1. When using a phosphor plate, if we tak eimage without deetion of previous one is calledDouble imageNo imageSingle real imageGhost imageQuestion 1 of 20 2. which of the following radiographic feature is commonly associated with a traumatic bone cystdivergence of the roots of teethscalloped radiolucency extending between the roots of teethunilocular radiolucency with focal radiooacitydome shaped radio oacity of the maxillary sinusQuestion 2 of 20 3. Lead apron protectsHandsGonadsThyroidEyesQuestion 3 of 20 4. Lamina dura, Nasal fossa and maxillary sinus appear distinct and clear in a radiograph due toEgg shell effectMach band effectPhotoelectric effectWindow effectQuestion 4 of 20 5. 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 tobone remaining on mesial aspectangulation of radiographtaurodontismsuperimposition of bone remaining on facial and lingual surfacesQuestion 5 of 20 6. the heel effect resultsin high intensity beam of x ray towards cathodein low intensity x ray beam on anode side of central raynone of the above are trueboth of them are trueQuestion 6 of 20 7. Deterministic effects ____.Show a severity of response proportional to doseAre seen only in the oral cavityAre found after exposure to low levels of radiationResult from particulate radiation such as alpha and beta particles but not xraysQuestion 7 of 20 8. at the atomic level x ray photons lose their energy throughspontaneous disintegration and mutation of photon energybremstrahlung interactionscollisions with other photonscompton and photoelectric processesQuestion 8 of 20 9. zygomatic arch fractures are best seen inlateral view of skulloccipitomental viewsubmentovertex viewpostero anterior view skullQuestion 9 of 20 10. the speed with which electrons travel from the filament of the cathode to the target of the anode depends upon thenumber of milliamperes in the tube circuitvoltage in the filament circuitangle between the filament and the targetpotential difference between the two electrodesQuestion 10 of 20 11. a patient with a history of radiation therapy requires special consideration becausethe potential for periodontal disease is greatly increasedpla accumulation greater than normal can be expectedthe vascularity of bone may be disruptedsalivary function may be increasedQuestion 11 of 20 12. In case of suspected metastasis to lymph nodes of neck,ultrasound will reveal all of the following exceptLoss of fatty hyaline layerHypoechoic shadowDecreased vascularityPresence of microcalcificationsQuestion 12 of 20 13. Beaten metal appearance of skull from insideCrouzon syndromeApert syndromeMultiple myelomaRicketsQuestion 13 of 20 14. which is the best technique for detecting proximal caries in children with minimum radiation exposurebitewing with bisecting angle technique panoramic radiographybitewing with paralleling technique bitewing with RVGQuestion 14 of 20 15. which of the following is not done as an investigation in osteosarcoma MRI femurbone scanbone marrow biopsyx ray chestQuestion 15 of 20 16. The radiolucent portions of the images on a processed dental x-ray film are made up of ____.Unexposed silver bromideMicroscopic grains of metallic silverMicroscopic grains of silver halideA gelatin on a cellulose acetate baseQuestion 16 of 20 17. X ray equipment is cleaned /disinfected withChlorhexidineBetadineSodium hypochloriteIodoformQuestion 17 of 20 18. If exposure is doubled but tube current and voltage remains constant thenNumber of protons is doubledMean energy is doubleMaximum energy is doubleProton energy is doubleQuestion 18 of 20 19. It is generally desirable that x-ray films be all of the following exceptCoated with emulsion on both sidesHigh speedFine grain sizeSensitive to visible lightQuestion 19 of 20 20. radiographically level of normal alveolar crest is related toDEJgingival marginCEJnoneQuestion 20 of 20 Loading...
