1. Machine A has FOV(field of view) of 6-12 inches,while machine B has FOV of 1.6 to 3.1 inches. Which CBCT machine will produce higher resolution image and deliver less radiationBoth will give same resolution of imageMachine BMachine AFOV does not matterQuestion 1 of 20 2. During radiographic imaging, predominant X-rays are produced by:Bremstrahlung radiationCompton scatteringPhotoelectric effectCoherent scatteringQuestion 2 of 20 3. which of the following malignant tumour is radioresistantosteosarcomaewing's sarcomaneuroblastomaretinoblastomaQuestion 3 of 20 4. If your film-based radiographs start coming out too light, it may be that the ______.Fixer needs changingDeveloper is too hotExposure time is too longDeveloper needs changingQuestion 4 of 20 5. In bitewing method of radiography, for examination of maxillary deciduous lateral incisor, vertical angulation should be60201030Question 5 of 20 6. X ray equipment is cleaned /disinfected withIodoformSodium hypochloriteChlorhexidineBetadineQuestion 6 of 20 7. Which intra-oral radiographs are the most useful in detecting interproximal caries?Occlusal x-raysPeriapical x-raysBitewing x-raysnone of the aboveQuestion 7 of 20 8. The first electron donor in a developer solution isHydroquinoneSodium bicarbonatePotassium bromidePhenidoneQuestion 8 of 20 9. The period between radiation exposure and the onset of symptoms is called thePeriod of cell injuryLatent periodRecovery periodnone of the aboveQuestion 9 of 20 10. at the atomic level x ray photons lose their energy throughspontaneous disintegration and mutation of photon energycompton and photoelectric processescollisions with other photonsbremstrahlung interactionsQuestion 10 of 20 11. radiographic diagnosis of dense radioopaque cotton wool areas throughout the entire body of the mandible and associated with hypercementosis is most likelypaget's diseaseexostosisenostosisosteomyelitisQuestion 11 of 20 12. All of the following cells in the body are relatively resistant to damage by radiation exceptNerve cellsMature boneMucosal cellsMuscle cellsQuestion 12 of 20 13. Radiographically 'se strum' formed in osteomyelitis isLess opaque than healthy boneSame opaque as healthy boneNone of the aboveMore opaque than healthy boneQuestion 13 of 20 14. The size of the x-ray tube focal spot influences radiographic ____.DensityMagnificationContrastResolutionQuestion 14 of 20 15. which one of the following is used to show base of skull,sphenoid sinus,position and orientation of the condyles and fractures of zygomatic archreverse towni projectionthe facial profile surgerysubmentovertex projectionthe TMJ surgeryQuestion 15 of 20 16. On a routine radiographic examination, a well-defined radiolucent lesion was seen in the body of the mandible of a 17-year-old boy. At the time of operation, it proved to be an empty cavity. What is this lesion?Osteoporotic bone marrowAneurysmal bone cystOdontogenic keratocystTraumatic bone cystQuestion 16 of 20 17. a dentist is using a film badge service to measure his radiation exposure.the report from the film badge service indicates that the badge was exposed to 475 millirems in the previous month the dentist shouldreevaluate his radiation hygiene proceduresstop taking radiographs immediatelyincrease target film distanceuse lower speed film to reduce MaSQuestion 17 of 20 18. While taking IOPA radiographs of maxillary 1st molar, to avoid superimposition of the zygomatic arch, the x ray tube should be angulated :Distal with an increase in vertical angulationMesialMesial with decrease in vertical angulationDistalQuestion 18 of 20 19. the density of a radiograph is reduced by increasingexposure timesource film distancemiliamperagekilovoltageQuestion 19 of 20 20. Hyperbaric oxygen is beneficial to the patients withSyphilisTubercular OsteomyelitisOsteoradionecrosisActinomycosisQuestion 20 of 20 Loading...
