6. a DPT is one example of an extra-oral radiograph view. what is used to ensure x-ray exposure is kept to a minimum when taking DPT?
light-tight cassette case
intensifying screens
larger films
fast films
7. under which one of the following circumstances must a radiation protection supervisor be appointed in the dental workplace?
all workplaces using ionising radiation
all workplaces with 2 or more x-ray machines
all workplaces taking dental pantomographs
all workplaces with a cephalostat machine
8. when x-rays are directed at body tissues, the beam is absorbed at varying levels, depending on the mineral content of the tissue. which one of the following terms describes those that absorb little of the beam?
radiopaque
translucent
radiolucent
fluorescent
9. which statement is true with regards to the processing of radiographs
automatic processors must be used under a safety light
developer solution is alkaline
automatic processing is quicker than digital imaging
fixer solution is passed as trade waste
10. which one of the following groups of documents does not have to be stored in the radiation protection file?
local rules
radiation qualification certificates
formal appointments
quality assurance programmes
11. what is the correct correct term used to describe the 2m distance around the x-ray machine head during exposure?
contingency plan
dose investigation level
safety zone
controlled area
12. which one of the following is true with regards to the correct storage of x-ray films stock?
films do not have an expiry date like chemical
old and new stockk must be not stored together
old stock must be used first
fast films must be kept in their original package
13. when a periapical view of an upper incisor is mounted for viewing, which one of the following correctly describes the orientation of the film on the viewer?
pimple in the top left corner of the film
mesial edge of the tooth to the right of the film
incisor root above the crown
pimple in the bottom left corner of the film
14. which one of the following is false with regard to the storage of digital images of the teeth?
cannot be printed out
cannot be allocated to another person
can be emailed to colleagues
can be stored of a disc
15. which one states that the light-sensitive chemicals that are used to coat the celluloid film within an intra-oral x-ray film packet?
sliver bromide salts
rare earth chemicals
mercury
lead
16. an anteior occlusal radiograph has been taken to determine the positions of both un erupted upper canines. which one should be used to determine the correct orientation of the radiographs , so that the left and the right teeth can be separately identified
pimple in the upper left corner
pimple forwards
crowns to the top
tooth roots to the top
17. which one describes the correct angulation of the film that is necessary to be produced during the exposure of an intra-oral film packet using a film-holder?
which-rimmed black area at the apex
black area along the root
rounded black area at the apex
white area along the root
18. the dental terminology used to describe diagnostic items once they have been exposed and processed is quite distinct. which one correctly describes an item that is mounted on a viewer following processing?
x-ray film
film
radiograph
film packet
19. radiation monitoring badges must be worn by the dental staff when a set number of intra-oral and/or extra-oral radiographs are exceeded in a week. what is the set number ?
