A. Decrease flow

C. Decrease irritation due to eugenol

D. Accelerate reaction

A. <1%

B. 5 to 10%

D. 2 to 3%

B. Has a W / P of 0.2

C. Is wet calcined hemihydrate

D. Is a hamihydrate

B. Using less water powder ratio

C. Storing the impression under water

D. Prolonged manipulation

A. Initiating the setting reaction

B. Provides gel strength

D. Acts as an accelerator

B. Polyether

C. Condensation silicone

D. Polysulfide

A. Silver-Palladium

B. Nickel-Titanium

C. Nickel-Chromium

A. Reversible hydrocolloid

B. Impression plaster

C. Silicone impression material

B. Air incorporation in the mix

C. High speed accelerator

D. Not waiting for 20 min before pouring

B. Stone plaster

C. Model plaster

D. Impression plaster

B. Alginate

C. Polyether

D. Agar-agar

A. Speed the burnout process

B. Replace casting wax

D. Lower the melting point

B. inch

C. 3/8 inch

D. one inch

B. Impression plaster

C. Impression paste

D. Silicon impression material

A. Decrease porosity

B. They react with the porcelain opaque layer, which masks the metal

D. Improves the thermal expansion between the metal and porcelain

A. 8%

B. 4%

D. 10%

A. 2% potassium sulphate is accelerator

C. Citrates are retarders

D. Rapid spatulation results in decreased setting time

A. Wax expansion

C. Thermal expansion

D. Hygroscopic expansion

A. Orthorhombic anhydrate

B. Calcium sulphate dihydrate

C. Beta hemihydrates

A. 700 Mpa

B. 240 Mpa

D. 100 Mpa

A. None of the above

B. Impression plaster

C. Reversible hydroollioid

B. Vegetable

C. Insect

D. Mineral

B. Contraction

C. Strength

D. Decrease strength

A. To felicitate wetting of ring liner

B. To felicitate mixing investment

D. For better wax elimination

A. Potassium alginates

C. Water loving impression materials

D. Hydrophilic

A. G.V. Black

C. Bowen

D. Buonocore

B. It will take up water and expand if kept wet

C. It should be rapidly displaced from the mouth

D. It will shrink as a result of syneresis

A. Surface hardness

B. Proportion limit

C. Strength

B. Slight rocking of the impression to disengage it from the undercut

C. Supporting the impression along with the tray to prevent disengaging of the tray alone

D. Wetting the periphery of the impression with moist cotton to break the peripheral seal

A. Rapid solidification of metal

C. Difficulty in removing casting from investment

D. No place for reservoirs

A. Prevent the oxidation of the metal during melting

C. None of the above

D. increase the melting point of the flux

A. low spring back

C. Minimal spring back

D. Unreliable spring back

A. Liquid

B. Solid

D. Gas

A. Low strength

C. Low melting point

D. Low cost

B. Plasticizer

C. Water

D. Mineral oil

B. Pin hole porosity

C. Back pressure porosity

D. Micro porosity

A. Addition silicone < polysulfide < Polyether < condensation silicone

C. condensation silicone < polysulfide < polyether < Addition silicone

D. condensation silicone < polyether < polysulfide < Addition silicone

A. Elastomers

B. Alginate

D. Impression compound

A. Class II stone/Densite

B. Class I stone / Hydrocal

D. Model plaster

A. Water content

C. Eugenol content

D. Their use

A. Air incorporated during mixing

C. Improper application of pressure during impression making

D. Presence of excessive saliva in impression area

A. Copper cynide

B. Silver cyanide

C. Ionic copper

A. Polysulphide

C. Condensation silicone

D. Addition silicone

A. Syringe agar and impression compound

C. Chilled alginate and impression compound

D. Syringe agar and tray agar

A. To construct clasps for partial dentures

C. To replace internal gold restorations

D. To strength amalgam

A. Shrinkage

B. Gelation

C. Water absorption

A. Plaster of paris

C. Zinc oxide eugenol

D. Elastomers

A. Agar

C. Imp. Compound

D. Alginate

A. Cannot register fine surface details

B. Solidfies between 50 70C

C. Facilitates fabrication of metal dyes

A. Model or lab plaster

B. Densite

C. Class II stone