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

Related Mcqs:

1. 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...

2. 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...

3. The strength of the gypsum specimen when the water in excess of that required for the hydrate of the hemihydrate is left in the specimen is called____________?

   A. Dry strength B. Green strength C. Water strength D. Compressive strength...

4. Setting expansion is advantageous in__________________?

   A. Casts B. Models C. Investment D. Dies...

5. Type III Dental gypsum is__________________?

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

6. Type I gypsum product is also called_______________?

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

7. The β (Beta) hemihydrate of gypsum requires more water to float its powder particles because______________?

   A. They are more regular in shape and dense B. They are more regular in shape and highly porous C. They are more irregular in shape and porous D. They are more dense and prismatic in shape...

8. 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...

9. The strength of gypsum prouducts is generally expressed in terms of______________?

   A. Tensile strength B. Wet strength C. Green strength D. compressive strength...

10. Gypsum is used for________________?

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