- (A) Calcium sulphate hemihydrate
- (B) Calcium phosphate
- (C) Calcium anhydrate
- (D) Calcium sulphate dihydrate
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- (A) Setting time
- (B) Setting expansion
- (C) Hardness of the set product
- (D) None of the above
- (A) Investment
- (B) Hydrocolloids
- (C) Amalgam
- (D) Silicate
- (A) Sodium fluoride
- (B) Potassium fluoride
- (C) Potassium sulfate
- (D) Aluminium sulfate
- (A) Stone
- (B) Plaster
- (C) Investment
- (D) All of the above
- (A) Altering P / L Ratio
- (B) Altering temperature of mixing water
- (C) Speed and length of hand spatulation
- (D) Addition of accelerators and retarders
- (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
- (A) H2O interferes with hygroscopic expansion
- (B) H2O inhibits polymerization of dental resin
- (C) H2O interferes with Crystallization of dihydrate
- (D) Gypsum is slightly soluble in water and the surface of the cast will be eroded
- (A) Modify setting time
- (B) Modify setting expansion
- (C) Modify strength
- (D) Decrease the porosity
- (A) 10 um
- (B) 15 um
- (C) 30 um
- (D) 0.1 um
