Binder in phosphate bonded investment is______________?

Related Mcqs:

1. Binder used in Gypsum investment is_________________?

   A. Silica
   B. Quartz
   C. Cristobolite
   D. Calcium sulphate monohydrate

2. Gypsum bonded investment should not be heated over______________?

   A. 700°C
   B. 1,300°C
   C. 1,063°C
   D. 900°C

3. Quartz is added to gypsum bonded investment to______________?

   A. Increase the strength
   B. Counter balance contraction of gypsum during heating
   C. aid in hygroscopic expansion
   D. Increase the shelf life of investment

4. The best pickling solution for gypsum bonded investment is_______________?

   A. Hydrochloric acid
   B. Nitric acid
   C. Sulphuric acid
   D. Phosphoric acid

5. A thinner mix of a gypsum bonded investment will_______________?

   A. Produce a smoother casting
   B. Decrease setting expansion
   C. Increase setting expansion
   D. Increase thermal expansion

6. Advantage of zinc phosphate over GIC is______________?

   A. High compressive strength
   B. Tensile strength
   C. High modulus of elasticity
   D. Diametral strength

7. The setting of zinc phosphate is accelerated by_____________?

   A. Adding a drop of water
   B. Increasing mixing time
   C. Cooling the slab
   D. Adding a drop of oleic acid

8. The setting of zinc phosphate may be retarded by ?

   A. Increased in the ratio of powder to liquid
   B. Diluting the liquid with water
   C. Increase the addition of powder to liquid
   D. Decrease the addition of powder to liquid

9. Minimum thickness for type I zinc phosphate cement should be_______________?

   A. 15 microns
   B. 25 microns
   C. 50 microns
   D. 100 microns

10. Trisodium phosphate added to alginate contributes towards_______________?

    A. increasing the working time of alginate impression material
    B. Acts as an accelerator
    C. Initiating the setting reaction
    D. Provides gel strength