Dental Materials MCQs

Page No. 34

Syneresis is associated with______________?


aHydrocolloids

✓


bElastomers

✖


cZinc oxide eugenol

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dPlaster of paris

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View Answer Hydrocolloids

Alginates are_____________?


aSol

✖


bGel

✖


cHydrocolloid

✓


dColloid

✖


View Answer Hydrocolloid

In reversible hydrocolloid the property by which the transformation from sol to gel and gel to sol is a function of the_____________?


aConcentration of filler and plasticizer

✖


bPercentage composition by weight of water

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cConcentration of potassium sulphate

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dTemperature

✓


View Answer Temperature

The plasticizers used in polyether impression material is_______________?


apolyether polymer

✖


bColloidal silica

✖


cGlycol ether

✓


dDi-vinyl poly (dimethyl siloxane)

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View Answer Glycol ether

Wash or corrective impression is done by______________?


aAlginate

✖


bImpression paste

✓


cImpression plaster

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dRubber base impression material

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View Answer Impression paste

K2SO4 in agar-agar is for_______________?


aAccelerating the setting stage of gypsum

✓


bIncrease strength

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cGive dimensional stability

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dNone of the above

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During setting of alginate impression materials________________?


aTrisodium phosphate reacts with sodium sulphate

✖


bTrisodium phosphate reacts with calcium sulphate

✓


cColloidal changes to sol

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dMaterial in contact with soft tissues sets last

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Perforated impression tray are used for_______________?


aAlginate

✓


bAgar-agar

✖


cZinc oxide-eugenol

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dImpression compound

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View Answer Alginate

Agar is prepared from_______________________?


aBullock heart

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bChemicals

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cSea weed

✓


dChick cells

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View Answer Sea weed

Lenolin is added is ZOE paste to______________?


aDecrease flow

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bIncrease flow

✓


cAccelerate reaction

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dDecrease irritation due to eugenol

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View Answer Increase flow

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