1. which of the following is most valuable in determining x ray beam qualityhomogeneity cofficienteffective photon energypeak kilovoltage with added filtrationspectral distribution of photon energiesQuestion 1 of 20 2. ossifying fibroma manifest asunilocular opacitymultilocular radiooacityunilocular radiolucencymultilocular radiolucencyQuestion 2 of 20 3. Mandible in single plane is seen inLateral obliqueque AP viewOPGPA viewQuestion 3 of 20 4. in normal dental diagnostic procedures the principal radiation hazard to the operator is produced byprimary radiationnone of the abovegamma radiationsecondary radiationQuestion 4 of 20 5. occlusal radiograph are useful in locatingmaxillary sinus mucocelessialoliths in whartons ductthe mental foramensialoliths in stensons ductQuestion 5 of 20 6. the size of the periapical film used in adults is22 x 35 mm21 x 31 mm31 x 41 mmnone of the aboveQuestion 6 of 20 7. When the X-ray tube is shifted to the right, the object shifts to the left as compred to the adjacent teeth.The object is positionedIn the line with the teethLabial to the teethIt has no relation to the teethLingual to the teethQuestion 7 of 20 8. Advantage of CT SCAN over CBCT isGreater contrast resolutionFan shaped beanAll of the aboveReduced radiation doseQuestion 8 of 20 9. 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 9 of 20 10. Elongation (the most common error) can be caused byAll of the aboveThe occlusal plane is not parallel to the floorThe film is not parallel to the long axisToo little vertical angulationQuestion 10 of 20 11. a developer at high temperature will causeyellow stainsvery dark imageclear white spots on the filmvery light imageQuestion 11 of 20 12. the density of a radiograph is reduced by increasingkilovoltagesource film distancemiliamperageexposure timeQuestion 12 of 20 13. if multiple myelpma is suspected from a patients history and IOPA, which of the following radiographs should be taken to confirm the diagnosislateral oblique viewlateral skullanterior posterior viewposterior anterior viewQuestion 13 of 20 14. 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 radiationMachine AFOV does not matterMachine BBoth will give same resolution of imageQuestion 14 of 20 15. digital radiography differs from conventional inno hard copy is formedradiation receptors are differentx rays not usedrays other than x rays are usedQuestion 15 of 20 16. All are advantages of digital radiography exceptPatient educationThe ability to enhance the imageSize of the intraoral sensorDigital subtractionQuestion 16 of 20 17. sialogram of a normal salivary gland appears assialolithiasisleafy treessialgectasialeafless treesQuestion 17 of 20 18. moth eaten appearance is seen in all exceptOKChemorrhagic bone cystosteosarcomaosteomyelitisQuestion 18 of 20 19. The disadvantage of digital radiography over conventional radiographyProcessing defectsHigh costHigher radiation exposureTime consumingQuestion 19 of 20 20. The function of the filament is toRelease electronsConvert electrons into photonsRelease photonsConvert photons into electronsQuestion 20 of 20 Loading...