Category: Metallurgy

A. Strengtherner
B. Hardener
C. Whitens the alloy
D. Scavenger

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. Warm HCI
B. Cold HF
C. Cold H2SO4
D. Sand blasting with aluminium oxide

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. Unreliable spring back
B. low spring back
C. Minimal spring back
D. None of the above

A. Constitutional superconductivity
B. Constitutional supercooling
C. Constitutional supergriting
D. Constitutional supergraining

A. Strength
B. Expansion components for casting shrinkage
C. Decrease strength
D. Contraction

A. Hydrogen
B. Natural gas
C. Acetylene
D. Propane

A. Recovery recrystallization grain growth
B. Recrystallization recovery, grain growth
C. Grain Growth Recrystallization recovery
D. Melting point, grain growth, Recrystallization

A. Gold-Copper
B. Nickel-Chromium
C. Nickel-Titanium
D. Silver-Palladium