A. Setting time
B. Setting expansion
C. Hardness of the set product
D. None of the above
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 - 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 - 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 - R-RNA is mainly produced mainly in___________?
A. Nucleus
B. Nucleolus
C. Ribosome
D. Endoplasmic reticulum - 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 - 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 - The strength of gypsum prouducts is generally expressed in terms of______________?
A. Tensile strength
B. Wet strength
C. Green strength
D. compressive strength - 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 - Type I gypsum product is also called_______________?
A. Impression plaster
B. Class I stone / Hydrocal
C. Class II stone/Densite
D. Model plaster
