Medical MCQs

5099 MCQs  (Page 71 of 510)

The function of a sprue is to_______________?
A. Form an opening of molten metal to enter the mold
B. Help polish cast restorations
C. Eliminate air bubbles on the wax pattern
D. Reproduce fine detail
Softening heat treatment of alloy increases_________________?
A. Tensile strength
B. Proportional limit
C. Ductility
D. Hardness
Function of carnauba wax_________________?
A. To provide a smooth and glossy surface
B. Increase toughness
C. Decrease toughness
D. Decrease flow at room temperature
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