MCQOPTIONS
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MCQOPTIONS
This section includes 587 Mcqs, each offering curated multiple-choice questions to sharpen your Medical Subjects knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
Hypersensitivity reactions like contact dermatitis can be caused by______________? |
| A. | polysulfides |
| B. | Condensation silicones |
| C. | addition silicones |
| D. | Polyether |
| Answer» E. | |
| 402. |
Hydroquinone is added to methyl methacrylate monomer_________________? |
| A. | To prevent polymerization during storage |
| B. | To initiate release of free radicalls |
| C. | To enable polymerization reaction at room temperature |
| D. | All of the above |
| Answer» B. To initiate release of free radicalls | |
| 403. |
Hydrocolloid material, show all except______________? |
| A. | Hysterisis |
| B. | Imbibition |
| C. | Recrytallisation |
| D. | Syneresis |
| Answer» D. Syneresis | |
| 404. |
How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________? |
| A. | 24 hours |
| B. | 1-2 days |
| C. | 3-5 days |
| D. | 7 days |
| Answer» D. 7 days | |
| 405. |
High strength amalgam is achieved by_____________? |
| A. | Maximum matrix and minimum alloy phase |
| B. | Minimum matrix and maximum alloy phase |
| C. | Maximum matrix phase |
| D. | Minimum alloy phase |
| Answer» C. Maximum matrix phase | |
| 406. |
High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________? |
| A. | Have less marginal breakdown |
| B. | Are workable at lower Hg-alloy ratio |
| C. | Have a higher ratio of tensile to compressive strength |
| D. | Have less resistance to tarnish and corrosion |
| Answer» B. Are workable at lower Hg-alloy ratio | |
| 407. |
High copper amalgam can be produced_____________? |
| A. | From smooth atomized particles |
| B. | From irregular and spherical particles |
| C. | From lathe cut particles |
| D. | From traditional alloy particles |
| Answer» C. From lathe cut particles | |
| 408. |
Heavy and light body impression materials are use with______________? |
| A. | Mercaptan |
| B. | Silicone |
| C. | Reversible hydrocolloid |
| D. | A and B |
| Answer» E. | |
| 409. |
Heat hardening is the process done at_______________? |
| A. | Heating 750°C and slowly cooling to zero degree |
| B. | Heating quickly upto 450°C followed by sudden quenching |
| C. | Heating upto 250°C for 15 to 30 min |
| D. | Heating at 750°C and then quenching to room temperature |
| Answer» D. Heating at 750°C and then quenching to room temperature | |
| 410. |
Hardness number which does not depend on the ductility of metal_____________? |
| A. | KNH |
| B. | VHN |
| C. | RHN |
| D. | BHN |
| Answer» B. VHN | |
| 411. |
Hardening solutions are used with impression made of________________? |
| A. | Hydrocolloid |
| B. | Impression compound |
| C. | Elastomer |
| D. | Zinc oxide eugenol |
| Answer» B. Impression compound | |
| 412. |
Gypsum product having least expansion_____________? |
| A. | Impression plaster |
| B. | Model plaster |
| C. | Stone plaster |
| D. | Die stone |
| Answer» E. | |
| 413. |
Gypsum is used for________________? |
| A. | Impressions |
| B. | Casts |
| C. | Die |
| D. | Casts and Dies |
| Answer» E. | |
| 414. |
Gypsum bonded investment should not be heated over______________? |
| A. | 700°C |
| B. | 1,300°C |
| C. | 1,063°C |
| D. | 900°C |
| Answer» B. 1,300°C | |
| 415. |
Greening occuring when porcelains are fired on silver free alloys may be attributed to________________? |
| A. | Vaporization of silver from the walls of contaminated furnaces |
| B. | Surface diffusion of silver from the marginal metal |
| C. | More rapid silver diffusion in sodium containing glass |
| D. | Silver ionization by porcelains with high oxygen potential |
| Answer» B. Surface diffusion of silver from the marginal metal | |
| 416. |
Green strength with reference to plaster means_____________? |
| A. | Dry strength |
| B. | Compressive strength |
| C. | Strength of dental stone due to green colour |
| D. | The wet strength |
| Answer» E. | |
| 417. |
