8401. Which of the following is correct________________?
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A. Type I and Type II gold can be heat treated and annealed

B. Type I and IV gold can be heat treated and annealed

C. Type III and Type IV gold can be heat treated and annealed

D. All the type of gold can be heat treated and annealed

8402. Macromolecules in Dental Resin is attached by______________?
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A. sonic bonds

B. Vander Walls Forces

C. Covalent bonds

D. Hydrogen Bonds

8405. Which zone is the hottest and efficient burning zone of the flame used for casting ?
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A. Reducing zone

B. Combustion zone

C. Oxidizing zone

D. None of the above

8406. One bottle system of adhesive resins_____________?
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A. Contains only primer

B. 4th generation bonding agents

C. Separate etching step not required

D. Separate etching step is still required
8407. If resin is packed in sandy stage what will be seen in the processed denture ?
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A. Inhomogeneous colour

B. Increased strength

C. Porosity

D. Distortion

8409. Which one of the following is most elastic ?
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A. Nickel-titanium

B. B titanium

C. Chrome-cobalt-nickel

D. a titanium

8410. Investment material used for cobalt-chromium alloys is_____________?
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A. Gypsum bonded

B. Silica bonded

C. Phosphate bonded

D. None of the above

8411. Localised shrinkage porosity is seen when there________________?
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A. No reservoir

B. Inadequate air discharge

C. Investment heated strongly

D. Thin sprue
8413. If resin is packed in sandy stage what will be seen in the processed denture ?
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A. Inhomogeneous colour

B. Distortion

C. Increased strength

D. Porosity
8414. Hydroquinone is added to methyl methacrylate monomer_________________?
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A. All of the above

B. To prevent polymerization during storage

C. To initiate release of free radicalls

D. To enable polymerization reaction at room temperature

8416. For esthetic areas where high luster is required the restoration used usually______________?
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A. Microfilled resin composites

B. Glass ionomer restoratives

C. Hybrid resin composites

D. Macrofilled resin composites

8417. Cleaning of base metal alloy is done by______________?
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A. Cold H2SO4

B. Sand blasting with aluminium oxide

C. Warm HCI

D. Cold HF

8419. In heat cure denture base acrylic resins the monomer is___________?
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A. Methyl ethyl methacrylate

B. Polymethylmethacrylate

C. Methacrylate

D. Ethylmethacrylate

8420. Austenite is an alloy of iron of and carbon with the iron in______________?
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A. Gamma form

B. Beta form

C. Alpha form

D. None of the above

8423. Which of the following is present in the powder of the acrylic resin______________?
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A. D-methyl paratolouidine

B. Methyl methacrylate

C. Benzoyl peroxide

D. Hydroquinone

8424. The polymerization of self-curing resin takes faster in______________?
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A. Cold water

B. Under pressure

C. In vaccum

D. Hot water
8425. The type of spatula used to mix composite is________________?
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A. Plastic

B. Stainless steel

C. None of the above

D. Iron

8428. For photo-curing the composite resin the light source______________?
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A. Is fiber optic

B. Will cure composite upto a depth of 5 millimeter thickness

C. Need no protection while in use

D. Should be held at a millimeter distance from the restoration
8429. A good adhesive should possess all of the following EXCEPT________________?
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A. High flow

B. High adherend wetting

C. Low contact angle

D. High contact angle
8430. The stiffness of a dental gold alloy is determined by its________________?
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A. Flow

B. Proportional limit

C. Ultimate tensile strength

D. Modulus of elasticity
8431. The main advantage of composites over unfilled direct filling resin is their_____________?
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A. Higher solubility in saliva

B. Lower modulus of elasticity

C. Lower thermal co-efficient of expansion

D. Esthetic excellence

8433. Light cure system, side effect is____________?
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A. Cataract

B. Retinal damage

C. Conjunctivitis

D. Iritis

8434. Sub surface porosity can be decreased by_______________?
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A. Increasing the melting temperature

B. Increasing the mould temperature

C. Decreasing the sprue length

D. Decreasing the sprue thickness
8435. The proportional limit is defined as______________?
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A. The maximum stress in a structure

B. The maximum elongation under tension that can be measured before failure

C. The maximum stress that can be induced without permanent deformation

D. The minimum force required to cause a structure to break

8436. Non metal which conducts elactricity______________?
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A. Acrylic

B. Porcelain

C. Graphite

D. Carbon

8437. One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations_____________?
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A. Have a higher coefficient of thermal expansion

B. Are practically insoluble in oral fluids

C. Adapt to the walls of the cavity better

D. Prevent galvanic action

8439. Angles between Adhesive and Adherent is Zero degree, it indicates_______________?
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A. Complete wetting of surfaces

B. Irregularities present between Adherent surfaces

C. Adherent and Adhesive molecules are tangent to each other

D. Rough surfaces between Adhesive & Adherent

8440. Composite resins in comparison to acrylic have_______________?
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A. High abrasive resistance

B. High water absorption

C. High polymerization shrinkage

D. Low compressive strength

8442. The advantage of unfilled methyl methacrylate is that______________?
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A. It has a low degree of flow

B. It can be finished smoothly

C. Its non-irritation to pulp

D. Its wear resistant is high

8445. Which of the following zones is used for melting alloy during casting______________?
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A. Green flame

B. Reducing flame

C. All of the above

D. Oxidizing flame

8446. Pickling________________?
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A. Removes surface oxides from gold castings

B. Is accomplished by soaking the casting in baking soda

C. Remove investment from gold casting

D. Causes porosity in gold

8447. Which of the following constituents is common in occlusal sealants, bonding agents, composite resins ?
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A. BIS GMA

B. Polymethyl methacrylate

C. Benzoin methyl ether

D. Silica filter

8448. Maxwell Voigt Model is to determine________________?
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A. Plastic Behaviour

B. Viscoelastic Behaviour

C. All of the above

D. Elastic Behaviour

8450. Composite has_______________?
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A. None

B. Resin

C. Filler

D. Resin & Filler