B. Retard the heating of the investment

C. All of the above

D. Facilitate venting of the mold

A. Zinc oxide eugenol

B. Plaster of paris

D. Elastomers

B. Investment

C. Plaster

D. Stone

A. Syneresis

B. Gelation

D. Hysteresis

A. Class I stone / Hydrocal

B. Class II stone/Densite

D. Model plaster

A. Soft hardening treatment

B. Hard hardening treatment

C. Precipitating heat treatment

A. Acts as plasticizer

B. Helps as surfactant

D. Acts as a catalyst

A. Putty wash technique of impression reduces dimensional change of setting

B. Shear thinning is related to viscosity of non phase impression material

D. Improper mixing of material can cause permanent deformation of impression

B. 900C

C. 1,063C

D. 1,300C

A. None of the above

B. Light body and putty used at the same time

C. Light body first and putty later

A. Constitutional supergriting

B. Constitutional superconductivity

D. Constitutional supergraining

B. Zinc Sulphate & Eugenol

C. Glycerin

D. Zinc chloride & Eugenol

A. Too high pressure during casting

B. Prolonged heating:

C. Water film contamination

B. Suckback porosity

C. Microporosity

D. Localized shrinkage porosity

A. Increase strength

C. Give dimensional stability

D. None of the above

B. Rapid spatulation results in decreased setting time

C. Citrates are retarders

D. 2% potassium sulphate is accelerator

A. 100C

B. 43.5C

D. 65C

A. Plaster of paris

B. Alginate

D. Zinc oxide eugenol

A. Redden the alloy

B. Decrease its tarnish resistance

D. Decrease its strength and ability to be hardened

A. Colloid

C. Gel

D. Sol

B. Hardness

C. Tensile strength

D. Proportional limit

A. All of the above

B. Ease of construction of denture

D. Preserving the sulci

A. Potassium alginate

B. Trisodium phosphate

D. Sodium alginate

A. Propanolol

B. Acetate

D. Glycol

B. Testing the purity of noble metals

C. Testing the strength of plaster of paris

D. Testing the metal hardness

A. Impression compound

B. Alginate

D. Elastomers

A. 100%

C. 50%

D. 25%

B. Equal

C. More

D. Depends on the alloy type

A. Potassium fluoride

B. Aluminium sulfate

C. Sodium fluoride

A. Concentration of potassium sulphate

B. Concentration of filler and plasticizer

C. Percentage composition by weight of water

A. Improper application of pressure during impression making

B. Presence of moisture in impression area

C. Air incorporated during mixing

A. Increasing the mould metal temperature difference

C. All of the above

D. Increasing the flow of molten metal

A. K₂ So₄

C. Na2 So4

D. Nacl

A. Natural gas

C. Hydrogen

D. Acetylene

B. Recovery stage

C. Grain growth stage

D. All of the above

A. 25%

C. 0%

D. N 25%

B. Marcaptan group

C. Virryl group

D. Silane group

A. Hydrocolloids

B. Silicate

D. Amalgam

B. Low melting point

C. Low cost

D. Low strength

A. Accelerate reaction

B. Decrease irritation due to eugenol

C. Decrease flow

A. Alginate

C. Agar-agar

D. Polyether

A. Bowen

C. Buonocore

D. G.V. Black

B. Air incorporated during mixing

C. Presence of excessive saliva in impression area

D. Improper application of pressure during impression making

A. Alginate

B. Condensation silicone

D. Addition silicone

A. 20C to 25C

B. 27C to 33C

D. 55C to 60C

A. Chromium

B. Molybdenum

C. Nickel

B. Rouge

C. Fluoride

D. Boric acid

A. High Fusion Temperature

B. Co-efficient of Thermal Expansion

D. High Molecular Weight

A. Casts

C. Impressions

D. Die

A. Green strength

C. Tensile strength

D. Wet strength