medical MCQs – Page 146

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 Review each marked answer and report any item that may be outdated or unclear.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

2901. The cement Which is least soluble in oral cavity______________?
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A. Polycarboxylate cement

B. Resin cement

C. Silico-Phosphate cement

D. Glass ionomer

2902. An enzyme present in saliva which causes cell wall lysis____________?
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A. Lysozhyme

B. Peroxidase

C. Hyaluronidase

D. Lactoferin

2903. Bartholins duct is the name of_______________?
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A. Parotid duct

B. Submandibular glands

C. Sublingual duct

D. Lacrimal duct

2904. Outstanding clinical performance of dental amalgam restoration is related to its____________?
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A. Corrosion

B. Compressive strength

C. Tensile strength

D. Creep

2905. Which of the following is common to both zinc eugenol cement and polycarboxylate cement?
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A. Substitution o eugenol by EBA to increase strength of cement

B. Chelation

C. Polyacrylic acid is liquid

D. Chemical bond to tooth structure

2906. Green strength with reference to plaster means_____________?
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A. Compressive strength

B. Strength of dental stone due to green colour

C. The wet strength

D. Dry strength

2907. Which of the following is not true___________?
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A. The cortical plates are thinner in maxilla than in mandible

B. They are thickest in anterior portion of jaw

C. supporting alveolar bone surrounds the alveolar bone proper and supports the socket

D. Alveolar bone proper surrounds the root and gives attachment to fibres of periodontal ligament

2908. Greening occuring when porcelains are fired on silver free alloys may be attributed to________________?
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A. Silver ionization by porcelains with high oxygen potential

B. Surface diffusion of silver from the marginal metal

C. Vaporization of silver from the walls of contaminated furnaces

D. More rapid silver diffusion in sodium containing glass

2909. PH of polycarboxylate liquid is____________?
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A. 7

B. 1.7

C. 5

D. 8

2910. Plaster of paris is mixed in________________?
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A. Metal bowl

B. Glass bowl

C. Plastic bowl

D. Rubber bowl

2911. Mucin in mucous cells usually demonstrated by______________?
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A. Mallory stain

B. Mucicarmine stain

C. H & E stain

D. PAP stain

2912. Copper content in low copper amalgam is________________?
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A. 29%

B. 19%

C. 6%

D. 12-30%

2913. In amalgam alloy which acts as oxygen scavenger_____________?
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A. Pd

B. Cu

C. Ag

D. Zn

2914. All of the following is used as accelerator in zinc oxide eugenol cement except_____________?
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A. Calcium chloride

B. Zinc acetate dehydrate

C. Acetic acid

D. Bromoglycerine

2915. The cohesive gold used as bulk filler is_____________?
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A. Spherical gold

B. Mat gold

C. Gold foll

D. Electra alloy

2916. In method of firing: A shorter firing period at a higher temperature is considered better_______________?
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A. A short firing period at a very low temperature is preferred

B. A large time period at a lower temperature is preferred

C. none of these

D. A long firing period at a very high temperature is preferred

2917. Thermal conductivity of which material is close to dentin____________?
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A. Silicate

B. Cavity varnish

C. Amalgam

D. Composite resin

2918. About zinc oxide eugenol all are true except_______________?
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A. ZnO is converted to Zn(OH)2

B. Dehydrated ZnO reacts with dehydrated eugenol

C. Water is the byproduct of reaction

D. Reaction is autocatalytic

2919. Torsional force is_______________?
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A. Transverse bending force

B. Shear

C. Tensile force

D. Compression

2920. The threshold limit value of mercury exposures is_______________?
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A. mg / m3

B. mg / m3

C. 0.05 mg / m3

D. mg / m3

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