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.
| 501. |
Cavo surface angle for amalgam resoration is butt joint as____________? |
| A. | It increases compresssive and tensile strengths |
| B. | Decreased compressive, increased strength |
| C. | Decreased compressive, decrease tensile strength |
| D. | Increased compressive, increased tensile strength |
| Answer» B. Decreased compressive, increased strength | |
| 502. |
Cavity varnishes have_____________? |
| A. | Average bonding to tooth |
| B. | Low bonding to tooth |
| C. | Excellent bonding to tooth |
| D. | No bonding to tooth |
| Answer» E. | |
| 503. |
Cause of expansion in zinc containing amalgam is_____________? |
| A. | Zinc and water |
| B. | Water |
| C. | Hydrogen |
| D. | Nascent oxygen |
| Answer» D. Nascent oxygen | |
| 504. |
Casting shrinkage is compensated by_______________? |
| A. | Thermal expansion |
| B. | Hygroscopic expansion |
| C. | Wax expansion |
| D. | All of the above |
| Answer» E. | |
| 505. |
Casting flux is used to_______________? |
| A. | Prevent the oxidation of the metal during melting |
| B. | increase the melting point of the flux |
| C. | Flaring the point of the sprue attachment |
| D. | None of the above |
| Answer» D. None of the above | |
| 506. |
By product of condensation reaction between silicone base and alkyl silicate in presence of tin octate_______________? |
| A. | Ethyl alcohol |
| B. | Glycol |
| C. | Acetate |
| D. | Propanolol |
| Answer» B. Glycol | |
| 507. |
By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________? |
| A. | Ag |
| B. | Zn |
| C. | Cu |
| D. | Hg |
| Answer» D. Hg | |
| 508. |
Brush heap structure is found in______________? |
| A. | Zinc oxide impression material |
| B. | Agar |
| C. | Condensation silicone |
| D. | Polyether |
| Answer» C. Condensation silicone | |
| 509. |
Brinnel hardness number of a dental gold alloy is directly proportional to its______________? |
| A. | Tensile strength |
| B. | Elongation |
| C. | Modulus of elasticity |
| D. | Modulus of resilience |
| Answer» B. Elongation | |
| 510. |
Brazilian test is used to determine the ultimates tensile strength of_________________? |
| A. | Ductile materials |
| B. | Flexible materials |
| C. | Brittle materials |
| D. | Malleable materials |
| Answer» D. Malleable materials | |
| 511. |
Boxing wax is also called as________________? |
| A. | Carding wax |
| B. | Inlay wax |
| C. | Utility wax |
| D. | Sticky wax |
| Answer» B. Inlay wax | |
| 512. |
Bonding of composite resins to tooth structure is by________________? |
| A. | Covalent bond |
| B. | Ionic bond |
| C. | Mechanical |
| D. | Vanderval forces |
| Answer» D. Vanderval forces | |
| 513. |
Boiling point of methyl methacrylate________________? |
| A. | B.P of water |
| B. | < B.P of water |
| C. | Equal of BP of water |
| D. | Is at normal room temperature |
| Answer» B. < B.P of water | |
| 514. |
Binder used in Gypsum investment is_________________? |
| A. | Silica |
| B. | Quartz |
| C. | Cristobolite |
| D. | Calcium sulphate monohydrate |
| Answer» E. | |
| 515. |
Binder in phosphate bonded investment is______________? |
| A. | Magnesium oxide & Phosphate |
| B. | Magnesium oxide & Phosphoric acid |
| C. | Magnesium oxide & Monoammonium phosphate |
| D. | Magnesium oxide & Ortho Phosphoric acid |
| Answer» D. Magnesium oxide & Ortho Phosphoric acid | |
| 516. |
Beta hemihydrate particles absorb______________? |
| A. | More water |
| B. | Less water |
| C. | no water |
| D. | None of the above |
| Answer» B. Less water | |
| 517. |
Best material for duplicating cast is_______________? |
| A. | Agar-agar |
| B. | Alginate |
| C. | Zinc oxide eugenol |
| D. | Plaster of paris |
| Answer» B. Alginate | |
| 518. |
Best marginal seal is provided by____________? |
| A. | Zinc phosphate |
| B. | Zinc oxide eugenol |
| C. | Gutta-percha |
| D. | Resin |
| Answer» C. Gutta-percha | |
| 519. |
Best impression material to be used for securing impression after crown preparation_______________? |
| A. | Alginate |
| B. | Agar |
| C. | Elastome |
| D. | Zno paste |
| Answer» D. Zno paste | |
| 520. |
Benzoin methyl ether in a polymer indicates that they may be cured in the presence of________________? |
| A. | UV light |
| B. | Visible light |
| C. | Infrared light |
| D. | Diketone |
| Answer» B. Visible light | |
| 521. |
Before pouring an elastic impression it is washed with slurry of water and stone to______________? |
