1.The main advantage of composites over unfilled direct filling resin is their_____________?
A. Higher solubility in saliva
B. Lower modulus of elasticity
C. Esthetic excellence
D. Lower thermal co-efficient of expansion
2. Composite has_______________?
C. Resin & Filler
3. Acrylic resins are used for______________?
A. Anterior restorations
B. Temporary bridges
C. Denture base
D. All of the above
4. To prevent porosity in self-cure acrylic resin, curing should be carried in______________?
A. Cold water
B. Hot water
C. Under tap water
D. Under vacuum pressure
5. Porosity present in a acrylic denture is usually the result of______________?
A. A prolonged curing cycle
B. Lack of sufficient pressure applied to flask
C. Insufficient acrylic resin monomer
D. Prolonged bench cooling after curing
6. Cross linking in denture base resin is contributed by_____________?
A. Glycol dimetharylate
B. Benzoyl peroxide
C. N-para toluidine
D. Methyl methacrylate
7. A material behaves in certain ways above and below the proportional limit on a stress strin curve, which of the following is correct______________?
A. Above the proportional limit a material function in a plastic manner, while below the proportional limit it behaves as an elastic
B. Above the proportional limit a material functions in an elastic manner, while below the proportional limit it behaves as an plastic
C. Either A or B
D. Neither A or B
8. Which of the following is correct________________?
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
9. Which of the following is present in the powder of the acrylic resin______________?
A. Methyl methacrylate
B. Benzoyl peroxide
D. D-methyl paratolouidine
10. Boiling point of methyl methacrylate________________?
A. B.P of water
B. < B.P of water
C. Equal of BP of water
D. Is at normal room temperature