medical MCQs – Page 421

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 Review each marked answer and report any item that may be outdated or unclear.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

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

8403. A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?
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A. Newtonian

B. Viscoelastic

C. Pseudoplastic

D. Plastic

8404. Coefficienty of thermal expansion of tooth enamel is closest to_______________?
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A. Polycarboxylate

B. Slicate cement

C. GIC

D. Composite

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

8408. The latest method of curing denture base resins______________?
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A. Lasers

B. Heat

C. Chemicals

D. Visible light

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

8412. The contraction of gold alloy on solidifying is approximately_____________?
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A. 0.40%

B. 1.4%

C. 3.40%

D. 2.40%

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

8415. The ability of an alloy to withstand mechanical stresses without permanent deformation is reflected by its______________?
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A. Elastic limit / Elastic strain

B. Hardness

C. Fatigue resistance

D. Resilience

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

8418. The imperfection seen on the lingual flange of a lower denture caused by rapid heating during a curing cycle is called_____________?
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A. Micro porosity

B. Localised Shrinkage porosity

C. Gas inclusion porosity

D. Surface porosity

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

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