8901. Advantage of minimum mercury technique or Eames technique is all Except________________?
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A. Needs no squeezing of excess mercury

B. High strength

C. Sets quickly

D. Greater plasticity and adapts well to cavity walls
8902. For porcelain fused to metal crown, the porcelain should have ______________?
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A. Linear coefficient of thermal expansion less than that of metal

B. High fusion temperature

C. High fusion expansion

D. Linear coefficient of thermal expansion more than that of metal

8904. Chronic mercury toxicity results from_____________?
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A. Mercury vapour

B. Ingestion while removing old amalgam

C. All of the above

D. Skin contact

8905. Eugenol may be replaced in the zinc oxide eugenol cement by______________?
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A. Phosphoric acid

B. Ortho-ethoxy acid

C. Acetic acid

D. Alginic acid

8906. The pure form of gold used in dentistry is known as___________________?
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A. Class I casting gold

B. Class IV casting gold

C. Cohesive gold

D. Non cohesive gold

8908. The dental amalgam is most resistant to________________?
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A. Shear stress

B. Tensile stress

C. Compressive stress

D. Impact stress

8909. Coefficient of thermal expansion of metal-ceramic alloys is________________?
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A. Same as porcelain

B. More than porcelain

C. Less than porcelain

D. More than or equal to porcelain but not less
8910. The effect of trituration on strength in an amalgam restoration depends on______________?
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A. All of the above

B. Amalgam alloy

C. Speed of amalgamator

D. Trituration time

8912. The ideal temperature of water bath for softening fluid wax is about________________?
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A. 51 to 54 degree C

B. 70 to 75 degree F

C. 51 to 54 degree F

D. 70 to 75 degree C

8914. Which is true regarding lathe cut silver alloy_______________?
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A. Requires least amount of mercury

B. Achieves lowest compressive strength at 1 hr.

C. Has tensile strength both at 15 min & 7 days comparable to high copper unicompositional alloy

D. Has low creep

8915. Pyroplastic flow of porcelain is due to___________________?
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A. High temperature during glazing

B. Improper condensation

C. High firing temperature

D. Low temperature during glazing

8916. Secondary caries is least likely seen with_______________?
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A. Polycarboxylate

B. Silicate cement

C. GIC

D. Zinc phosphate

8917. All of the following are true for traditional solution liner, except_________________?
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A. It is not necessary in moderately deep cavities under glass ionomer restoration

B. Do not provide thermal or electric insulation

C. Protect the pulp from reaction products leaching out of restoration

D. Have Film thickness of 1 50 microns
8920. Fluoride rich materials include ?
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A. Silicate cement

B. Polycarboxylate cement

C. Glass ionomer cement

D. All of the above
8921. Electrolyte used for plating copper dies is________________?
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A. Ionic copper

B. Silver cyanide

C. Acidic copper sulphate

D. Copper cyanide

8922. All of the following is used as accelerator in zinc oxide eugenol cement except_______________?
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A. Bromoglycerine

B. Zinc acetate dehydrate

C. Acetic acid

D. Calcium chloride

8924. The cement Which is least soluble in oral cavity______________?
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A. Glass ionomer

B. Silico-Phosphate cement

C. Resin cement

D. Polycarboxylate cement

8925. Setting time of Amalgam is best controlled by _______________?
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A. Altering Hg-Alloy ratio

B. Trituration time

C. Using spherical particles

D. Lathe cut alloy

8926. In non-eugenol pastes the constituents are mixed in______________?
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A. None of the above

B. Ethyl alcohol

C. Phosphoric Acid

D. Benzoic acid
8927. Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?
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A. Its edge strength is greater

B. It has poor tarnish and corrosion resistance

C. It has increased tensile and compressive strength

D. Mercury content in the final restoration is less

8928. Which one of the following is not an objective of trituration ?
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A. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximum

B. Achieve a workable mass of amalgam in minimum time

C. Pulverize pelletes into particles to aid in attack by mercury

D. Remove oxides from powder particle surface

8929. Porcelain is best fired__________________?
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A. Under air compression

B. In open air

C. When several layer are fired simultaneously

D. Under minimum pressure

8930. Crocus cloth is________________?
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A. Rouge

B. Emery

C. Pumice

D. Garnet

8931. The cohesive gold used as bulk filler is_____________?
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A. Spherical gold

B. Electra alloy

C. Gold foll

D. Mat gold
8933. Which of the following acts as accelerator in Zinc oxide eugenol______________?
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A. Zn(OH)2 + ZnO

B. ZnCl2 + ZnSO2

C. Eugenol + ZnO

D. ZnCl2 + Eugenol

8934. Ethoxy benzoic acid increases the strength and solubility of the cement______________?
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A. Silicate cement

B. Zinc phosphate cement

C. Zinc oxide eugenol

D. Polycarboxylate cement

8935. Which cement base has the highest modulus of elasticity ?
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A. Glass inomer cement

B. Zinc polycarboxylate

C. Polymer reinforced ZOE cement

D. Zinc phosphate
8936. Frozen slab technique is applicable to_____________?
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A. Zinc oxide Eugenol cement

B. Glass Ionomer cement

C. Zinc phosphate cement

D. Resin cement

8939. Machineable glass ceramic is________________?
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A. Infusium

B. Decor MGC

C. Cerestore

D. Leucite

8941. Ag-Cu eutectic alloy has a characteristic Property of that fusion temp of_____________?
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A. The resultant alloy is greater

B. The resultant alloy varies according to the content of Ag of Cu

C. None of the above

D. The resultant alloy is lesser
8943. The main purpose of adding metallic oxides in ceramic is________________?
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A. None of the above

B. Transparency

C. Colour matching

D. Opacity

8944. Which of the following show chemical bond with enamel (Calcified tissues)______________?
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A. BIS-GMA resins in pit and fissure sealants

B. Composites

C. Polycarboxylate cements

D. Direct filling resins

8945. Dental porcelains are crystalline materials of________________?
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A. Plastic

B. Rubber

C. Organic substances

D. Glass
8947. Advantage of zinc containing amalgam is_______________?
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A. Resistance to creep

B. Better handling property

C. Toxicity to pulp and dentin

D. Dimensional Stability

8949. What is common in amalgam and ceramics ?
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A. Less compressive strength and tensile strength

B. More compressive strength but less tensile strength

C. Less compressive strength but more tensile strength

D. More compressive strength and tensile strength
8950. Dicor restoration is_______________?
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A. Castabel ceramic

B. None of the above

C. Heat pressed ceramics

D. Two coloured restorations