1|Page
BDA Dental Radiography and Radiology Exam 2026 |
Actual Exam ||Verified Exam!!|| British Dental
Association | Dental Radiography
Certification||Newest Exam!!!
What's direct action film? - Answer-Intra oral film. Only
sensitive to xray photons
What's indirect action film - Answer-Extra oral with
intensifying screen & cassette . sensitive to light photons
Why is direct action film used for intra oral - Answer-For
excellent image quality
black paper is used on either side of the film to protect the
film from...? - Answer-Light
damage by fingers
saliva that may leak into film packet
Why is a thin sheet of lead foil placed behind the film? -
Answer-To stop residual radiation going further into pt
tissues
, 2|Page
To stop secondary radiation from scattering back onto film
and degrading the image
If film was placed wrong way in pts mouth the lead foil
would show on radiograph making the fault easily
identified
Increasing the Ma will make the image - Answer-too
dark/blacken
Decreasing the mA will make the image - Answer-Too
white / light
What % of energy is conducted as heat and X-rays ? -
Answer-Heat -99%
Xrays - 1%
What is the recommended FSD - Answer-200mm or 20cm
What are the dose units used for radiography - Answer-
Radiation absorbed dose
Equivalent dose
Effective dose
BDA Dental Radiography and Radiology Exam 2026 |
Actual Exam ||Verified Exam!!|| British Dental
Association | Dental Radiography
Certification||Newest Exam!!!
What's direct action film? - Answer-Intra oral film. Only
sensitive to xray photons
What's indirect action film - Answer-Extra oral with
intensifying screen & cassette . sensitive to light photons
Why is direct action film used for intra oral - Answer-For
excellent image quality
black paper is used on either side of the film to protect the
film from...? - Answer-Light
damage by fingers
saliva that may leak into film packet
Why is a thin sheet of lead foil placed behind the film? -
Answer-To stop residual radiation going further into pt
tissues
, 2|Page
To stop secondary radiation from scattering back onto film
and degrading the image
If film was placed wrong way in pts mouth the lead foil
would show on radiograph making the fault easily
identified
Increasing the Ma will make the image - Answer-too
dark/blacken
Decreasing the mA will make the image - Answer-Too
white / light
What % of energy is conducted as heat and X-rays ? -
Answer-Heat -99%
Xrays - 1%
What is the recommended FSD - Answer-200mm or 20cm
What are the dose units used for radiography - Answer-
Radiation absorbed dose
Equivalent dose
Effective dose
