A. Low thermal conductivity
B. Crystalline structure
C. Formation of cross linkage with heating
D. High fusion temperature
Related Mcqs:
- 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 - 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 - Best impression material to be used for securing impression after crown preparation_______________?
A. Alginate
B. Agar
C. Elastome
D. Zno paste - 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 - Impression compound has which of the following characteristic property ?
A. Low thermal conductivity
B. High flow property
C. Degradation is presence of moisture
D. Remain distortion free up to 72 hrs. pouring can be safely delayed - Impression compound is characterized by all of the following except_______________?
A. Warps at room temperature
B. Is a thermoset material
C. Shows increased flow when kneaded with water
D. Low coefficient of thermal conductivity - Minimum flow of Type-I impression compound at mouth temperature is___________________?
A. 4%
B. 6%
C. 8%
D. 10% - Which of the following is correct glass transition temperature of Impression compound ?
A. 43.5°C
B. 39°C
C. 65°C
D. 100°C - All of the following statements about Type II silicon impression material are true EXCEPT_______________?
A. They evolve hydrogen when cast if they are not fully cured
B. They exhibit a very low setting shrinkage
C. They have a lower tear resistance than polysulphide rubbers
D. They set by condensation polymerisation - Which of the following impression material is rigid ?
A. Zinc oxide-eugenol
B. Reversible hydrocolloid
C. Alginate
D. Polysulphide rubber
