Medical Mcqs

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
Setting of POP is result of______________?
  • (A)  Difference in solubility of CaSo4 ½ H2O + CaSO4+ 2H2O
  • (B)  Reaction between CaSO4+ 2H2O and water
  • (C)  Nucleation and growth of CaSo4 ½ H2O crystals
  • (D)  Reaction between hemihydrate and hihydrate
Gillmore needle is used for_______________?
  • (A)  Testing the strength of plaster of paris
  • (B)  Evaluating the setting time of plaster of pris
  • (C)  Testing the metal hardness
  • (D)  Testing the purity of noble metals