medical MCQs – Page 418

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

8341. KHN value of Amalgam is_________________?
0

A. 90

B. 343

C. 450

D. 67

8342. Which of the following will produce the most rigid restoration for framework of same dimension ?
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A. Partial denture casting gold in hardened condition

B. Wrought alloy

C. Cobalt-chrome alloys

D. Palladium alloys

8343. Materials which has high compressive strength and low tensile strength is classified with property of________________?
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A. Brittleness

B. Malleability

C. Ductility

D. Resilient

8344. Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?
0

A. Addition of grain refining agents

B. Increasing the amount of heat required for linear polymerization

C. Incorporation of terminating agents

D. Addition of difunctional monomers

8345. The elastic of plastic deformation to fracture a material is its_______________?
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A. Youngs modulus

B. Proportional limit

C. Brittleness

D. Toughness

8346. Acid-etching is done for_______________?
0

A. 60 seconds

B. 90 seconds

C. 120 seconds

D. 30 seconds

8347. During polymerisation of acrylic resin, above what temperature benzoyl peroxide form freeradicals_______________?
0

A. 50C

B. 60C

C. 25C

D. 37C

8348. Radio opacity to composite resins is rendered by_______________?
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A. Barium glass and strontium glasses

B. Silica glass

C. Organic matrix

D. Fluoride particles

8349. Apart from composites and ceramics, another material that could be copy milled easily and inexpensively is_________________?
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A. Germanium

B. Chromium

C. Molybdenum

D. Titanium

8350. Ability of an orthodontic wire to spring back to its original shape is evaluated by_____________?
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A. Resilience

B. Brittleness

C. Tensile strength

D. Toughness

8351. NiTi alloy have_______________?
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A. Shape memory

B. Hyper rigidity

C. Corrosion resistance

D. Weldable properties

8352. Etching of dentin does not include_____________?
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A. Exposure of collagen fibers

B. Increases surface energy

C. Opening of dentinal tubules

D. Removal of smear layer

8353. Acrylic resins are used for______________?
0

A. Denture base

B. All of the above

C. Anterior restorations

D. Temporary bridges

8354. Co-efficient of thermal expansion is highest for_____________?
0

A. Gold alloy

B. Acrylic resin

C. Silicate cement

D. Amalgam

8355. The restoration which shows percolation and shrinkage along the margins is_____________?
0

A. Composites

B. Unfilled resins

C. Amalgam

D. Polycarboxylate

8356. Space lattice refers to_______________?
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A. Arrangement of atoms

B. Inter atomic movement

C. Arrangement of molecules

D. Inter atomic imbalance

8357. A crystal in metal substructure is_______________?
0

A. None of the above

B. Stroma

C. Grain

D. Nucleus

8358. Denture acrylics contain cross-linking agents mainly to improve their_____________?
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A. Surface hardness

B. Craze resistance

C. Tissue compability

D. Internal color

8359. Ductility of a material is a measure of its_______________?
0

A. Anealing

B. Cold working

C. Work hardening

D. Grain elongation

8360. The most common coupling agents are organic silicon compound called_______________?
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A. Chelane

B. Parabane

C. Silane

D. Ligane

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