1. The term ALARA refers toAs little as Roentgen allowed, an algorithm for limiting patient exposureOptimizing image qualityA legal requirement to optimize occupational exposure in dental radiologyReducing patient exposure to as low as is reasonably achievableQuestion 1 of 20 2. Maximum cupping artifact is seen inMulti size computed tomographyCone beam computed tomographyComputed tomographySpiral beam computed tomographyQuestion 2 of 20 3. in normal dental diagnostic procedures the principal radiation hazard to the operator is produced bysecondary radiationnone of the aboveprimary radiationgamma radiationQuestion 3 of 20 4. Hyperbaric oxygen is beneficial to the patients withSyphilisOsteoradionecrosisTubercular OsteomyelitisActinomycosisQuestion 4 of 20 5. a patient sustains an injury to mandible. Which is the best projection for evaluation of the condylar neck and ramus areaReverse towneSubmentovertexlateral cephWatersQuestion 5 of 20 6. filters are used in x ray beam toreduce exposure timeremove low energy x ray photonsreduce film densitycorrect the x ray beam sizeQuestion 6 of 20 7. Lamina dura, Nasal fossa and maxillary sinus appear distinct and clear in a radiograph due toPhotoelectric effectEgg shell effectWindow effectMach band effectQuestion 7 of 20 8. zygomatic arch fractures are best seen insubmentovertex viewpostero anterior view skulloccipitomental viewlateral view of skullQuestion 8 of 20 9. the most common cause of light radiographs isplacing the shielded side of the film toward the tube during exposureover developing the filmsusing low kilovoltageusing an exhausted developerQuestion 9 of 20 10. Elongation (the most common error) can be caused byThe film is not parallel to the long axisThe occlusal plane is not parallel to the floorAll of the aboveToo little vertical angulationQuestion 10 of 20 11. all of the following increases radiation exposure exceptuse of gridshigh KVPuse of low speed filmslow KVPQuestion 11 of 20 12. The size of the x-ray tube focal spot influences radiographic ____.ContrastMagnificationDensityResolutionQuestion 12 of 20 13. phosphorus-32 emitsbeta particlesalpha particlesx raysneutronsQuestion 13 of 20 14. The disadvantage of digital radiography over conventional radiographyTime consumingProcessing defectsHigher radiation exposureHigh costQuestion 14 of 20 15. which is the best technique for detecting proximal caries in children with minimum radiation exposurebitewing with RVGbitewing with paralleling technique panoramic radiographybitewing with bisecting angle technique Question 15 of 20 16. on the radiograph the mesial site of mandibular 1st molar revealed bone loss of 2-3 mm.on probing 6mm pocket was revealed.the discrepancy could be due toangulation of radiographbone remaining on mesial aspecttaurodontismsuperimposition of bone remaining on facial and lingual surfacesQuestion 16 of 20 17. Which of the following converts electrons into x-rays?negative anodepositive anodenegative cathodepositive cathodeQuestion 17 of 20 18. Which intra-oral radiographs are the most useful in detecting interproximal caries?Bitewing x-raysOcclusal x-raysPeriapical x-raysnone of the aboveQuestion 18 of 20 19. radiographs alone can detect in a pocketshape of bony defectnone of the abovenumber of remaining bony defectextent of bone lossQuestion 19 of 20 20. If exposure is doubled but tube current and voltage remains constant thenProton energy is doubleNumber of protons is doubledMaximum energy is doubleMean energy is doubleQuestion 20 of 20 Loading...
