A. Accelerating the setting stage of gypsum
B. Increase strength
C. Give dimensional stability
D. None of the above
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 - The usual concentration of agar used in agar medium is___________________?
A. 10%
B. 2%
C. 5%
D. 15% - Agar syringe material can be used with/as______________?
A. Agar
B. Alginate impression material
C. Both of the above
D. Primary impression - Gelation temparature of agar is between________________?
A. 20°C to 25°C
B. 27°C to 33°C
C. 37°C to 50°C
D. 55°C to 60°C - Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
A. Borax
B. Water
C. Sulfates
D. Carbonates - Which of the following is true about Agar hydrocolloid impression material ?
A. Liquefies between 71 – 100°C
B. Solidfies between 50 – 70°C
C. Facilitates fabrication of metal dyes
D. Cannot register fine surface details - Agar is prepared from_______________________?
A. Bullock heart
B. Chemicals
C. Sea weed
D. Chick cells - 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 - Blood agar is________________?
A. Simple media
B. Transport media
C. Enriched media
D. Differential media - Perforated impression tray are used for_______________?
A. Alginate
B. Zinc oxide-eugenol
C. Agar-agar
D. Impression compound
