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
Related Mcqs:
- Powders of dental plaster and dental stone differ mainly in____________?
A. Solubility
B. Shelf life
C. Chemical formula
D. Particle porosity - 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 - 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 - 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 - The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
A. 19
B. 20
C. 21
D. 26 - The main ingredient in dental plaster in_______________?
A. Calcium sulphate hemihydrate
B. Calcium phosphate
C. Calcium anhydrate
D. Calcium sulphate dihydrate - Type III Dental gypsum is__________________?
A. Class II stone
B. Densite
C. Class I stone or hydrocal
D. Model or lab plaster - A balanced diet consists of______________?
A. 20% proteins, 25% fats, 50% carbohydrates
B. 20% proteins, 35% fats, 45% carbohydrates
C. 25% proteins, 25% fats, 50% carbohydrates
D. 35% proteins, 15% fats, 50% carbohydrates - Which of the following phases of dental amalgam has minimum strength____________?
A. Gamma 1
B. Gamma 2
C. Epsilon 1
D. Gamma 3 - The base constituents of dental waxes come from three main sources except______________?
A. Animal
B. Mineral
C. Insect
D. Vegetable
