A. Type I and Type II gold can be heat treated and annealed
B. Type III and Type IV gold can be heat treated and annealed
C. Type I and IV gold can be heat treated and annealed
D. All the type of gold can be heat treated and annealed
Metallurgy
Metallurgy
A. Casts
B. Models
C. Investment
D. Dies
A. Using asbestos linear
B. Placing the sprue at least one quarter inch away form the end of casting ring
C. Preventing rapid heating the investment in burnout oven
D. Using a short and wide sprue
A. Reducing flame
B. Oxidizing flame
C. Green flame
D. All of the above
A. Warm HCI
B. Cold HF
C. Cold H2SO4
D. Sand blasting with aluminium oxide
A. a titanium
B. B titanium
C. Chrome-cobalt-nickel
D. Nickel-titanium
A. Produce a smoother casting
B. Decrease setting expansion
C. Increase setting expansion
D. Increase thermal expansion
A. Tempering
B. Work hardening
C. Age hardening
D. Precipitation hardening
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
A. Shape memory
B. Hyper rigidity
C. Corrosion resistance
D. Weldable properties
