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.Management Sciences
Category: Impression Materials
Impression material that Do NOT harden by chemical reaction_______________?
A. Zinc oxide eugenol
B. Impression compound
C. Alginate
D. Plaster of paris
Trisodium phosphate added to alginate contributes towards_______________?
A. increasing the working time of alginate impression material
B. Acts as an accelerator
C. Initiating the setting reaction
D. Provides gel strength
Which of the following impression material requires a hardener ?
A. Agar
B. Alginate
C. Elastomers
D. Impression compound
Which of the following impression material is rigid ?
A. Zinc oxide-eugenol
B. Reversible hydrocolloid
C. Alginate
D. Polysulphide rubber
Which of the following is true about Agar hydrocolloid impression material ?
A. Liquefies between 71 – 100°C
B. Solidfies between 50 – 70°C
C. Facilitates fabrication of metal dyes
D. Cannot register fine surface details
Alginates are made dust free by adding______________?
A. Glycol
B. Glyecrol
C. Glutamic acid
D. alcohol
The impression with the least dimensional change upon disinfection is_______________?
A. Addition poly silicone
B. Agar-agar
C. Polysulphide
D. Polyether
The impression materials with lowest viscosity is_____________?
A. Plaster of paris
B. Agar – agar
C. Zinc oxide eugenol
D. Elastomers
Best material for duplicating cast is_______________?
A. Agar-agar
B. Alginate
C. Zinc oxide eugenol
D. Plaster of paris
Rough and irregular surface produced on the impression is because of_______________?
A. Air incorporated during mixing
B. Improper application of pressure during impression making
C. Presence of excessive saliva in impression area
D. Due to improper ratio of polymer and monomer
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