Plaster of paris is mixed in________________?

Related Mcqs:

1. In plaster of paris the setting time is primarily altered by_________________?

   A. Altering P / L Ratio B. Altering temperature of mixing water C. Speed and length of hand spatulation D. Addition of accelerators and retarders...

2. Plaster of paris _____________?

   A. Is wet calcined hemihydrate B. Has porous and irregular crystals C. Is a – hamihydrate D. Has a W / P of 0.2...

3. Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?

   A. CaO B. CaCO3 C. (CaSO4)2-½H2O D. CaSO4-2H2O...

4. Water powder ratio of dental stone and plaster is respectively_________________?

   A. 0.28 and 0.6 B. 0.6 and 0.28 C. 0.6 and 3.2 D. 0.28 and 0.98...

5. Green strength with reference to plaster means_____________?

   A. Dry strength B. Compressive strength C. Strength of dental stone due to green colour D. The wet strength...

6. The main ingredient in dental plaster in_______________?

   A. Calcium sulphate hemihydrate B. Calcium phosphate C. Calcium anhydrate D. Calcium sulphate dihydrate...

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

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

8. Impression plaster containing potato starch is called______________?

   A. Plaster of paris B. Soluble plaster C. Anti – expansion solution D. Die stones...

9. 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...

10. Plaster mix____________?

    A. Rapid spatulation results in decreased setting time B. 2% potassium sulphate is accelerator C. Citrates are retarders D. All of the above...