8751. The effects associated with cold working can be eliminated by a heat treatment called______________?
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A. Homogenization heat treatment

B. Annealing heat treatment

C. Age hardening heat treatment

D. Solution heat treatment

8752. Most mucostatic among the following_____________?
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A. Impression compound

B. ZOE paste

C. Elastomer

D. Alginate

8753. Syringe material is______________?
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A. Medium viscosity elastomer

B. Medium & low viscosity elastomer

C. High viscosity elastomer

D. Low viscosity elastomer
8755. Mouth temperature waxes are_______________?
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A. None of the above

B. Green stick wax

C. Iowa wax

D. Modeling wax

8757. All of the following statements about cast cobalt alloy are true EXCEPT_____________?
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A. They are more rigid than gold alloys

B. They have a lower proportional limit than gold alloys

C. They have a modulus of elasticity twice that of gold alloys

D. They have higher ductility than gold alloys
8758. Cause of expansion in zinc containing amalgam is_____________?
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A. Zinc and water

B. Hydrogen

C. Nascent oxygen

D. Water

8759. Porosity in porcelain at condensation stage depends on_________________?
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A. None of the above

B. Shape and size of particle

C. Uniform distribution of particle size

D. Number of particles

8761. Decrease in creep occurs in_______________?
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A. Under trituration or over trituration of amalgam

B. Decreases with condensation pressure

C. Increase with condensation pressure

D. Cannot be predictable

8762. The preferred material for repair of fractured denture base is______________?
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A. Heat curve resin

B. Chemically cure resin

C. Vinyl resin

D. Light cure resin

8763. The principle application of zinc phosphate cement is_____________?
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A. As a temporary filling material

B. It has less occlusal wear

C. In final cementation

D. As temporary cementation

8764. Which glass ionomer cement develops early resistance to water intake on setting ?
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A. Resin modified glass ionomer cement

B. Reinforced auto care glass ionomer cement

C. Ceramic reinforced glass ionomer cement

D. Compomer

8765. Flux used in dental ceramic is________________?
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A. Kaolin

B. Boric oxide

C. Silica

D. Alumina

8766. Electralloy is an alloy of________________?
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A. Cobalt and Chromium

B. Gold and Calcium

C. Tin and chromium

D. Gold and Platinum

8767. Cohesion of gold foil is an example of______________?
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A. Wedging

B. Atomic attraction and welding

C. Adaptation

D. Annealing

8770. Amalgam means_____________?
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A. A metallic powder composed of silver, tin, copper and zinc

B. An alloy of two or more metals one of which is mercury

C. An alloy of two or more metals that have been dissolved in each other in the molten state

D. A metallic substances in powder or tablet from that is mixed with mercury

8771. Which of the following does not occur in High Copper Amalgam ?
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A. Electrochemical Corrosion

B. Chemical Corrosion

C. Corrosion does not occur at all

D. Penetrating Corrosion
8772. Which of the following cements is most kind to pulp ?
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A. Glass ionomer

B. Resin cement

C. Polycarboxylate

D. Silicate

8774. The effect of zinc oxide-eugenol on the pulp ?
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A. Is irritating

B. Has no effect

C. Is sedating

D. Encourages pulpal fibrosis

8776. The tarnished layer of silver amalgam consists of________________?
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A. Chlorides of tin

B. All of the above

C. Oxides of tin

D. Sulphides of silver
8777. Powdered gold is___________________?
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A. Made by milling pure gold ingots

B. Made by electrolytic precipitation

C. Made by beating pure gold at high temperatures

D. Made by a combination of chemical precipitation and atomization
8779. Thickness of luting cement is_____________?
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A. 60-80?

B. 10-20?

C. 20-40?

D. 1-2?

8780. Admixed high copper alloy powder contains_________________?
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A. 9-30% copper

B. 13-20% copper

C. 13-30% copper

D. 9-20% copper
8781. To prevent porosity in dental porcelain it should be backed________________?
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A. Under pressure

B. Boric oxide

C. In vacuum

D. For long period

8782. Green strength with reference to plaster means_____________?
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A. The wet strength

B. Compressive strength

C. Strength of dental stone due to green colour

D. Dry strength

8783. Quartz is Dental porcelain is______________?
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A. Crack minimzer

B. Strengthener

C. Binder

D. Pigment

8784. All of the following statements are true for zinc oxide eugenol cements except______________?
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A. Equal lengths of base paste and accelerator paste are mixed together until the mix has a uniform colour

B. Increase in temperature and humidity shorten the setting time

C. The mix appear thick at the start of mixing but after 30 seconds of additional spatulation it becomes more fluid

D. Water accelerates but heat retards the setting of zinc oxide eugenol cements

E. Both C & D
8785. Which is not true about high copper amalgam alloys______________?
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A. Low creep

B. Low tensile and compressive strength

C. High tensile strength

D. Low Hg: Alloy ratio

8786. Which of the following do polycarboxylate and GIC have in common ?
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A. Polyacrylic acid

B. Polysiloxane

C. Phosphoric acid

D. Ion leachable glass

8787. The most toxic form of mercury is_________________?
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A. Methyl and ethyl mercury

B. Inorganic mercury forms

C. Mercury vapour

D. Mercury sulphide

8789. Opaque porcelain________________?
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A. Not used to mask the colour of the cement used in placing of restoration

B. Is Feldspathic glass

C. Used to produce the characteristic translucence, which is an inherent aspect of the incisal edge in natural teeth

D. Contains opacifier like zirconium and titanium oxide
8790. Most preferable cement for temporary restoration______________?
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A. ZOE

B. Ca (OH)2

C. Zinc polycarboxylate cement

D. GIC

8791. Porcelain denture teeth________________?
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A. Have a higher coefficient of thermal expansion than acrylic teeth:

B. Have a lower abrasion resistance than enamel

C. Have a higher abrasion resistance than gold

D. Should be used where the inter dental clearance is small

8792. Mode of failure during dislodgement of prosthesis cemented with zinc poly carboxylate cement is usually seen at the_____________?
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A. Cement tooth interface

B. Fracture of tooth or prosthesis

C. Cement prosthesis interface

D. Cleavage through the cement layer

8793. Which is not present in porcelain________________?
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A. Amorphous material

B. Calcium carbonate

C. Silica

D. Feldspar

8794. Thermal conductivity of which material is close to dentin____________?
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A. Cavity varnish

B. Amalgam

C. Silicate

D. Composite resin

8795. Which of the following is common to both zinc eugenol cement and polycarboxylate cement?
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A. Chemical bond to tooth structure

B. Polyacrylic acid is liquid

C. Chelation

D. Substitution o eugenol by EBA to increase strength of cement

8796. The ADA specification No 1 for composition of amalgam alloy recommends______________?
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A. None of the above

B. 65% silver, 32% tin and 3% copper

C. 65% silver, 29% tin and 5-6% copper

D. 49% silver, 32% tin and 19% cooper

8797. Which of the following is true about direct filling gold______________?
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A. Whatever may be the type voids are inherent

B. None of the above

C. Properly condensed mat gold has no voids

D. Voids can be avoided with manual condensation

8798. Which phase provides maximum strength in hardened mercury/silver alloy ?
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A. Silver / Tin phase

B. Tin / Mercury phase

C. Silver / Mercury phase

D. Zinc / Mercury phase

8800. Water powder ratio of dental stone and plaster is respectively_________________?
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A. 0.28 and 0.6

B. 0.6 and 3.2

C. 0.28 and 0.98

D. 0.6 and 0.28