Which of the following best describes the working time of impression material ?

Related Mcqs:

1. Alginate impression material is similar to Agar-agar impression material in the following respect________________?

   A. Gelation increase in both on increase in temperature
   B. Mixing time is increased to reduce the setting time
   C. Deformation during removal of impression occurs due to distortion of gel fibers
   D. Both can be re-used for fresh impressions

2. Which of the following best describes the working time of elastomeric impression material ?

   A. After the start of appearing elastic properties of impression material
   B. Just after the start of appearing elastic properties of impression material
   C. Just before the start of appearing elastic properties of impression material
   D. Loss of luster of impression material

3. Best impression material to be used for securing impression after crown preparation_______________?

   A. Alginate
   B. Agar
   C. Elastome
   D. Zno paste

4. Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?

   A. Addition polysilicone
   B. Condensation polysilicone
   C. Polyether
   D. Polysulfide

5. Agar impression materials differ from alginate impression materials in that the former sets by_______________?

   A. Mechanical action of saliva
   B. Physical change
   C. Evolution
   D. Chemical change

6. Which of the following impression material is elastic________________?

   A. Impression compound
   B. Zinc Oxide eugenol (ZOE) paste
   C. Wax
   D. Polyvinyl siloxane

7. Which of the following impression material is rigid ?

   A. Zinc oxide-eugenol
   B. Reversible hydrocolloid
   C. Alginate
   D. Polysulphide rubber

8. Which of the following is used as surface hardener in Impression material ?

   A. 2% Potassium sulfate
   B. 0.2% Potassium sulfate
   C. 2% sodium sulfate
   D. 4% Potassium sulfate

9. Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?

   A. Addition silicone < polyether < polysulfide < condensation silicone
   B. Addition silicone < polysulfide < Polyether < condensation silicone
   C. condensation silicone < polyether < polysulfide < Addition silicone
   D. condensation silicone < polysulfide < polyether < Addition silicone

10. Which of the following impression material requires a hardener ?

    A. Agar
    B. Alginate
    C. Elastomers
    D. Impression compound