Practicum-Quiz 1

1. What is the purpose of a reservoir or sprue?

• Eliminate porosity

• Produce metal porosity

• Eliminate Air

2. What kind of investment is used with ceramic alloys?

• Propane

• Thermal Expansion

• Phosphate-bonded investment

3. What kind of light is used in curing indirect composites?

• Infrared

• Halogen

• UV light

4.  How would you know if the degree of angle attached to the coping was correct?

• 45 degree angle

• 1. 90 degree angle

• 180 degree angle

5. What is the minimum width of the connector of 3 unit’s bridges?

• 2.0 mm

• 1. 3.5 mm

• 2.4 mm

6. What is the Diameter size of aluminum oxide for divesting?

• 1. 40 microns

• 1. 50 microns

• 1. 60 microns

7. In Angles classification, what kind of class that is limited to the facial surface of any of the teeth?

• Class III

• Class V

• Class I

8.  What is the cause of shrink spot porosity?

• 1. Thermal expansion

• Cause by trapped gasses in the molten metal

• 1. Cause of small holes or cracks

9. How many layers are applied in indirect composite when fabricating one crown?

• 3 layers

• 2 layers

• 1 layers

10. What type of margin is applicable for indirect composite?

• Chamfer margin

• 1. Shoulder margin

• 1. Bevel margin