Type III Dental gypsum is__________________?

Related Mcqs:

1. The product, which is obtained by calcining gypsum under steam pressure at 120-130°C or by dehydrating gypsum in the presence of sodium succinate is_______________?

   A. Alpha – hemihydrates B. Beta – hemihydrates C. Calcium sulphate dihydrate D. Orthorhombic anhydrate...

2. Powders of dental plaster and dental stone differ mainly in____________?

   A. Solubility B. Shelf life C. Chemical formula D. Particle porosity...

3. The main difference between dental stone and dental plaster is______________?

   A. Chemical composition B. Self life C. Sharpe and size of particles D. Solubility in water...

4. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?

   A. Have less marginal breakdown B. Are workable at lower Hg-alloy ratio C. Have a higher ratio of tensile to compressive strength D. Have less resistance to tarnish and corrosion...

5. The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

   A. 19 B. 20 C. 21 D. 26...

6. As per DNA No. 25, minimum amount of setting expansion required for type V gypsum products_______________?

   A. 0.05 B. 0.10 C. 0.15 D. 0.20...

7. Type I gypsum product is also called_______________?

   A. Impression plaster B. Class I stone / Hydrocal C. Class II stone/Densite D. Model plaster...

8. Accelerators and retarders are used with gypsum products mainly to control_______________?

   A. Setting time B. Setting expansion C. Hardness of the set product D. None of the above...

9. Modiffiers are added to gypsum mainly to_______________?

   A. Modify setting time B. Modify setting expansion C. Modify strength D. Decrease the porosity...

10. Gypsum product having least expansion_____________?

    A. Impression plaster B. Model plaster C. Stone plaster D. Die stone...