1. the heel effect resultsin high intensity beam of x ray towards cathodeboth of them are truenone of the above are truein low intensity x ray beam on anode side of central rayQuestion 1 of 20 2. If an exposed radiograph is too dark after proper development, you should ____.Decrease exposure timeDecrease development timePlace it back in the fixerPlace it back in the developerQuestion 2 of 20 3. The photosensitive component of an x-ray film is ______.Silver halide crystalsGelatinRare earth elementsSodium thiosulfate crystalsQuestion 3 of 20 4. If an unwrapped, nonprocessed x-ray film is exposed to normal light for just a second and then processed, it ______.May still be used but will be a little lightMay still be used but will be a little darkWill be completely blackMay still be used but will be brownQuestion 4 of 20 5. dead bone appear on a radiograph ascotton wool appearanceradiolucentradio opaquesalt and pepper appearanceQuestion 5 of 20 6. Digital x-rays require less radiation than conventional x-rays because:The sensor is largerThe sensor is more sensitive to x-raysThe pixels sense transmitted light quicklyThe exposure time is increasedQuestion 6 of 20 7. moth eaten appearance is seen in all exceptosteomyelitisosteosarcomaOKChemorrhagic bone cystQuestion 7 of 20 8. A first-year dental student helping out in the clinic for the first time repeatedly obtains x-rays of tooth #14 with a zigzagged pattern. What could have prevented the zigzagged pattern on the radiographic image?Using the film only once instead of exposing it multiple timesPlacing the film incorrectly with the lead portion facing the coneBending the film less when placing in positionTelling the patient not to move during the exposureQuestion 8 of 20 9. Foreshorting where the teeth appear too short is caused by:Incorrect horizontal angulationBeam not aimed at the center of the filmToo much vertical angulationToo little vertical angulationQuestion 9 of 20 10. Discoid lupus erythematosus has all of the following characteristics except one. Which one is the exception?Involves damage to the heart and kidneyAffects the skin of the face and scalpPredominately affects middle-aged womenProduces oral lesions that resemble erosive lichen planusQuestion 10 of 20 11. Bremsstrahlung radiation results from ____.X-rays interacting with electronsElectrons interacting with tungsten nucleiElectrons interacting with electronsL shell electrons falling into the K shellQuestion 11 of 20 12. Highly radiosensitive cells areLiverBuccal mucosaLungRetinaQuestion 12 of 20 13. Best view for condylar neck fratureOccipito mentalReverse towne'sPA skullSubmentovertexQuestion 13 of 20 14. Hurter Driffield Index is used to measureDental cariesStainless steelradiographNiTi instrumentQuestion 14 of 20 15. Film size used to evaluate TMJ5*7 inch8*10 inch10*12 inch4*3 inchQuestion 15 of 20 16. Least radiation exposure occurs inArthrographyMRIOPGCT scanQuestion 16 of 20 17. The function of the filament is toRelease photonsRelease electronsConvert photons into electronsConvert electrons into photonsQuestion 17 of 20 18. which is the best technique for detecting proximal caries in children with minimum radiation exposurepanoramic radiographybitewing with paralleling technique bitewing with RVGbitewing with bisecting angle technique Question 18 of 20 19. SI unit of radioactivity isbecquerelcurieroentgengrayQuestion 19 of 20 20. all of the following form radiolucent stones exceptcysteineorotic acidallopurinolxanthineQuestion 20 of 20 Loading...