Gold content of an 18 carat alloy is______________? |
| A. | 25% |
| B. | 50% |
| C. | 75% |
| D. | 100% |
| Answer» D. 100% | |
| 418. |
Glossy smooth margins of a casting are due to_____________? |
| A. | Shrinkage of alloy on cooling |
| B. | Investment breakdown |
| C. | Incomplete wax elimination |
| D. | Incomplete gas elimination |
| Answer» D. Incomplete gas elimination | |
| 419. |
Glass ionomer cements are composed of______________? |
| A. | Alumino silicate powder and phosphoric acid |
| B. | Aluminosillicate powder and polyacrylate |
| C. | Zinc oxide powder and phosphoric acid |
| D. | Zinc oxide powder and polyacrylate liquid |
| Answer» C. Zinc oxide powder and phosphoric acid | |
| 420. |
Gillmore needle is used for_______________? |
| A. | Testing the strength of plaster of paris |
| B. | Evaluating the setting time of plaster of pris |
| C. | Testing the metal hardness |
| D. | Testing the purity of noble metals |
| Answer» C. Testing the metal hardness | |
| 421. |
Gelation temparature of agar is between________________? |
| A. | 20°C to 25°C |
| B. | 27°C to 33°C |
| C. | 37°C to 50°C |
| D. | 55°C to 60°C |
| Answer» D. 55°C to 60°C | |
| 422. |
Gases dissolved in molten metals are liberated when cooled giving rise to________________? |
| A. | Suckback porosity |
| B. | Gas inclusion porosity |
| C. | Localized shrinkage porosity |
| D. | Microporosity |
| Answer» C. Localized shrinkage porosity | |
| 423. |
Gap between true end of casting ring and wax pattern should be______________? |
| A. | ¼ inch |
| B. | ½ inch |
| C. | 3/8 inch |
| D. | one inch |
| Answer» B. ½ inch | |
| 424. |
Gallium and indium added to Amalgam replace______________? |
| A. | Silver |
| B. | Tin |
| C. | Mercury |
| D. | Zinc |
| Answer» D. Zinc | |
| 425. |
Function of wetting agents used in casting procedure is_________________? |
| A. | To felicitate wetting of ring liner |
| B. | To felicitate mixing investment |
| C. | To reduce contact angle of liquid with max surface |
| D. | For better wax elimination |
| Answer» D. For better wax elimination | |
| 426. |
Function of carnauba wax_________________? |
| A. | To provide a smooth and glossy surface |
| B. | Increase toughness |
| C. | Decrease toughness |
| D. | Decrease flow at room temperature |
| Answer» E. | |
| 427. |
Frozen slab technique of mixing zinc phosphate is used for_______________? |
| A. | Cementing crowns |
| B. | Temporary dressing |
| C. | base |
| D. | cementing orthodontic bands |
| Answer» B. Temporary dressing | |
| 428. |
Frozen slab technique is applicable to_____________? |
| A. | Zinc phosphate cement |
| B. | Glass Ionomer cement |
| C. | Zinc oxide Eugenol cement |
| D. | Resin cement |
| Answer» B. Glass Ionomer cement | |
| 429. |
For porcelain fused to metal crown, the porcelain should have ______________? |
| A. | High fusion expansion |
| B. | High fusion temperature |
| C. | Linear coefficient of thermal expansion less than that of metal |
| D. | Linear coefficient of thermal expansion more than that of metal |
| Answer» D. Linear coefficient of thermal expansion more than that of metal | |
| 430. |
For photo-curing the composite resin the light source______________? |
| A. | Should be held at a millimeter distance from the restoration |
| B. | Need no protection while in use |
| C. | Will cure composite upto a depth of 5 millimeter thickness |
| D. | Is fiber optic |
| Answer» B. Need no protection while in use | |
| 431. |
For esthetic areas where high luster is required the restoration used usually______________? |
| A. | Glass ionomer restoratives |
| B. | Hybrid resin composites |
| C. | Microfilled resin composites |
| D. | Macrofilled resin composites |
| Answer» D. Macrofilled resin composites | |
| 432. |
For dental amalgam, the elastic modulus and tensile strength is______________? |
| A. | 40 Gpa and 60 – 100 Mpa |
| B. | 21 Gpa and 27 – 55 Mpa |
| C. | 350 Gpa and 10 – 120 Mpa |
| D. | 360 Gpa and 125 – 130 Mpa |
| Answer» C. 350 Gpa and 10 – 120 Mpa | |
| 433. |
For adhesion to be present between solid and liquid________________? |