| A. | Increase gel strength |
| B. | Prevent syneresis |
| C. | Prevent distortion |
| D. | Wash off saliva on impression |
| Answer» E. | |
| 522. |
Balanced stone is dental stone_______________? |
| A. | Which undergoes rapid expansion |
| B. | In which accelerators or retarders have been added according to need |
| C. | In which amount of water of hydration is controlled |
| D. | In which the crystals are all of uniform size |
| Answer» C. In which amount of water of hydration is controlled | |
| 523. |
Back pressure porosity can be avoided by________________? |
| A. | Using asbestos linear |
| B. | Placing the sprue at least one quarter inch away form the end of casting ring |
| C. | Preventing rapid heating the investment in burnout oven |
| D. | Using a short and wide sprue |
| Answer» C. Preventing rapid heating the investment in burnout oven | |
| 524. |
Average particle size of powdered gold is________________? |
| A. | 10 um |
| B. | 15 um |
| C. | 30 um |
| D. | 0.1 um |
| Answer» C. 30 um | |
| 525. |
Austenite is an alloy of iron of and carbon with the iron in______________? |
| A. | Alpha form |
| B. | Beta form |
| C. | Gamma form |
| D. | None of the above |
| Answer» D. None of the above | |
| 526. |
Asbestos liner is used in a casting ring to________________? |
| A. | Facilitate venting of the mold |
| B. | Retard the heating of the investment |
| C. | Permit expansion of the world |
| D. | All of the above |
| Answer» D. All of the above | |
| 527. |
As per DNA No. 25, minimum amount of setting expansion required for type V gypsum products_______________? |
| A. | 0.05 |
| B. | 0.10 |
| C. | 0.15 |
| D. | 0.20 |
| Answer» C. 0.15 | |
| 528. |
Apart from composites and ceramics, another material that could be copy milled easily and inexpensively is_________________? |
| A. | Molybdenum |
| B. | Germanium |
| C. | Titanium |
| D. | Chromium |
| Answer» D. Chromium | |
| 529. |
Annealing is also known as_______________? |
| A. | Soft hardening treatment |
| B. | Hard hardening treatment |
| C. | Precipitating heat treatment |
| D. | Stress relieving heat treatment |
| Answer» E. | |
| 530. |
Angles between Adhesive and Adherent is Zero degree, it indicates_______________? |
| A. | Complete wetting of surfaces |
| B. | Rough surfaces between Adhesive & Adherent |
| C. | Adherent and Adhesive molecules are tangent to each other |
| D. | Irregularities present between Adherent surfaces |
| Answer» B. Rough surfaces between Adhesive & Adherent | |
| 531. |
Amalgam restorations give the best clinical service when the residual mercury content is_______________? |
| A. | 38-42% |
| B. | 48-52% |
| C. | 58-62% |
| D. | 68-72% |
| Answer» C. 58-62% | |
| 532. |
Amalgam means_____________? |
| A. | A metallic powder composed of silver, tin, copper and zinc |
| B. | An alloy of two or more metals one of which is mercury |
| C. | An alloy of two or more metals that have been dissolved in each other in the molten state |
| D. | A metallic substances in powder or tablet from that is mixed with mercury |
| Answer» C. An alloy of two or more metals that have been dissolved in each other in the molten state | |
| 533. |
Amalgam achieves 70% of the strength by____________? |
| A. | hours |
| B. | 4 hours |
| C. | 8 hours |
| D. | 16 hours |
| Answer» D. 16 hours | |
| 534. |
Along with polymerisation shrinkage, one of the major disadvantages of polymethyl methacrylate as denture base resin are its poor_____________? |
| A. | Biological properties |
| B. | Thermal properties |
| C. | Mechanical properties |
| D. | Esthetic properties |
| Answer» C. Mechanical properties | |
| 535. |
All of the following statements are true for zinc oxide eugenol cements except______________? |
| A. | Equal lengths of base paste and accelerator paste are mixed together until the mix has a uniform colour |
| B. | Increase in temperature and humidity shorten the setting time |
| C. | The mix appear thick at the start of mixing but after 30 seconds of additional spatulation it becomes more fluid |
| D. | Water accelerates but heat retards the setting of zinc oxide eugenol cements |
| E. | Both C & D |
| Answer» F. | |
| 536. |
All of the following statements about Type II silicon impression material are true EXCEPT_______________? |
| A. | They evolve hydrogen when cast if they are not fully cured |
| B. | They exhibit a very low setting shrinkage |
