Materials which has high compressive strength and low tensile strength is classified with property of________________?

Related Mcqs:

1. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?

   A. 80 Mpa
   B. 140 Mpa
   C. 260 Mpa
   D. 510 Mpa

2. Ultimate tensile strength refers to_________________?

   A. Stress before rupture
   B. Stress after rupture
   C. Longitudinal compressive strength
   D. Horizontal compressive strength

3. Brazilian test is used to determine the ultimates tensile strength of_________________?

   A. Ductile materials
   B. Flexible materials
   C. Brittle materials
   D. Malleable materials

4. For dental amalgam, the elastic modulus and tensile strength is______________?

   A. 40 Gpa and 60 – 100 Mpa
   B. 21 Gpa and 27 – 55 Mpa
   C. 350 Gpa and 10 – 120 Mpa
   D. 360 Gpa and 125 – 130 Mpa

5. The rapid decrease in tensile strength and increase in ductility of a wrought metal is seen in which stage of annealing ?

   A. Recovery stage
   B. Recrystallisation stage
   C. Grain growth stage
   D. All of the above

6. Dental porcelains are crystalline materials of________________?

   A. Rubber
   B. Plastic
   C. Organic substances
   D. Glass

7. The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________?

   A. Hydrocolloids, silicones, polyether, polysulfide
   B. Silicones, hydrocolloids, polyether, polysulfide
   C. Polysulfide, hydrocolloids, silicones, polyether
   D. Hydrocolloids, polyether, silicones, polysulfide

8. Compressive stress is computed by dividing the external force by the_______________?

   A. Area of the test specimen upon which the weight rests
   B. Elasticity of the test specimen in strain
   C. Length of the test specimen beneath the force
   D. Strain of the test specimen per unit length

9. 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

10. High strength amalgam is achieved by_____________?

    A. Maximum matrix and minimum alloy phase
    B. Minimum matrix and maximum alloy phase
    C. Maximum matrix phase
    D. Minimum alloy phase