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.
| 451. |
Dynamic creep is the______________? |
| A. | Continuing alloying between silver-tin alloy and mercury during the life of restoration |
| B. | Deformation of set amalgam during function |
| C. | Process whereby alloy is wetted by murcury |
| D. | Spread of amalgam during packing |
| Answer» C. Process whereby alloy is wetted by murcury | |
| 452. |
Dustless alginate is produced by______________? |
| A. | Reducing the diatomaceous earth |
| B. | Adding heavy metal salts |
| C. | Coating with dihydric alcohol |
| D. | Altering the matrix |
| Answer» D. Altering the matrix | |
| 453. |
During soldering, the solidus temperature of the filler material should be_____________? |
| A. | Greater than the substrate material |
| B. | Lesser than the substrate material |
| C. | Equal to the substrate material |
| D. | Temperature not relevant |
| Answer» C. Equal to the substrate material | |
| 454. |
During setting of alginate impression materials________________? |
| A. | Trisodium phosphate reacts with sodium alginate |
| B. | Trisodium phosphate reacts with calcium sulphate |
| C. | Colloidal changes to sol |
| D. | Material in contact with soft tissues sets last |
| Answer» C. Colloidal changes to sol | |
| 455. |
During polymerisation of acrylic resin, above what temperature benzoyl peroxide form freeradicals_______________? |
| A. | 25°C |
| B. | 37°C |
| C. | 50°C |
| D. | 60°C |
| Answer» E. | |
| 456. |
During amalgamation, trituration is done to_____________? |
| A. | Dissolve the alloy in mercury |
| B. | Coat the alloy particle with mercury |
| C. | Remove excess mercury from the amalgam |
| D. | Dissolve Hg in alloy |
| Answer» C. Remove excess mercury from the amalgam | |
| 457. |
Ductility of a material is a measure of it’s_______________? |
| A. | Grain elongation |
| B. | Anealing |
| C. | Cold working |
| D. | Work hardening |
| Answer» B. Anealing | |
| 458. |
Dispersion of crystalline phase to strengthen ceramics results in_________________? |
| A. | dispersed porcelain |
| B. | Glazed porcelain |
| C. | aluminium porcelain |
| D. | All of the above |
| Answer» D. All of the above | |
| 459. |
Discolouration of silver alloy is due to_____________? |
| A. | Tarnish |
| B. | Tarnish and corrosion |
| C. | Wet corrosion |
| D. | Dry corrosion |
| Answer» C. Wet corrosion | |
| 460. |
Disadvantage of having a short sprue is________________? |
| A. | Rapid solidification of metal |
| B. | No place for reservoirs |
| C. | Incomplete evacuation of gases |
| D. | Difficulty in removing casting from investment |
| Answer» D. Difficulty in removing casting from investment | |
| 461. |
Direct filling gold formed by electrolytic precipitation is called by all the terms EXCEPT______________? |
| A. | Crystalline |
| B. | Granular gold |
| C. | Mat gold |
| D. | Sponge gold |
| Answer» C. Mat gold | |
| 462. |
Dimensional stability of hydrocolloid impressions may be achieved by_________________? |
| A. | Using less water powder ratio |
| B. | Storing the impression under water |
| C. | Prolonged manipulation |
| D. | Using humidor |
| Answer» E. | |
| 463. |
Dimensional stability of elastomeric impression material can be given in descending order as_____________? |
| A. | Polysulphide > polyether > Condensation silicone > Addition silicone |
| B. | polyether > Condensation silicone > Polysulphide > Addition silicone |
| C. | Addition silicone > polyether > Polysulphide > Condensation silicone |
| D. | Addition silicone> Condensation silicone > Polysulphide > polyether |
| Answer» D. Addition silicone> Condensation silicone > Polysulphide > polyether | |
| 464. |
Die is________________? |
| A. | Impression of single tooth |
| B. | Impression of whole teeth |
| C. | Replica of single tooth |
| D. | Replica of whole teeth |
| Answer» D. Replica of whole teeth | |
| 465. |
Dicor restoration is_______________? |
| A. | Two coloured restorations |
| B. | Heat pressed ceramics |
