Page 1 of 128
BDA RADIOGRAPHY AND RADIOLOGY 2025/2026
EXAM BANK CURRENTLY TESTING QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED)
/GUARANTEED PASS/ TOP-RATED A+.
BDA
Ace your BDA Dental Radiography and Radiology exam with this
definitive guide, designed to master imaging techniques,
radiation safety, and diagnostic interpretation for oral
healthcare. This resource delivers scenario-based practice
questions aligned with clinical standards and regulatory
protocols.
What are X-rays classified as in terms of radiation? ......
ANSWER ....... X-rays are classified as ionising radiation.
What is the difference between X-rays and gamma rays?
...... ANSWER ....... Gamma rays are naturally occurring,
while X-rays are man-made.
What are the four main ways X-ray photons can interact with
matter? ...... ANSWER ....... 1. Transmission - pass
through matter without interaction. 2. Absorption - all
energy is absorbed by matter.
3. Absorption and Scatter - deflected with energy loss.
, Page 2 of 128
4. Pure Scatter - deflected with no energy loss.
What are tissue reaction effects in the context of ionising
radiation? ...... ANSWER ....... Tissue reaction effects
(somatic, deterministic effects) result from high doses of
radiation, where the severity of damage is proportional to
the dose.
What are stochastic effects of ionising radiation? ......
ANSWER ....... Stochastic effects are chance effects that
can occur from any dose of radiation, with severity not
related to the dose. A single X-ray photon can potentially
cause fatal cancer.
What is the main aim of radiation protection in dental
radiography? ...... ANSWER ....... To completely prevent
deterministic effects and limit the chances of stochastic
effects to an acceptable level.
What is the nature of X-rays? ...... ANSWER ....... X-rays
are packets of energy called photons that travel in
straight lines and can travel in a vacuum.
, Page 3 of 128
How do X-rays interact with film emulsion? ...... ANSWER
....... X-rays can blacken film emulsion to create an
image.
What is the significance of the phrase 'there is no such thing
as a safe dose of radiation'? ...... ANSWER ....... It
emphasizes that any exposure to radiation carries some
level of risk.
What are the characteristics of X-ray photons? ......
ANSWER ....... X-ray photons have a short wavelength
and high energy, originating and interacting at the atomic
level.
What are the genetic effects of ionising radiation? ......
ANSWER ....... Genetic effects occur in reproductive
cells (egg and sperm) and may affect future offspring.
What is the relationship between radiation dose and
stochastic effects? ...... ANSWER ....... Increasing the
radiation dose increases the chance of stochastic
damage occurring.
, Page 4 of 128
What is the significance of the term 'ionising radiation'?
...... ANSWER ....... Ionising radiation has enough energy
to remove tightly bound electrons from atoms, which can
lead to tissue damage.
What is the potential risk associated with a single X-ray
photon? ...... ANSWER ....... Although very unlikely, it
has the potential to cause fatal cancer.
What is the role of physical methods in radiation protection?
...... ANSWER ....... Physical methods are used to reduce
the level of risk involved with radiation exposure.
What is the nature of photons in the electromagnetic
spectrum? ...... ANSWER ....... Photons come in a wide
range of energies, with very low energy making up radio
waves and medium energy visible as light.
What is the importance of understanding atomic
interactions in X-ray production? ...... ANSWER .......
Understanding atomic interactions is crucial for
explaining how X-rays are produced.
BDA RADIOGRAPHY AND RADIOLOGY 2025/2026
EXAM BANK CURRENTLY TESTING QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED)
/GUARANTEED PASS/ TOP-RATED A+.
BDA
Ace your BDA Dental Radiography and Radiology exam with this
definitive guide, designed to master imaging techniques,
radiation safety, and diagnostic interpretation for oral
healthcare. This resource delivers scenario-based practice
questions aligned with clinical standards and regulatory
protocols.
What are X-rays classified as in terms of radiation? ......
ANSWER ....... X-rays are classified as ionising radiation.
What is the difference between X-rays and gamma rays?
...... ANSWER ....... Gamma rays are naturally occurring,
while X-rays are man-made.
What are the four main ways X-ray photons can interact with
matter? ...... ANSWER ....... 1. Transmission - pass
through matter without interaction. 2. Absorption - all
energy is absorbed by matter.
3. Absorption and Scatter - deflected with energy loss.
, Page 2 of 128
4. Pure Scatter - deflected with no energy loss.
What are tissue reaction effects in the context of ionising
radiation? ...... ANSWER ....... Tissue reaction effects
(somatic, deterministic effects) result from high doses of
radiation, where the severity of damage is proportional to
the dose.
What are stochastic effects of ionising radiation? ......
ANSWER ....... Stochastic effects are chance effects that
can occur from any dose of radiation, with severity not
related to the dose. A single X-ray photon can potentially
cause fatal cancer.
What is the main aim of radiation protection in dental
radiography? ...... ANSWER ....... To completely prevent
deterministic effects and limit the chances of stochastic
effects to an acceptable level.
What is the nature of X-rays? ...... ANSWER ....... X-rays
are packets of energy called photons that travel in
straight lines and can travel in a vacuum.
, Page 3 of 128
How do X-rays interact with film emulsion? ...... ANSWER
....... X-rays can blacken film emulsion to create an
image.
What is the significance of the phrase 'there is no such thing
as a safe dose of radiation'? ...... ANSWER ....... It
emphasizes that any exposure to radiation carries some
level of risk.
What are the characteristics of X-ray photons? ......
ANSWER ....... X-ray photons have a short wavelength
and high energy, originating and interacting at the atomic
level.
What are the genetic effects of ionising radiation? ......
ANSWER ....... Genetic effects occur in reproductive
cells (egg and sperm) and may affect future offspring.
What is the relationship between radiation dose and
stochastic effects? ...... ANSWER ....... Increasing the
radiation dose increases the chance of stochastic
damage occurring.
, Page 4 of 128
What is the significance of the term 'ionising radiation'?
...... ANSWER ....... Ionising radiation has enough energy
to remove tightly bound electrons from atoms, which can
lead to tissue damage.
What is the potential risk associated with a single X-ray
photon? ...... ANSWER ....... Although very unlikely, it
has the potential to cause fatal cancer.
What is the role of physical methods in radiation protection?
...... ANSWER ....... Physical methods are used to reduce
the level of risk involved with radiation exposure.
What is the nature of photons in the electromagnetic
spectrum? ...... ANSWER ....... Photons come in a wide
range of energies, with very low energy making up radio
waves and medium energy visible as light.
What is the importance of understanding atomic
interactions in X-ray production? ...... ANSWER .......
Understanding atomic interactions is crucial for
explaining how X-rays are produced.
