Dental Materials(Medical Subjects ) Questions and Answers

Question 1. A material behaves in certain ways above and below the proportional limit on a stress strin curve, which of the following is correct______________?
  1.    Above the proportional limit a material function in a plastic manner, while below the proportional limit it behaves as an elastic
  2.    Above the proportional limit a material functions in an elastic manner, while below the proportional limit it behaves as an plastic
  3.    Either A or B
  4.    Neither A or B
Explanation:-
Answer: Option A. -> Above the proportional limit a material function in a plastic manner, while below the proportional limit it behaves as an elastic
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Which of the following is correct________________?
  1.    Type I and Type II gold can be heat treated and annealed
  2.    Type III and Type IV gold can be heat treated and annealed
  3.    Type I and IV gold can be heat treated and annealed
  4.    All the type of gold can be heat treated and annealed
Explanation:-
Answer: Option B. -> Type III and Type IV gold can be heat treated and annealed
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. The main advantage of composites over unfilled direct filling resin is their_____________?
  1.    Higher solubility in saliva
  2.    Lower modulus of elasticity
  3.    Esthetic excellence
  4.    Lower thermal co-efficient of expansion
Explanation:-
Answer: Option D. -> Lower thermal co-efficient of expansion
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. Which of the following is present in the powder of the acrylic resin______________?
  1.    Methyl methacrylate
  2.    Benzoyl peroxide
  3.    Hydroquinone
  4.    D-methyl paratolouidine
Explanation:-
Answer: Option A. -> Methyl methacrylate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. Boiling point of methyl methacrylate________________?
  1.    B.P of water
  2.    < B.P of water
  3.    Equal of BP of water
  4.    Is at normal room temperature
Explanation:-
Answer: Option A. -> B.P of water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. Composite has_______________?
  1.    Resin
  2.    Filler
  3.    Resin & Filler
  4.    None
Explanation:-
Answer: Option C. -> Resin & Filler
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. To prevent porosity in self-cure acrylic resin, curing should be carried in______________?
  1.    Cold water
  2.    Hot water
  3.    Under tap water
  4.    Under vacuum pressure
Explanation:-
Answer: Option D. -> Under vacuum pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Acrylic resins are used for______________?
  1.    Anterior restorations
  2.    Temporary bridges
  3.    Denture base
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. Cross linking in denture base resin is contributed by_____________?
  1.    Glycol dimetharylate
  2.    Benzoyl peroxide
  3.    N-para toluidine
  4.    Methyl methacrylate
Explanation:-
Answer: Option A. -> Glycol dimetharylate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Porosity present in a acrylic denture is usually the result of______________?
  1.    A prolonged curing cycle
  2.    Lack of sufficient pressure applied to flask
  3.    Insufficient acrylic resin monomer
  4.    Prolonged bench cooling after curing
Explanation:-
Answer: Option B. -> Lack of sufficient pressure applied to flask
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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