medical MCQs – Page 149

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 Review each marked answer and report any item that may be outdated or unclear.

2961. Mercury is toxic because it_____________?
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A. Inhibits hemoglobin synthesis, producing anemia

B. Binds to sulfhydryl groups

C. Complexes with hemoglobinto form methemoglobin

D. Inhibits anaerobic glycolysis

2962. Admixed high copper alloy powder contains_________________?
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A. 9-30% copper

B. 13-20% copper

C. 13-30% copper

D. 9-20% copper
2963. The addition of which of the following can accelerate the setting time of zinc oxide cement_____________?
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A. Zinc acetate

B. Zinc sulphate

C. Barium chloride

D. Barium sulphate

2964. When selection the colour of cement to use for cementing a porcelain jacket crown, the powder being tested is best mixed with______________?
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A. Only water

B. Cement liquid

C. Glycerin-water solution

D. Alcohol

2965. The principal constituent of set silicate cement matrix is_______________?
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A. Hydrated Aluminium phosphate

B. Hydrate Aluminosilicate gel

C. Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel

D. Hydrated Aluminium Phosphate with calcium fluoride

2966. The most toxic form of mercury is_________________?
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A. Mercury vapour

B. Mercury sulphide

C. Methyl and ethyl mercury

D. Inorganic mercury forms

2967. Frozen slab technique of mixing zinc phosphate is used for_______________?
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A. Temporary dressing

B. base

C. Cementing crowns

D. cementing orthodontic bands

2968. Porcelain binds to metal in PFM crown by_________________?
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A. Metallic bind

B. Chemical bond

C. Transparency

D. B and C
2969. PH of which cement remain below 7 even after 1 month after insertion into the cavity ?
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A. Zinc Phosphate

B. Resin cement

C. Glass Ionomer Cement

D. Silicate cement
2970. Chemical method of strengthening porcelain involves_________________?
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A. Exchange of aluminium and sodium ions

B. Exchange of sodium and potassium ions

C. Exchange of aluminium and potassium ions

D. None of the above

2971. The effect of trituration on strength in an amalgam restoration depends on______________?
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A. Trituration time

B. Speed of amalgamator

C. Amalgam alloy

D. All of the above
2972. Frozen slab technique is applicable to_____________?
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A. Zinc oxide Eugenol cement

B. Resin cement

C. Glass Ionomer cement

D. Zinc phosphate cement
2973. Total volume of saliva secreted by submandibular gland daily is______________?
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A. 450 ml

B. 750 ml

C. 1500 ml

D. 1000 ml

2974. Advantage of zinc containing amalgam is_______________?
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A. Toxicity to pulp and dentin

B. Dimensional Stability

C. Better handling property

D. Resistance to creep

2975. The most commonly used, most biocompatible and adhesive cement is______________?
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A. Glass ionomer

B. Zinc oxide eugenol

C. Calcium hydroxide

D. Zinc phosphate

2976. Minimum thickness for type I zinc phosphate cement should be_______________?
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A. 50 microns

B. 25 microns

C. 15 microns

D. 100 microns

2977. Adequate mixing of mercury is indicated by_______________?
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A. None of the above

B. Short Mixing Time

C. Shiny Mix

D. Dry Mix

2978. Silicate cement is indicated in________________?
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A. Mouth breathers

B. In the restoration of posterior tooth

C. Patients with high caries index

D. None of the above

2979. Machineable glass ceramic is________________?
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A. Decor MGC

B. Cerestore

C. Infusium

D. Leucite

2980. Which of the following is correct?
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A. Cementicles are found in periodontal ligament of order individuals

B. The small nerve fibres may or may not be myelinated and are concerned with discrement of pain

C. All of the above

D. Fibronectin helps in attachment of fibroblasts to collagen

E. The large nerve fibres are myelinated and are concerned with discerment of touch