| A. | Liquid should wet solid surface |
| B. | Mechanical interlocking should be present |
| C. | Should have high contact angle |
| D. | None of the above |
| Answer» B. Mechanical interlocking should be present | |
| 434. |
Flux used in dental ceramic is________________? |
| A. | Alumina |
| B. | Silica |
| C. | Kaolin |
| D. | Boric oxide |
| Answer» E. | |
| 435. |
Flux is used during casting to________________? |
| A. | Remove the oxides formed on the gold alloy |
| B. | Lower the melting point |
| C. | Replace casting wax |
| D. | Speed the burnout process |
| Answer» B. Lower the melting point | |
| 436. |
Fluoride rich materials include ? |
| A. | Silicate cement |
| B. | Glass ionomer cement |
| C. | Polycarboxylate cement |
| D. | All of the above |
| Answer» E. | |
| 437. |
Flow of a material refers to_______________? |
| A. | Continued change of the material under a given load |
| B. | The consistency of material when mixing |
| C. | The homogencity of gypsum products |
| D. | Dimensional change of the material during settings |
| Answer» B. The consistency of material when mixing | |
| 438. |
Fins and spines on the casting is seen due to_______________? |
| A. | Prolonged heating: |
| B. | Rapid heating me |
| C. | Water film contamination |
| D. | Too high pressure during casting |
| Answer» C. Water film contamination | |
| 439. |
Finer particle size of silica______________? |
| A. | Slower the hygroscopic expansion |
| B. | Greater the hygroscopic expansion |
| C. | Normal setting expansion |
| D. | No setting expansion |
| Answer» C. Normal setting expansion | |
| 440. |
Finishing and polishing of Amalgam make the restoration______________? |
| A. | Increase in tarnish and corrosion resistance |
| B. | Increase the marginal strength |
| C. | Decrease the tarnish and corrosion resistance |
| D. | Increased compressive strength |
| Answer» B. Increase the marginal strength | |
| 441. |
Final product in alginate is________________? |
| A. | Sodium alginate |
| B. | Potassium alginate |
| C. | Trisodium phosphate |
| D. | Calcium alginate |
| Answer» E. | |
| 442. |
Eugenol may be replaced in the zinc oxide eugenol cement by______________? |
| A. | Acetic acid |
| B. | Alginic acid |
| C. | Phosphoric acid |
| D. | Ortho-ethoxy acid |
| Answer» E. | |
| 443. |
Ethoxy benzoic acid increases the strength and solubility of the cement______________? |
| A. | Zinc oxide eugenol |
| B. | Polycarboxylate cement |
| C. | Zinc phosphate cement |
| D. | Silicate cement |
| Answer» B. Polycarboxylate cement | |
| 444. |
Etching of dentin does not include_____________? |
| A. | Removal of smear layer |
| B. | Exposure of collagen fibers |
| C. | Opening of dentinal tubules |
| D. | Increases surface energy |
| Answer» E. | |
| 445. |
Etching depth after 30 sec for orthodontic bracket with orthophosphoric acid is_________________? |
| A. | 10 um – 20 um |
| B. | 3 um – 9 um |
| C. | 50 um – 110 um |
| D. | 200 um – 250 um |
| Answer» B. 3 um – 9 um | |
| 446. |
Etchant preferred in gel from than in liquid form________________? |
| A. | Better control over placement |
| B. | Enhance and concentrate the action of acid |
| C. | Helps in visualization while placement |
| D. | None of the above |
| Answer» B. Enhance and concentrate the action of acid | |
| 447. |
Electrolyte used for plating copper dies is________________? |
| A. | Ionic copper |
| B. | Copper cyanide |
| C. | Silver cyanide |
| D. | Acidic copper sulphate |
| Answer» E. | |
| 448. |
Electralloy is an alloy of________________? |
| A. | Gold and Platinum |
| B. | Cobalt and Chromium |
| C. | Gold and Calcium |
| D. | Tin and chromium |
| Answer» D. Tin and chromium | |
| 449. |
Elastomers except: Polyether are_______________? |
| A. | Hydrophilic |
| B. | Hydrophobic |
| C. | Water loving impression materials |
| D. | Potassium alginates |
| Answer» C. Water loving impression materials | |
| 450. |
Elastomers are_________________? |
| A. | Alginate |
| B. | Agar |
| C. | Polyethers |
| D. | Imp. Compound |
| Answer» D. Imp. Compound | |