1. One disadvantage of dental porcelain restorations is: expansion poor esthetics radioactivity brittleness 2. the strength of gypsum bonded investment is dependednt upon silica content gypsum content copper content carbon content 3. what filler is used in impression compound “alginate” sodium bicarbonate calcium alginate sodium phosphate diatomaceous earth 4. Cavity Varnish is used with: Amalgam Compomer Glass Ionomer Composite 5. the main advantage of a natural glaze rather than an applied glaze is that the natural glaze offers best esthetics is more permanent requires a lower firing temperature is easier to achieve 6. Which material is sensitive to Sulfur contamination from latex gloves: Polyether Addition silicone Polysulfide Agar 7. in size the largest porosities in a casting are of which type microporosity suck back pin hole gas inclusion 8. The aramid and ribbond fibers are used to strengthen Acrylic resin Glass ionomer Ceramic Polyether material 9. a thinner mix of gypsum bondeded investment will result in produce a smoother casting decrease setting expansion increases setting expansion increases thermal expansion 10. Which of the following is true statements regarding the polishing of amalgam? it prevents tarnishing of the restoration it should be done with a dry polishing powder it should be done about 10 minutes after placement occlusion should not be checked prior to polishing 11. Which of the following is used for making blades and sharp surgical instruments: none of the above Ferrite steel Austenitic steel martensitic steel 12. Function of molybdenum in base metal alloys? Decreases strength Increase CTE Decrease corrosion resistance Increases strength 13. The relative amount of lightness or darkness in a color is referred to as: intensity chroma hue value 14. when selecting the color of cememt to use for cementing a porcelain jacket crown the powder being tested is best mixed with only water glycerine water solution cement liquid alcohol 15. Which of the following cements provide maximum resistance to decalcification while placing bands on molar GIC Polycarboxylate Silicate Zinc phosphate 16. Shrinkage porosity is related to Inlay wax Sprue size Temperature Molten metal 17. strain hardening of a metal decreases its strength proportional limit surface hardness resistance to corrosion 18. Use of type II ZOE cement: Temporary cementation Intermediate restoration Temporary restoration Permanent cementation 19. If multiple firing is done to opaque layer of dental porcelain, then it becomes? Too glazed Cracked Too Smooth Become more opaque 20. Hardening heat treatment for gold copper alloys involves Quenching immediately after recrystallisation Quenching immediately after casting Heating to 700 degree C for 10 min followed by quenching Heating to 350 degree C for 15-30 min followed by quenching Loading … Question 1 of 20
