medical MCQs – Page 137

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 Review each marked answer and report any item that may be outdated or unclear.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

2721. Agar impression materials differ from alginate impression materials in that the former sets by_______________?
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A. Chemical change

B. Mechanical action of saliva

C. Physical change

D. Evolution

2722. Beta hemihydrate particles absorb______________?
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A. More water

B. Less water

C. no water

D. None of the above

2723. Gillmore needle is used for_______________?
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A. Evaluating the setting time of plaster of pris

B. Testing the strength of plaster of paris

C. Testing the purity of noble metals

D. Testing the metal hardness

2724. Within an hour after cementation of cast gold onlay patient complains of shooting pain every time the teeth comes together Most probable explanation is ______________?
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A. Galvanic current caused by gold onlay occluding with a large restoration

B. Supracocclusion of restoration

C. Retained cement in gingival sulcus

D. Excess acid in mix

2725. The standard perforated tray for us with alginate impression materials may be brought to more customized contour by_______________?
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A. Boxing wax

B. Utility wax

C. Base plate wax

D. Beading wax

2726. Agar syringe material can be used with/as______________?
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A. Agar

B. Alginate impression material

C. Both of the above

D. Primary impression

2727. Softening heat treatment of alloy increases_________________?
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A. Ductility

B. Tensile strength

C. Proportional limit

D. Hardness

2728. The main ingredient of inlay wax is__________________?
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A. Gum dammar

B. Paraffin wax

C. Carnauba wax

D. Candellila wax

2729. In a patient with allergy to costume jewelry, which of the following is contraindicated______________?
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A. Ni Cr

B. Palladium Ag

C. High gold

D. Low gold

2730. Balanced stone is dental stone_______________?
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A. Which undergoes rapid expansion

B. In which the crystals are all of uniform size

C. In which amount of water of hydration is controlled

D. In which accelerators or retarders have been added according to need

2731. The linear solidification shrinkage of Type IV Ni-Cr based alloys is_______________?
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A. 2.3%

B. 3%

C. 1.37%

D. 1.56%

2732. Which of the waxes are derived from the lignite_________________?
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A. Inlay wax

B. Montan wax

C. Microcrystalline wax

D. Paraffin wax

2733. Impression plaster is_____________?
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A. As compressive as alginate

B. Less compressive than alginate

C. More compressive than alginate

D. More compressive than hydrocolloids

2734. The effects associated with cold working can be eliminated by a heat treatment called______________?
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A. Homogenization heat treatment

B. Annealing heat treatment

C. Age hardening heat treatment

D. Solution heat treatment

2735. Gypsum bonded investment should not be heated over______________?
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A. 700C

B. 1,300C

C. 1,063C

D. 900C

2736. Quartz is added to gypsum bonded investment to______________?
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A. Counter balance contraction of gypsum during heating

B. Increase the strength

C. Increase the shelf life of investment

D. aid in hygroscopic expansion

2737. The plasticizers used in polyether impression material is_______________?
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A. polyether polymer

B. Di-vinyl poly (dimethyl siloxane)

C. Glycol ether

D. Colloidal silica

2738. Mechanical properties of Cp Titanium are similar to alloys_____________?
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A. Type VII and type VIII gold

B. None of the above

C. Type III and Type IV gold

D. Type V and type VI gold

2739. Which of the following refractory is used to counteract most of the expansion________________?
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A. Corundum

B. Tridymite

C. Cristobalite

D. Quartz

2740. Indium in metal alloys_______________?
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A. Improve bonding

B. Harden the metal ceramic Ag-Pd alloy

C. Both A and B

D. None of the above

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