| C. | Castabel ceramic |
| D. | None of the above |
| Answer» D. None of the above | |
| 466. |
Denture acrylics contain cross-linking agents mainly to improve their_____________? |
| A. | Internal color |
| B. | Tissue compability |
| C. | Surface hardness |
| D. | Craze resistance |
| Answer» E. | |
| 467. |
Dental porcelains are crystalline materials of________________? |
| A. | Rubber |
| B. | Plastic |
| C. | Organic substances |
| D. | Glass |
| Answer» E. | |
| 468. |
Dentin conditioner has the following function______________? |
| A. | Removes smear layer |
| B. | Increases surface energy of dentin |
| C. | Forms a thin resin layer over exposed collagen fibrils |
| D. | Helps in bonding with composite |
| Answer» B. Increases surface energy of dentin | |
| 469. |
Dentin bonding agents usually contain_____________? |
| A. | Only Hydrophobic component |
| B. | Only Hydrophilic component |
| C. | Hydrophobic and hydrophilic component |
| D. | Lyophillic and lyophobic component |
| Answer» D. Lyophillic and lyophobic component | |
| 470. |
Dendrites in cst alloys form by mechanism of_________________? |
| A. | Constitutional superconductivity |
| B. | Constitutional supercooling |
| C. | Constitutional supergriting |
| D. | Constitutional supergraining |
| Answer» C. Constitutional supergriting | |
| 471. |
Deformation that is recovered upon removal of an externally applied force or pressure is known as_____________? |
| A. | Young’s modulus |
| B. | Plastic strain |
| C. | Elastic strain |
| D. | Flexural strain |
| Answer» D. Flexural strain | |
| 472. |
Decrease in creep occurs in_______________? |
| A. | Under trituration or over trituration of amalgam |
| B. | Decreases with condensation pressure |
| C. | Increase with condensation pressure |
| D. | Cannot be predictable |
| Answer» D. Cannot be predictable | |
| 473. |
Crucible indicated for casting base metal alloys is______________? |
| A. | Carbon crucible |
| B. | Clay crucible |
| C. | Quartz crucible |
| D. | High melting plastic crucible |
| Answer» D. High melting plastic crucible | |
| 474. |
Cross linking in denture base resin is contributed by_____________? |
| A. | Glycol dimetharylate |
| B. | Benzoyl peroxide |
| C. | N-para toluidine |
| D. | Methyl methacrylate |
| Answer» B. Benzoyl peroxide | |
| 475. |
Crocus cloth is________________? |
| A. | Emery |
| B. | Garnet |
| C. | Pumice |
| D. | Rouge |
| Answer» E. | |
| 476. |
Creep value of which of the following is the highest ? |
| A. | Low copper amalgam alloy |
| B. | Admix alloy |
| C. | Single composition alloys |
| D. | Creep value of all the above mentioned alloys is same |
| Answer» B. Admix alloy | |
| 477. |
Corrosion of stainless steel is due to formulation of_________________? |
| A. | Chromium carbide |
| B. | Carbon carbide |
| C. | Iron carbide |
| D. | Nickel carbide |
| Answer» B. Carbon carbide | |
| 478. |
Copper content in low copper amalgam is________________? |
| A. | 6% |
| B. | 12-30% |
| C. | 29% |
| D. | 19% |
| Answer» B. 12-30% | |
| 479. |
Condensation shrinkage of porcelain during firing depends on__________________? |
| A. | Rate of arriving at firing temperature |
| B. | Uniformity of particle size |
| C. | Shape and size of particle |
| D. | Type of investment used |
| Answer» D. Type of investment used | |
| 480. |
Compressive stress is computed by dividing the external force by the_______________? |
| A. | Area of the test specimen upon which the weight rests |
| B. | Elasticity of the test specimen in strain |
| C. | Length of the test specimen beneath the force |
| D. | Strain of the test specimen per unit length |
| Answer» B. Elasticity of the test specimen in strain | |
| 481. |
Composite resins in comparison to acrylic have_______________? |
| A. | Low compressive strength |
| B. | High abrasive resistance |
| C. | High water absorption |
| D. | High polymerization shrinkage |
| Answer» C. High water absorption | |
| 482. |
