651. Wash or corrective impression is done by______________?
A. Alginate
B. Impression paste
C. Impression plaster
D. Rubber base impression material
652. The plasticizers used in polyether impression material is_______________?
A. Colloidal silica
B. polyether polymer
C. Glycol ether
D. Di-vinyl poly (dimethyl siloxane)
653. In reversible hydrocolloid the property by which the transformation from sol to gel and gel to sol is a function of the_____________?
A. Concentration of potassium sulphate
B. Percentage composition by weight of water
C. Concentration of filler and plasticizer
D. Temperature
654. Alginates are_____________?
A. Gel
B. Sol
C. Hydrocolloid
D. Colloid
655. Syneresis is associated with______________?
A. Hydrocolloids
B. Zinc oxide eugenol
C. Elastomers
D. Plaster of paris
656. The advantage of ZOE impression paste_______________?
A. Has dimensional stability
B. Is easy manipulation
C. Does not adhere to tissues
D. Does not require special trays
657. Rinsing of the impression is important to________________?
A. Hydrate the impression
B. Remove saliva
C. Remove excess impression material
D. Accelerate the setting
658. Which is best material for RPD impression_______________?
A. Reversible hydroollioid
B. Irreversible hydrocolloid
C. Impression plaster
D. None of the above
659. Which of the following is not affected by saliva ?
A. Impression paste
B. Impression plaster
C. Silicon impression material
D. None of the above
660. Retarder in Zinc oxide eugenol is______________?
A. Zinc acetate
B. CaCl2
C. Alcohol
D. Glycerine
NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU