- (A) Mercaptan
- (B) Silicone
- (C) Reversible hydrocolloid
- (D) A and B
Medical Mcqs
- (A) Low thermal conductivity
- (B) High flow property
- (C) Degradation is presence of moisture
- (D) Remain distortion free up to 72 hrs. pouring can be safely delayed
- (A) Increased spatulation
- (B) Adding potassium sulfate
- (C) Less water powder ratio
- (D) Allowing setting under water
- (A) Not waiting for 20 min before pouring
- (B) High speed accelerator
- (C) Air incorporation in the mix
- (D) All of the above
- (A) Rapid spatulation results in decreased setting time
- (B) 2% potassium sulphate is accelerator
- (C) Citrates are retarders
- (D) All of the above
- (A) Chemical reaction
- (B) Cold
- (C) Heat
- (D) Pressure
- (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) 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) Moisture absorption
- (B) Temperature lag between gelation and liquefaction temperature
- (C) Phenomenon of conversion of gel into sol
- (D) All of the above
- (A) Marcaptan group
- (B) Hydroxyl group
- (C) Silane group
- (D) Virryl group
