A. Chemical composition
B. Self life
C. Sharpe and size of particles
D. Solubility in water
Related Mcqs:
- Powders of dental plaster and dental stone differ mainly in____________?
A. Solubility
B. Shelf life
C. Chemical formula
D. Particle porosity - 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 - The main ingredient in dental plaster in_______________?
A. Calcium sulphate hemihydrate
B. Calcium phosphate
C. Calcium anhydrate
D. Calcium sulphate dihydrate - The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
A. 19
B. 20
C. 21
D. 26 - Balanced stone is dental stone_______________?
A. Which undergoes rapid expansion
B. In which accelerators or retarders have been added according to need
C. In which amount of water of hydration is controlled
D. In which the crystals are all of uniform size - 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 - 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 - Plaster of paris is mixed in________________?
A. Plastic bowl
B. Rubber bowl
C. Glass bowl
D. Metal bowl - Impression plaster containing potato starch is called______________?
A. Plaster of paris
B. Soluble plaster
C. Anti – expansion solution
D. Die stones - 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
