medical MCQs – Page 145

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 Review each marked answer and report any item that may be outdated or unclear.

2881. Ag-Cu eutectic alloy has a characteristic Property of that fusion temp of_____________?
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A. None of the above

B. The resultant alloy is greater

C. The resultant alloy is lesser

D. The resultant alloy varies according to the content of Ag of Cu

2882. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?
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A. Have less resistance to tarnish and corrosion

B. Have a higher ratio of tensile to compressive strength

C. Are workable at lower Hg-alloy ratio

D. Have less marginal breakdown
2883. Which is true regarding lathe cut silver alloy_______________?
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A. Requires least amount of mercury

B. Achieves lowest compressive strength at 1 hr.

C. Has tensile strength both at 15 min & 7 days comparable to high copper unicompositional alloy

D. Has low creep

2884. Chronic mercury toxicity results from_____________?
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A. Mercury vapour

B. Ingestion while removing old amalgam

C. All of the above

D. Skin contact

2885. Which one of the following dental cement accelerates the formation of reparative dentin ?
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A. Eugenol

B. Silica

C. Zinc oxide

D. Calcium Hydroxide
2886. What is common in amalgam and ceramics ?
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A. More compressive strength and tensile strength

B. Less compressive strength and tensile strength

C. Less compressive strength but more tensile strength

D. More compressive strength but less tensile strength

2887. Which of the following does not occur in High Copper Amalgam ?
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A. Penetrating Corrosion

B. Corrosion does not occur at all

C. Chemical Corrosion

D. Electrochemical Corrosion

2888. What is the recommended for condensation of dental amalgam ?
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A. 25 lb

B. 15 lb

C. 35 pounds

D. 3 pounds
2889. Porosity in porcelain can be prevented by_______________?
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A. Rapidity of firing

B. High firing temperature

C. Thoroughness of condensation

D. All of the above

2890. Vonebners gland are_______________?
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A. Posterior lingual mucous glands

B. Glosso palatine glands

C. glands at apex of tongue

D. Posterior lingual serous glands
2891. Once triturated, the Dental amalgam should be condensed with in_____________?
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A. 5 minutes

B. 15 minutes

C. 3 minutes

D. 6 minutes

2892. Water of reaction needed to react completely with 100 g of calcium sulphate hemihydrates to convert it to calcium sulphate dihydrate______________?
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A. 18.6ml

B. 22.2ml

C. 45.3ml

D. 30.4ml

2893. Ceramics fired to metals are processed by_______________?
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A. Heat pressing

B. Machining

C. Sintering

D. Slip casting

2894. Pitting of direct filling old restoration usually results from_________________?
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A. Using small condenser point

B. Improper stepping of condenser point

C. Poor finished preparation

D. Using contaminated gold foil

2895. Which of the following cements is most kind to pulp ?
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A. Polycarboxylate

B. Resin cement

C. Glass ionomer

D. Silicate

2896. Coefficient of thermal expansion of metal-ceramic alloys is________________?
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A. More than porcelain

B. More than or equal to porcelain but not less

C. Less than porcelain

D. Same as porcelain

2897. In non-eugenol pastes the constituents are mixed in______________?
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A. Benzoic acid

B. Phosphoric Acid

C. None of the above

D. Ethyl alcohol

2898. The average life of silicate cement restoration is______________?
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A. 4 years

B. 6 years

C. 8 years

D. 2 years

2899. Clogging of an abrasive wheel with debris causing reduction of abrasive action is called________________?
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A. Dressing

B. Truing

C. Buffing

D. Blinding
2900. The principle application of zinc phosphate cement is_____________?
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A. In final cementation

B. As temporary cementation

C. It has less occlusal wear

D. As a temporary filling material