medical MCQs – Page 117

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 Review each marked answer and report any item that may be outdated or unclear.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

2321. Chlamydia causes all of the following except________________?
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A. Pneumonia

B. Non-gonococcal urethritis

C. Trachoma

D. Parotitis

2322. Borrelia vincenti is always associated with______________?
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A. None of the above

B. Spirochaetes

C. Treponema vincenti

D. Fusiform bacilli

2323. KHN of enamel is close to______________?
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A. Prcelain

B. Amalgam

C. Pure gold

D. Composite

2324. Leprosy bacilli are transmitted from person to person by all except______________?
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A. From open sore

B. Dischange from nasal mucosa

C. Through breast milk

D. Through intact skin

2325. The ability of the base to resist occlusal forces and to support the restoration is affected by_______________?
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A. Modulus of elasticity

B. Youngs modulus

C. Tensile strength

D. Compressive strength

2326. In processing methyl methacrylate, the resin may show porosity if the flask is placed too soon porosity most likely occur_____________?
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A. On the denture surface

B. Near the borders

C. Throughout the denture

D. In the thickest part

2327. Lancefields classification of B hemolytic streptococcus is based on______________?
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A. Polysaccharide C antigen

B. M Protein

C. Type of lipid in cell membrane

D. Physiological properties

2328. In measuring Vickers hardness no. Which of the following is used________________?
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A. Spherical indenter

B. Steel ball indentation

C. Rhomboid shaped indenter

D. 136-degree diamond pyramid

2329. Composite has_______________?
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A. Resin

B. None

C. Filler

D. Resin & Filler

2330. Mycobacterium tuberculosis is differentiated from other atypical mycobacteria by______________?
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A. None of the above

B. AFB staining

C. Niacin test

D. Pas staining

2331. The main form of iron carbide found in 18-8 steel________________?
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A. Ferrite

B. Martensite

C. Austenite

D. Pearlite

2332. Strain is defined as_____________?
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A. An applied load or force

B. An internal force opposing an applied load

C. An external force opposing an applied load

D. A deformation resulting from an applied load

2333. Stress in defined as_______________?
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A. An applied load or force

B. An internal force opposing an applied load

C. An external force opposing an applied load

D. A deformation resulting from an applied load

2334. Diphtheria is pathogenic only when infected with______________?
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A. Alfa phage

B. Lambda K12

C. Beta phage

D. Delta Phage

2335. The main advantage of composites over unfilled direct filling resin is their_____________?
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A. Lower thermal co-efficient of expansion

B. Lower modulus of elasticity

C. Esthetic excellence

D. Higher solubility in saliva

2336. The causative organism of syphilis is___________?
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A. Leptospira interrogans

B. Chalamydia trachomatis

C. Borrelia burgolorferi

D. Treponema pallidum

2337. The most common pathogens responsible for nosocomial pneumonias in the ICU are______________?
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A. Virus infections

B. Mycoplasma

C. Gram positive organisms

D. Gram negative organisms

2338. Acid-etching is done for_______________?
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A. 90 seconds

B. 120 seconds

C. 60 seconds

D. 30 seconds

2339. Grape bunch shaped colonies are seen in______________?
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A. Streptococcus

B. Gonococci

C. E.coli

D. Staphylococcus

2340. Back pressure porosity can be avoided by________________?
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A. Using asbestos linear

B. Preventing rapid heating the investment in burnout oven

C. Placing the sprue at least one quarter inch away form the end of casting ring

D. Using a short and wide sprue

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