A common electrolyte used for plating copper indirect dies is_______________?
A. Copper cynide
B. Ionic copper
C. Acidic copper sulfate
D. Silver cyanide
Waxes are used for_______________?
A. Primary impression
B. Corrective impressions
C. Impression of single tooth
D. None of the above
Passivating alloys are_______________?
A. Cr, al, ti
B. Cr, mo, ti
C. Cr, gold, ti
D. Cr, fe, ti
Crucible indicated for casting base metal alloys is______________?
A. Carbon crucible
B. Clay crucible
C. Quartz crucible
D. High melting plastic crucible
Heat hardening is the process done at_______________?
A. Heating 750°c and slowly cooling to zero degree
B. Heating quickly upto 450°c followed by sudden quenching
C. Heating upto 250°c for 15 to 30 min
D. Heating at 750°c and then quenching to room temperature
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
The sprue in wax pattern should be placed________________?
A. At right angle
B. At 45°c angle
C. At obtuse angle
D. It depend upon type of wax pattern