Rubber base impressions are poured immediately as they_______________?

Related Mcqs:

1. The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?

   A. Boiling
   B. Condensation
   C. Vulconization
   D. Chain lengthening

2. Dimensional stability of hydrocolloid impressions may be achieved by_________________?

   A. Using less water powder ratio
   B. Storing the impression under water
   C. Prolonged manipulation
   D. Using humidor

3. Immediate pouring of impressions is most critical in_____________?

   A. Condensation polysillicon
   B. Addition Polysilicon
   C. Polyether
   D. A and B

4. The cross linking agent of polysulphide rubber base impression material is______________?

   A. Aromatic sulfonate esters
   B. Stannous octate
   C. Platinum salt catalyst
   D. Lead dioxide

5. Wax pattern is ideally invested immediately to decrease the dimensional changes caused by_______________?

   A. Decrease flow
   B. Continuous expansion
   C. Relaxation of the internal stresses
   D. Water loss

6. Isovolumetric relaxation ends immediately after________________?

   A. AV Valve closes
   B. When ventricular pressure falls below aortic pressure
   C. When ventricular pressure falls below atrial pressure
   D. None of the above

7. A type of immediately occuring reaction in which antigens combine with antibodies already attached to the surface of mast cells and basophils is called_____________?

   A. Type I hypersensitivity
   B. Type II hypersensitivity
   C. Type III hypersensitivity
   D. Type IV hypersensitivity

8. Rapid removal of rubber impression with a single firm motion results in____________________?

   A. Reduced dimensional instability
   B. Improved adhesion of the impression to the tray
   C. Minimal permanent deformation
   D. Reduced contamination by saliva

9. The base paste of the condensation poly sillicone has a low molecular weight dimethyl siloxane with a terminal-group_______________?

   A. Marcaptan group
   B. Hydroxyl group
   C. Silane group
   D. Virryl group

10. By product of condensation reaction between silicone base and alkyl silicate in presence of tin octate_______________?

    A. Ethyl alcohol
    B. Glycol
    C. Acetate
    D. Propanolol