1. Which property of x-ray is utilised in intensifying screensBiochemicalChemicalPhysicalBiologicalQuestion 1 of 20 2. The purpose and use of the panaromic image include all of the following except one. Which one is the exceptionTo evaluate impacted teethTo examine extent of large lesionsTo evaluate traumaTo evaluate and diagnose cariesQuestion 2 of 20 3. paralleling technique is used tominimize superimposition of anatomic structureprevent shortening of imageminimize distortionprevent elongation of imageQuestion 3 of 20 4. In taking radiographs, gagging is usually caused whenThe film is moved across the soft palateThe film is held by the patientBite wings are takenThe film impinges on the floor of the mouthQuestion 4 of 20 5. radiographically,in early caries one can mistake a radiolucent line below the DEJ forlines of retziusmach bandstomes granular layerhunter schreger bandsQuestion 5 of 20 6. 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 6 of 20 7. which of the following malignant tumour is radioresistantretinoblastomaewing's sarcomaneuroblastomaosteosarcomaQuestion 7 of 20 8. . A patient with a large squamous cell carcinoma of the lateral border of the tongue is scheduled for a radical neck dissection. Prophylactic extractions of hopeless teeth must be done to prevent which of the following?None of the aboveostepradionecrosisPeriodontal diseaseRampant cariesQuestion 8 of 20 9. Lamina dura, Nasal fossa and maxillary sinus appear distinct and clear in a radiograph due toPhotoelectric effectEgg shell effectMach band effectWindow effectQuestion 9 of 20 10. radiographic diagnosis of dense radioopaque cotton wool areas throughout the entire body of the mandible and associated with hypercementosis is most likelyosteomyelitispaget's diseaseexostosisenostosisQuestion 10 of 20 11. The angle at which the operator should stand from x ray tube for safety45-90 degree135-180 degree150-185 degree90-135 degreeQuestion 11 of 20 12. digital radiography differs from conventional inrays other than x rays are usedno hard copy is formedradiation receptors are differentx rays not usedQuestion 12 of 20 13. the heel effect resultsin low intensity x ray beam on anode side of central rayin high intensity beam of x ray towards cathodeboth of them are truenone of the above are trueQuestion 13 of 20 14. Hyperbaric oxygen is beneficial to the patients withSyphilisTubercular OsteomyelitisActinomycosisOsteoradionecrosisQuestion 14 of 20 15. The function of the filament is toRelease photonsRelease electronsConvert electrons into photonsConvert photons into electronsQuestion 15 of 20 16. Highly radiosensitive cells areLiverBuccal mucosaRetinaLungQuestion 16 of 20 17. It is acceptable for the operator to hold the film in a patient's mouth____.NeverIf the patient is a childIf the patient has a handicapIf the patient or parent grants permissionQuestion 17 of 20 18. which of the following radiographic feature is commonly associated with a traumatic bone cystdome shaped radio oacity of the maxillary sinusdivergence of the roots of teethscalloped radiolucency extending between the roots of teethunilocular radiolucency with focal radiooacityQuestion 18 of 20 19. craniospinal irradiation is useful in which of the following conditionoligodendrogliomapilocyticastrocytomaoncocytomamedulloblastomaQuestion 19 of 20 20. Film size used to evaluate TMJ10*12 inch8*10 inch5*7 inch4*3 inchQuestion 20 of 20 Loading...