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.
| 151. |
The standard perforated tray for us with alginate impression materials may be brought to more customized contour by_______________? |
| A. | Utility wax |
| B. | Base plate wax |
| C. | Beading wax |
| D. | Boxing wax |
| Answer» B. Base plate wax | |
| 152. |
The sprue in wax pattern should be placed________________? |
| A. | At right angle |
| B. | At 45°C angle |
| C. | At obtuse angle |
| D. | It depend upon type of wax pattern |
| Answer» C. At obtuse angle | |
| 153. |
The solvent flux used for base metal soldering is_______________? |
| A. | Boric acid |
| B. | Borax |
| C. | Fluoride |
| D. | Rouge |
| Answer» C. Fluoride | |
| 154. |
The solid solution of silver and mercury is called_______________? |
| A. | y1 |
| B. | y2 |
| C. | B1 |
| D. | y |
| Answer» B. y2 | |
| 155. |
The simplest alloy is a_______________? |
| A. | Solid solution |
| B. | Eutectic alloy |
| C. | Peritectic allowy |
| D. | Ternary alloy |
| Answer» B. Eutectic alloy | |
| 156. |
The setting of zinc phosphate may be retarded by ? |
| A. | Increased in the ratio of powder to liquid |
| B. | Diluting the liquid with water |
| C. | Increase the addition of powder to liquid |
| D. | Decrease the addition of powder to liquid |
| Answer» E. | |
| 157. |
The setting time of ZnPO4 cement can be retarded by_____________? |
| A. | mixing more powder to the liquid |
| B. | mixing powder to liquid, checked by water |
| C. | slower addition of powder to liquid |
| D. | faster addition of powder to liquid |
| Answer» D. faster addition of powder to liquid | |
| 158. |
The setting time of irreversible hydrocolloids can be decreased by_____________? |
| A. | Raising the temperature of water used for maxing |
| B. | Using excess water for maxing |
| C. | Lowering the temperature of water used for mixing |
| D. | None of the above |
| Answer» B. Using excess water for maxing | |
| 159. |
The setting of zinc phosphate is accelerated by_____________? |
| A. | Adding a drop of water |
| B. | Increasing mixing time |
| C. | Cooling the slab |
| D. | Adding a drop of oleic acid |
| Answer» B. Increasing mixing time | |
| 160. |
The setting expansion of gypsum products can be reduced by________________? |
| A. | Increased spatulation |
| B. | Adding potassium sulfate |
| C. | Less water powder ratio |
| D. | Allowing setting under water |
| Answer» C. Less water powder ratio | |
| 161. |
The role of magnesium chloride in zinc oxide eugenol impression paste_________________? |
| A. | Retarder |
| B. | Modifier |
| C. | Plasticier |
| D. | Accelerator |
| Answer» E. | |
| 162. |
The restoration which shows percolation and shrinkage along the margins is_____________? |
| A. | Composites |
| B. | Unfilled resins |
| C. | Amalgam |
| D. | Polycarboxylate |
| Answer» C. Amalgam | |
| 163. |
The relative hardness of elastomere is determined using________________? |
| A. | Rockwell tester |
| B. | Barcol indenter |
| C. | Knoop pyramid |
| D. | Shore durometer |
| Answer» E. | |
| 164. |
The rate of tarnish and corrosion of class II cast material having VHN 200 is_______________? |
| A. | 0% |
| B. | 2 to 3% |
| C. | 5 to 10% |
| D. | <1% |
| Answer» B. 2 to 3% | |
| 165. |
The rapid decrease in tensile strength and increase in ductility of a wrought metal is seen in which stage of annealing ? |
| A. | Recovery stage |
| B. | Recrystallisation stage |
| C. | Grain growth stage |
| D. | All of the above |
| Answer» C. Grain growth stage | |
| 166. |
The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________? |
| A. | Hydrocolloids, silicones, polyether, polysulfide |
| B. | Silicones, hydrocolloids, polyether, polysulfide |
| C. | Polysulfide, hydrocolloids, silicones, polyether |
| D. | Hydrocolloids, polyether, silicones, polysulfide |
| Answer» B. Silicones, hydrocolloids, polyether, polysulfide | |