| C. | They have a lower tear resistance than polysulphide rubbers |
| D. | They set by condensation polymerisation |
| Answer» E. | |
| 537. |
All of the following statements about the differences between self-polymerizing acrylic resins and heat-cured resins are true EXCEPT______________? |
| A. | The former have a lower molecular weight |
| B. | The former have higher residual monomer content |
| C. | The former are more porous |
| D. | The former have greater transverse strength |
| Answer» E. | |
| 538. |
All of the following statements about an alginate impression are EXCEPT________________? |
| A. | It should be rapidly displaced from the mouth |
| B. | It may exhibit fluid exudates on the surface as a result of imbibition of water |
| C. | It will take up water and expand if kept wet |
| D. | It will shrink as a result of syneresis |
| Answer» C. It will take up water and expand if kept wet | |
| 539. |
All of the following statements about cast cobalt alloy are true EXCEPT_____________? |
| A. | They have a modulus of elasticity twice that of gold alloys |
| B. | They are more rigid than gold alloys |
| C. | They have higher ductility than gold alloys |
| D. | They have a lower proportional limit than gold alloys |
| Answer» D. They have a lower proportional limit than gold alloys | |
| 540. |
All of the following is used as accelerator in zinc oxide eugenol cement except_____________? |
| A. | Acetic acid |
| B. | Zinc acetate dehydrate |
| C. | Calcium chloride |
| D. | Bromoglycerine |
| Answer» E. | |
| 541. |
All of the following is used as accelerator in zinc oxide eugenol cement except_______________? |
| A. | Acetic acid |
| B. | Zinc acetate dehydrate |
| C. | Calcium chloride |
| D. | Bromoglycerine |
| Answer» E. | |
| 542. |
All of the following can be used to slow down the setting of Zinc oxide eugenol impression paste EXCEPT_________________? |
| A. | Adding a small amount of glycerine |
| B. | Adding a small amount of water |
| C. | Altering the amounts of the two pastes used |
| D. | Cooling mixing slab |
| Answer» C. Altering the amounts of the two pastes used | |
| 543. |
All of the following are true for traditional solution liner, except_________________? |
| A. | It is not necessary in moderately deep cavities under glass ionomer restoration |
| B. | Have Film thickness of 1 – 50 microns |
| C. | Do not provide thermal or electric insulation |
| D. | Protect the pulp from reaction products leaching out of restoration |
| Answer» C. Do not provide thermal or electric insulation | |
| 544. |
Alginates are_____________? |
| A. | Sol |
| B. | Gel |
| C. | Hydrocolloid |
| D. | Colloid |
| Answer» D. Colloid | |
| 545. |
Alginates are made dust free by adding______________? |
| A. | Glycol |
| B. | Glyecrol |
| C. | Glutamic acid |
| D. | alcohol |
| Answer» C. Glutamic acid | |
| 546. |
Alginate impression material is________________? |
| A. | Non-elastic impression material |
| B. | Thermoplastic impression material |
| C. | More mucostatic than ZOE |
| D. | Less mucostatic than ZOE |
| Answer» E. | |
| 547. |
Alginate impression material is similar to Agar-agar impression material in the following respect________________? |
| A. | Gelation increase in both on increase in temperature |
| B. | Mixing time is increased to reduce the setting time |
| C. | Deformation during removal of impression occurs due to distortion of gel fibers |
| D. | Both can be re-used for fresh impressions |
| Answer» D. Both can be re-used for fresh impressions | |
| 548. |
Air bubbles formed on the surface of casting is probably due to________________? |
| A. | Improper casting pressure |
| B. | Improper heating of the investment |
| C. | Improper angulation of sprue |
| D. | Improper wetting of the wax pattern by the investment |
| Answer» E. | |
| 549. |
Age hardening is a process done at______________? |
| A. | Heating up to 200 – 450°C for 15 – 30 min and quenching in water |
| B. | Heating at 700°C for 10 – 15 min and quenching in water |
| C. | Heating at 700°C for 1 hour and quenching in water |
| D. | Heating above 700°C for 30 min and quenching in water |
| Answer» B. Heating at 700°C for 10 – 15 min and quenching in water | |
| 550. |
Agar syringe material can be used with/as______________? |
| A. | Agar |
| B. | Alginate impression material |
| C. | Both of the above |
| D. | Primary impression |
| Answer» D. Primary impression | |