A. Impression plaster
B. Model plaster
C. Stone plaster
D. Die stone
Related Mcqs:
- 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 - The most commonly used accelerator in gypsum product is___________________?
A. Sodium fluoride
B. Potassium fluoride
C. Potassium sulfate
D. Aluminium sulfate - 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 - Type I gypsum product is also called_______________?
A. Impression plaster
B. Class I stone / Hydrocal
C. Class II stone/Densite
D. Model plaster - 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 - Modiffiers are added to gypsum mainly to_______________?
A. Modify setting time
B. Modify setting expansion
C. Modify strength
D. Decrease the porosity - ADA specification number of gypsum products are described under____________?
A. 1
B. 4
C. 12
D. 25 - Type III Dental gypsum is__________________?
A. Class II stone
B. Densite
C. Class I stone or hydrocal
D. Model or lab plaster - Gypsum is used for________________?
A. Impressions
B. Casts
C. Die
D. Casts and Dies - 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