| 167. |
The purity of gold is expressed in________________? |
| A. | Carats |
| B. | Percentage |
| C. | Fineness |
| D. | Gram |
| Answer» D. Gram | |
| 168. |
The pure form of gold used in dentistry is known as___________________? |
| A. | Cohesive gold |
| B. | Non cohesive gold |
| C. | Class I casting gold |
| D. | Class IV casting gold |
| Answer» B. Non cohesive gold | |
| 169. |
The proportional limit is defined as______________? |
| A. | The maximum stress in a structure |
| B. | The minimum force required to cause a structure to break |
| C. | The maximum stress that can be induced without permanent deformation |
| D. | The maximum elongation under tension that can be measured before failure |
| Answer» D. The maximum elongation under tension that can be measured before failure | |
| 170. |
The product, which is obtained by calcining gypsum under steam pressure at 120-130°C or by dehydrating gypsum in the presence of sodium succinate is_______________? |
| A. | Alpha – hemihydrates |
| B. | Beta – hemihydrates |
| C. | Calcium sulphate dihydrate |
| D. | Orthorhombic anhydrate |
| Answer» B. Beta – hemihydrates | |
| 171. |
The process wherein two or more chemically different monomers, each with some desirable property, can be combined to yield specific physical properties of a polymer is known as_____________? |
| A. | Step-growth polymerization |
| B. | Addition polymerization |
| C. | Condensation polymerization |
| D. | Copolymerization |
| Answer» E. | |
| 172. |
The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________? |
| A. | Boiling |
| B. | Condensation |
| C. | Vulconization |
| D. | Chain lengthening |
| Answer» D. Chain lengthening | |
| 173. |
The principle application of zinc phosphate cement is_____________? |
| A. | In final cementation |
| B. | As temporary cementation |
| C. | As a temporary filling material |
| D. | It has less occlusal wear |
| Answer» B. As temporary cementation | |
| 174. |
The principal constituent of set silicate cement matrix is_______________? |
| A. | Hydrated Aluminium phosphate |
| B. | Hydrated Aluminium Phosphate with calcium fluoride |
| C. | Hydrate Aluminosilicate gel |
| D. | Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel |
| Answer» E. | |
| 175. |
The preferred material for repair of fractured denture base is______________? |
| A. | Chemically cure resin |
| B. | Heat curve resin |
| C. | Light cure resin |
| D. | Vinyl resin |
| Answer» B. Heat curve resin | |
| 176. |
The porosity formed due to simultaneous nucleation of solid grains and gas bubbles at the first moment that metal freezes at the mold walls is called__________? |
| A. | Pinhole porosity |
| B. | Gas inclusion porosity |
| C. | Micro porosity |
| D. | Subsurface porosity |
| Answer» E. | |
| 177. |
The polymerization of self-curing resin takes faster in______________? |
| A. | Cold water |
| B. | Hot water |
| C. | Under pressure |
| D. | In vaccum |
| Answer» C. Under pressure | |
| 178. |
The point at which a stress of a material exhibits a specific limited deviation P is called_______________? |
| A. | Proportional limit |
| B. | Tensile strength |
| C. | Ultimate strength |
| D. | Yield strength |
| Answer» E. | |
| 179. |
The plasticizers used in polyether impression material is_______________? |
| A. | polyether polymer |
| B. | Colloidal silica |
| C. | Glycol ether |
| D. | Di-vinyl poly (dimethyl siloxane) |
| Answer» D. Di-vinyl poly (dimethyl siloxane) | |
| 180. |
The percentage of copper in high copper alloy is______________? |
| A. | 10-12% |
| B. | 0-6% |
| C. | 13-30% |
| D. | 20-30% |
| Answer» D. 20-30% | |
| 181. |
The pattern for the metallic framework of a removable partial denture is fabricated from________________? |
| A. | Inlay wax type-II |
| B. | Boxing wax |
| C. | Modelling wax |
| D. | Casting wax |
| Answer» E. | |
| 182. |
