Medical MCQs

5099 MCQs  (Page 72 of 510)

Which is the use of boxing an impression______________?
A. Ease of construction of denture
B. Preserving the sulci
C. Ease of pouring an impression
D. All of the above
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
Wax pattern is ideally invested immediately to decrease the dimensional changes caused by_______________?
A. Decrease flow
B. Continuous expansion
C. Relaxation of the internal stresses
D. Water loss
Cobalt-Chrominum alloys contains_______________?
A. 30% cobalt and 60% chrominum
B. 60% cobalt and 30% chrominum
C. 1% palladium
D. 20% gold
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