Composite has_______________? |
| A. | Resin |
| B. | Filler |
| C. | Resin & Filler |
| D. | None |
| Answer» D. None | |
| 483. |
Component of inlay wax which makes it flake resistant is_____________? |
| A. | Paraffin |
| B. | Carnauba |
| C. | Gum dammar |
| D. | Canadelila |
| Answer» D. Canadelila | |
| 484. |
Compared with noble metals, base metals show_______________? |
| A. | Increased hardness |
| B. | Increased ductility |
| C. | Better biocompatibility |
| D. | Increased density |
| Answer» B. Increased ductility | |
| 485. |
Compared with dental alloys, CERAMICS show____________________? |
| A. | High ductility |
| B. | High hardness |
| C. | Low esthetic value |
| D. | Susceptibility to brittle fracture |
| Answer» E. | |
| 486. |
Compare to conventional amalgams, spherical amalgams_______________? |
| A. | Require more mercury |
| B. | Require heavy compection forces |
| C. | Have longer setting times |
| D. | None of the above |
| Answer» E. | |
| 487. |
Cold cure acrylic expand in water by___________? |
| A. | 1% by volume 0.23% by weight |
| B. | 10% by volume 0.23% by weight |
| C. | 0.1% by volume 0.23% by weight |
| D. | None of the above |
| Answer» B. 10% by volume 0.23% by weight | |
| 488. |
Cohesion of gold foil is an example of______________? |
| A. | Atomic attraction and welding |
| B. | Annealing |
| C. | Wedging |
| D. | Adaptation |
| Answer» B. Annealing | |
| 489. |
Coefficienty of thermal expansion of tooth enamel is closest to_______________? |
| A. | Slicate cement |
| B. | Composite |
| C. | GIC |
| D. | Polycarboxylate |
| Answer» D. Polycarboxylate | |
| 490. |
Coefficient of thermal expansion of which of following is most similar to that of tooth ? |
| A. | Gold inlay |
| B. | Acrylic resin |
| C. | Silicate cement |
| D. | Gold foil |
| Answer» D. Gold foil | |
| 491. |
Coefficient of thermal expansion of metal-ceramic alloys is________________? |
| A. | Same as porcelain |
| B. | More than porcelain |
| C. | Less than porcelain |
| D. | More than or equal to porcelain but not less |
| Answer» E. | |
| 492. |
Cobalt-Chrominum alloys contains_______________? |
| A. | 30% cobalt and 60% chrominum |
| B. | 60% cobalt and 30% chrominum |
| C. | 1% palladium |
| D. | 20% gold |
| Answer» C. 1% palladium | |
| 493. |
Co-efficient of thermal expansion is highest for_____________? |
| A. | Amalgam |
| B. | Silicate cement |
| C. | Gold alloy |
| D. | Acrylic resin |
| Answer» E. | |
| 494. |
Co-efficient of Thermal exansion of amalgam is______________? |
| A. | 6.6 a (ppm k-1) |
| B. | 11.4 a (ppm k-1) |
| C. | 14.0 a (ppm k-1) |
| D. | 25.0 a (ppm k-1) |
| Answer» E. | |
| 495. |
Clogging of an abrasive wheel with debris causing reduction of abrasive action is called________________? |
| A. | Blinding |
| B. | Buffing |
| C. | Dressing |
| D. | Truing |
| Answer» B. Buffing | |
| 496. |
Cleaning of base metal alloy is done by______________? |
| A. | Warm HCI |
| B. | Cold HF |
| C. | Cold H2SO4 |
| D. | Sand blasting with aluminium oxide |
| Answer» E. | |
| 497. |
Chronic mercury toxicity results from_____________? |
| A. | Ingestion while removing old amalgam |
| B. | Skin contact |
| C. | Mercury vapour |
| D. | All of the above |
| Answer» E. | |
| 498. |
Chemical tempering in porcelains is done to interrupt crack propagation by______________? |
| A. | Transformation toughening |
| B. | Dispersion of crystalline phase |
| C. | Inducing residual compressive strength |
| D. | All of the above |
| Answer» D. All of the above | |
| 499. |
Chemical method of strengthening porcelain involves_________________? |
| A. | Exchange of aluminium and sodium ions |
| B. | Exchange of aluminium and potassium ions |
| C. | Exchange of sodium and potassium ions |
| D. | None of the above |
| Answer» D. None of the above | |
| 500. |
Ceramics fired to metals are processed by_______________? |
| A. | Heat pressing |
| B. | Machining |
| C. | Sintering |
| D. | Slip casting |
| Answer» D. Slip casting | |