The particle size in microfilled composites is_____________? |
| A. | 0.05 to 0.04mm |
| B. | 0.5 to 1.0 microns |
| C. | 0.01 to 0.1 microns |
| D. | 0.3 to 0.4mm |
| Answer» D. 0.3 to 0.4mm | |
| 183. |
The opacity in ceramics is achieved by adding_______________? |
| A. | Boric oxide |
| B. | Copper oxide |
| C. | Silica |
| D. | Titanium oxide |
| Answer» E. | |
| 184. |
The % of free monomer in a heat – cured acrylic resin is_______________? |
| A. | 3% to 5% |
| B. | 8% to 10% |
| C. | 0.2% to 0.5% |
| D. | 0.6% to 0.8% |
| Answer» D. 0.6% to 0.8% | |
| 185. |
The most toxic form of mercury is_________________? |
| A. | Methyl and ethyl mercury |
| B. | Mercury vapour |
| C. | Inorganic mercury forms |
| D. | Mercury sulphide |
| Answer» B. Mercury vapour | |
| 186. |
The most mucostatic impression material is_______________? |
| A. | Thin mix of plaster of paris |
| B. | Zinc oxide eugenol impression paste |
| C. | Free flowing wax |
| D. | Reversible hydrocolloids |
| Answer» B. Zinc oxide eugenol impression paste | |
| 187. |
The most important disadvantage of acrylic denture base is_______________? |
| A. | porosity |
| B. | Shrinkage |
| C. | Tooth breakage |
| D. | Water absorption |
| Answer» C. Tooth breakage | |
| 188. |
The most commonly used Titanium alloy for dental and medical purposes is________________? |
| A. | Ti 6Al 4V |
| B. | Ti 5Al 4V |
| C. | Ti 5Al 5V |
| D. | Ti 6Al 6V |
| Answer» B. Ti 5Al 4V | |
| 189. |
The most commonly used, most biocompatible and adhesive cement is______________? |
| A. | Zinc phosphate |
| B. | Zinc oxide eugenol |
| C. | Calcium hydroxide |
| D. | Glass ionomer |
| Answer» E. | |
| 190. |
The most commonly used accelerator in gypsum product is___________________? |
| A. | Sodium fluoride |
| B. | Potassium fluoride |
| C. | Potassium sulfate |
| D. | Aluminium sulfate |
| Answer» D. Aluminium sulfate | |
| 191. |
The most common coupling agents are organic silicon compound called_______________? |
| A. | Parabane |
| B. | Ligane |
| C. | Silane |
| D. | Chelane |
| Answer» D. Chelane | |
| 192. |
The modulus of elasticity is defined as_______________? |
| A. | The stress at the proportional limit |
| B. | The strain at the proportional limit |
| C. | The stress/strain ratio within the proportional limit |
| D. | None of the above |
| Answer» D. None of the above | |
| 193. |
The melting point of titanium is __________ degree celsius? |
| A. | 1056 |
| B. | 1560 |
| C. | 1668 |
| D. | 1886 |
| Answer» D. 1886 | |
| 194. |
The melting point of silver is_____________? |
| A. | 1063° centigrade |
| B. | 960° Centigrade |
| C. | 850° Centrigrade |
| D. | 1123° Centrigrade |
| Answer» C. 850° Centrigrade | |
| 195. |
The maximum shrinkage during firing proces in ceramic occurs in__________________? |
| A. | High Bisque stage |
| B. | Low Bisque stage |
| C. | Medium Bisque stage |
| D. | Fusion stage |
| Answer» D. Fusion stage | |
| 196. |
The maximum carbon content of steel used in dentistry is__________________? |
| A. | 19% |
| B. | 2% |
| C. | 1.7% |
| D. | 4% |
| Answer» D. 4% | |
| 197. |
The material used in its pure form in dentistry is______________? |
| A. | Composite |
| B. | Silver |
| C. | Gold |
| D. | Amalgam |
| Answer» D. Amalgam | |
| 198. |
The malleting force is directed______________? |
| A. | Perpendicular to the walls |
| B. | Parallel to long axis of crown |
| C. | 45° to the wall |
| D. | None of the above |
| Answer» D. None of the above | |
| 199. |
The major component of zinc phosphate cement is_____________? |
| A. | Zinc oxide |
| B. | Phosphoric acid |
| C. | Zinc |
| D. | None of the above |
| Answer» B. Phosphoric acid | |
| 200. |
The main purpose of adding metallic oxides in ceramic is________________? |
| A. | Colour matching |
| B. | Transparency |
| C. | Opacity |
| D. | None of the above |
| Answer» B. Transparency | |