Gypsum product having least expansion_____________?

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. The most commonly used accelerator in gypsum product is___________________?

   A. Sodium fluoride B. Potassium fluoride C. Potassium sulfate D. Aluminium sulfate...

3. The function of 2% potassium sulphate in a gypsum product is_____________?

   A. To regulate the setting expansion B. Regulate setting time C. Acts as retarder D. None...

4. Type I gypsum product is also called_______________?

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

5. 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...

6. Modiffiers are added to gypsum mainly to_______________?

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

7. ADA specification number of gypsum products are described under____________?

   A. 1 B. 4 C. 12 D. 25...

8. Type III Dental gypsum is__________________?

   A. Class II stone B. Densite C. Class I stone or hydrocal D. Model or lab plaster...

9. Gypsum is used for________________?

   A. Impressions B. Casts C. Die D. Casts and Dies...

10. The setting expansion of gypsum products can be reduced by________________?

    A. Increased spatulation B. Adding potassium sulfate C. Less water powder ratio D. Allowing setting under water...