A. Moisture absorption
B. Temperature lag between gelation and liquefaction temperature
C. Phenomenon of conversion of gel into sol
D. All of the above
Dental Materials
Dental Materials Mcqs for preparation. These Mcqs are helpful for Medical students. Dental Materials Multiple Choice Questions (MCQ) for entrance examinations and other competitive examinations for all Experienced, Freshers and Students.
A. Adding a small amount of glycerine
B. Adding a small amount of water
C. Altering the amounts of the two pastes used
D. Cooling mixing slab
A. They evolve hydrogen when cast if they are not fully cured
B. They exhibit a very low setting shrinkage
C. They have a lower tear resistance than polysulphide rubbers
D. They set by condensation polymerisation
A. Chemical reaction
B. Cold
C. Heat
D. Pressure
A. Rapid spatulation results in decreased setting time
B. 2% potassium sulphate is accelerator
C. Citrates are retarders
D. All of the above
A. Not waiting for 20 min before pouring
B. High speed accelerator
C. Air incorporation in the mix
D. All of the above
A. Increased spatulation
B. Adding potassium sulfate
C. Less water powder ratio
D. Allowing setting under water
A. Na2 So4
B. Nacl
C. Citrales
D. K2 So4
A. Impression plaster
B. Model plaster
C. Stone plaster
D. Die stone
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
