Question: Stabilization of stainless steel is achieved by adding____________?

• 1. Carbon
• 2. Chromium
• 3. Nickel
• 4. Titanium

Question: The yield strength of AUstenite (NiTi alloy) is______________?

• 1. 100 Mpa
• 2. 240 Mpa
• 3. 560 Mpa
• 4. 700 Mpa

Question: A highly polished surface on a metallic dental restoration aids considerably in the prevention of the____________?

• 1. Dimensional change
• 2. Thermal conductivity
• 3. Warpage
• 4. Tarnish and corrosion

Question: Tublulence of molten gold is due to _____________?

• 1. Impurities in gold
• 2. Improper venting
• 3. A and B
• 4. None of the above

Question: In a patient with allergy to costume jewelry, which of the following is contraindicated______________?

• 1. High gold
• 2. Low gold
• 3. Palladium – Ag
• 4. Ni – Cr

Question: Indium in metal alloys_______________?

• 1. Improve bonding
• 2. Harden the metal ceramic Ag-Pd alloy
• 3. Both A and B
• 4. None of the above

Question: Mouth temperature waxes are_______________?

• 1. Iowa wax
• 2. Modeling wax
• 3. Green stick wax
• 4. None of the above

Question: Incomplete casting is the result of_____________?

• 1. More porous investment in the mould
• 2. Narrow sprue diameter
• 3. Hollow sprue pin
• 4. Large reservoir

Question: Glossy smooth margins of a casting are due to_____________?

• 1. Shrinkage of alloy on cooling
• 2. Investment breakdown
• 3. Incomplete wax elimination
• 4. Incomplete gas elimination

Question: Gypsum bonded investment should not be heated over______________?

• 1. 700°C
• 2. 1,300°C
• 3. 1,063°C
• 4. 900°C